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【335092】河南周口市2020-2021学年九年级物理上册期末试卷

时间:2025-01-30 09:27:23 作者: 字数:10298字
简介:

2020-2021学年河南周口九年级上物理期末试卷

一、填空题

 

1. 逍遥胡辣汤因其独特的色、香、味而深受人们喜爱,当人们盛上一碗热气腾腾的胡辣汤时,满屋香气四溢,这是________现象;胡辣汤的温度越高,香味就越浓烈,这是因为________

 

2. 打扫房间时,小刚用干绸布擦穿衣镜,发现擦过的镜面很容易粘上细小绒毛,这是因为他擦过的镜面因________而带了电,带电体有________的性质,所以绒毛被吸在镜面上.

 

3. “可燃冰”作为新型能源有着巨大的开发使用潜力,  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/555/" title="河南" class="c1" target="_blank">河南</a> <a href="/tags/1163/" title="物理" class="c1" target="_blank">物理</a> <a href="/tags/1520/" title="周口" class="c1" target="_blank">周口</a> “可燃冰”完全燃烧放出的热量为 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/555/" title="河南" class="c1" target="_blank">河南</a> <a href="/tags/1163/" title="物理" class="c1" target="_blank">物理</a> <a href="/tags/1520/" title="周口" class="c1" target="_blank">周口</a> ,若需要 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/555/" title="河南" class="c1" target="_blank">河南</a> <a href="/tags/1163/" title="物理" class="c1" target="_blank">物理</a> <a href="/tags/1520/" title="周口" class="c1" target="_blank">周口</a> 的热量应该完全燃烧________ <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/555/" title="河南" class="c1" target="_blank">河南</a> <a href="/tags/1163/" title="物理" class="c1" target="_blank">物理</a> <a href="/tags/1520/" title="周口" class="c1" target="_blank">周口</a> 的“可燃冰”,若这些热量 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/555/" title="河南" class="c1" target="_blank">河南</a> <a href="/tags/1163/" title="物理" class="c1" target="_blank">物理</a> <a href="/tags/1520/" title="周口" class="c1" target="_blank">周口</a> 被水吸收,可使________ <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/555/" title="河南" class="c1" target="_blank">河南</a> <a href="/tags/1163/" title="物理" class="c1" target="_blank">物理</a> <a href="/tags/1520/" title="周口" class="c1" target="_blank">周口</a> 的水从 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/555/" title="河南" class="c1" target="_blank">河南</a> <a href="/tags/1163/" title="物理" class="c1" target="_blank">物理</a> <a href="/tags/1520/" title="周口" class="c1" target="_blank">周口</a> 升高到 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/555/" title="河南" class="c1" target="_blank">河南</a> <a href="/tags/1163/" title="物理" class="c1" target="_blank">物理</a> <a href="/tags/1520/" title="周口" class="c1" target="_blank">周口</a>

 

4. 如图为电能表的实物图,小华只让家里的空调单独工作,测出 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/555/" title="河南" class="c1" target="_blank">河南</a> <a href="/tags/1163/" title="物理" class="c1" target="_blank">物理</a> <a href="/tags/1520/" title="周口" class="c1" target="_blank">周口</a> 内电能表转盘转过 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/555/" title="河南" class="c1" target="_blank">河南</a> <a href="/tags/1163/" title="物理" class="c1" target="_blank">物理</a> <a href="/tags/1520/" title="周口" class="c1" target="_blank">周口</a> ,则空调这段时间内消耗的电能是________ <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/555/" title="河南" class="c1" target="_blank">河南</a> <a href="/tags/1163/" title="物理" class="c1" target="_blank">物理</a> <a href="/tags/1520/" title="周口" class="c1" target="_blank">周口</a> ,空调的实际功率为________ <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/555/" title="河南" class="c1" target="_blank">河南</a> <a href="/tags/1163/" title="物理" class="c1" target="_blank">物理</a> <a href="/tags/1520/" title="周口" class="c1" target="_blank">周口</a> .如果让家中用电器同时工作,则小明家中最多能接入额定功率为________ <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/555/" title="河南" class="c1" target="_blank">河南</a> <a href="/tags/1163/" title="物理" class="c1" target="_blank">物理</a> <a href="/tags/1520/" title="周口" class="c1" target="_blank">周口</a> 的用电电器.
 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/555/" title="河南" class="c1" target="_blank">河南</a> <a href="/tags/1163/" title="物理" class="c1" target="_blank">物理</a> <a href="/tags/1520/" title="周口" class="c1" target="_blank">周口</a>

 

5. 如图 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/555/" title="河南" class="c1" target="_blank">河南</a> <a href="/tags/1163/" title="物理" class="c1" target="_blank">物理</a> <a href="/tags/1520/" title="周口" class="c1" target="_blank">周口</a> 所示的电路中,电源电压保持不变,闭合开关 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/555/" title="河南" class="c1" target="_blank">河南</a> <a href="/tags/1163/" title="物理" class="c1" target="_blank">物理</a> <a href="/tags/1520/" title="周口" class="c1" target="_blank">周口</a> ,滑动变阻器的滑片 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/555/" title="河南" class="c1" target="_blank">河南</a> <a href="/tags/1163/" title="物理" class="c1" target="_blank">物理</a> <a href="/tags/1520/" title="周口" class="c1" target="_blank">周口</a> <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/555/" title="河南" class="c1" target="_blank">河南</a> <a href="/tags/1163/" title="物理" class="c1" target="_blank">物理</a> <a href="/tags/1520/" title="周口" class="c1" target="_blank">周口</a> 端移到 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/555/" title="河南" class="c1" target="_blank">河南</a> <a href="/tags/1163/" title="物理" class="c1" target="_blank">物理</a> <a href="/tags/1520/" title="周口" class="c1" target="_blank">周口</a> 端的整个过程中,电流表示数 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/555/" title="河南" class="c1" target="_blank">河南</a> <a href="/tags/1163/" title="物理" class="c1" target="_blank">物理</a> <a href="/tags/1520/" title="周口" class="c1" target="_blank">周口</a> 与电压表示数 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/555/" title="河南" class="c1" target="_blank">河南</a> <a href="/tags/1163/" title="物理" class="c1" target="_blank">物理</a> <a href="/tags/1520/" title="周口" class="c1" target="_blank">周口</a> 的关系图像如图 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/555/" title="河南" class="c1" target="_blank">河南</a> <a href="/tags/1163/" title="物理" class="c1" target="_blank">物理</a> <a href="/tags/1520/" title="周口" class="c1" target="_blank">周口</a> 所示,则电阻 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/555/" title="河南" class="c1" target="_blank">河南</a> <a href="/tags/1163/" title="物理" class="c1" target="_blank">物理</a> <a href="/tags/1520/" title="周口" class="c1" target="_blank">周口</a> 的阻值为________ <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/555/" title="河南" class="c1" target="_blank">河南</a> <a href="/tags/1163/" title="物理" class="c1" target="_blank">物理</a> <a href="/tags/1520/" title="周口" class="c1" target="_blank">周口</a> ,电源电压为________ <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/555/" title="河南" class="c1" target="_blank">河南</a> <a href="/tags/1163/" title="物理" class="c1" target="_blank">物理</a> <a href="/tags/1520/" title="周口" class="c1" target="_blank">周口</a> ;当变阻器的滑片 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/555/" title="河南" class="c1" target="_blank">河南</a> <a href="/tags/1163/" title="物理" class="c1" target="_blank">物理</a> <a href="/tags/1520/" title="周口" class="c1" target="_blank">周口</a> <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/555/" title="河南" class="c1" target="_blank">河南</a> <a href="/tags/1163/" title="物理" class="c1" target="_blank">物理</a> <a href="/tags/1520/" title="周口" class="c1" target="_blank">周口</a> 端滑到 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/555/" title="河南" class="c1" target="_blank">河南</a> <a href="/tags/1163/" title="物理" class="c1" target="_blank">物理</a> <a href="/tags/1520/" title="周口" class="c1" target="_blank">周口</a> 端过程中,滑动变阻器 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/555/" title="河南" class="c1" target="_blank">河南</a> <a href="/tags/1163/" title="物理" class="c1" target="_blank">物理</a> <a href="/tags/1520/" title="周口" class="c1" target="_blank">周口</a> 的最大电功率为________ <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/555/" title="河南" class="c1" target="_blank">河南</a> <a href="/tags/1163/" title="物理" class="c1" target="_blank">物理</a> <a href="/tags/1520/" title="周口" class="c1" target="_blank">周口</a>
 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/555/" title="河南" class="c1" target="_blank">河南</a> <a href="/tags/1163/" title="物理" class="c1" target="_blank">物理</a> <a href="/tags/1520/" title="周口" class="c1" target="_blank">周口</a>

 

6. 在探究通电螺线管外部磁场方向的实验中,某小组的同学在螺线管的左端放上一个小磁针,通电后发现小磁针的指向如图甲所示;接下来他们通过对调电池的正负极改变了螺线管中的电流方向,发现小磁针静止时南北极所指方向发生了改变,如图乙所示.该实验中小磁针的作用是________,请你写出该小组同学所探究的问题是________
 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/555/" title="河南" class="c1" target="_blank">河南</a> <a href="/tags/1163/" title="物理" class="c1" target="_blank">物理</a> <a href="/tags/1520/" title="周口" class="c1" target="_blank">周口</a>

二、选择题

 

下列说法中不正确的是(       

A.秋叶随风飘落说明分子做无规则运动

B.常见的物质由大量的分子、原子构成

C.物质内的分子在不停地运动

D.分子运动越剧烈,物体的温度越高

 

关于温度、内能和热量,以下说法正确的是(        )

A. <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/555/" title="河南" class="c1" target="_blank">河南</a> <a href="/tags/1163/" title="物理" class="c1" target="_blank">物理</a> <a href="/tags/1520/" title="周口" class="c1" target="_blank">周口</a> 的冰变成 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/555/" title="河南" class="c1" target="_blank">河南</a> <a href="/tags/1163/" title="物理" class="c1" target="_blank">物理</a> <a href="/tags/1520/" title="周口" class="c1" target="_blank">周口</a> 的水,温度不变,内能不变

B.温度越高的物体所含的热量越多

C.热量总是从内能大的物体向内能小的物体传递

D.温度相同的两个物体间不会发生热传递

 

如图是内燃机某冲程的工作示意图,下面四个事例中能量转化与之相同的是(
 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/555/" title="河南" class="c1" target="_blank">河南</a> <a href="/tags/1163/" title="物理" class="c1" target="_blank">物理</a> <a href="/tags/1520/" title="周口" class="c1" target="_blank">周口</a>

A. <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/555/" title="河南" class="c1" target="_blank">河南</a> <a href="/tags/1163/" title="物理" class="c1" target="_blank">物理</a> <a href="/tags/1520/" title="周口" class="c1" target="_blank">周口</a> 搓手取暖 B. <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/555/" title="河南" class="c1" target="_blank">河南</a> <a href="/tags/1163/" title="物理" class="c1" target="_blank">物理</a> <a href="/tags/1520/" title="周口" class="c1" target="_blank">周口</a> 瓶塞冲出
C. <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/555/" title="河南" class="c1" target="_blank">河南</a> <a href="/tags/1163/" title="物理" class="c1" target="_blank">物理</a> <a href="/tags/1520/" title="周口" class="c1" target="_blank">周口</a> 压缩气体 D. <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/555/" title="河南" class="c1" target="_blank">河南</a> <a href="/tags/1163/" title="物理" class="c1" target="_blank">物理</a> <a href="/tags/1520/" title="周口" class="c1" target="_blank">周口</a> 钻木取火


 

炎炎夏日,烈日下海滩的沙子热得烫脚,而海水很清凉,傍晚落日后,沙子凉了,海水却依然暖暖的,这主要是因为海水和沙子具有不同的(

A.内能 B.密度 C.比热容 D.热量

 

如图所示电路中,电源两端电压保持不变, <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/555/" title="河南" class="c1" target="_blank">河南</a> <a href="/tags/1163/" title="物理" class="c1" target="_blank">物理</a> <a href="/tags/1520/" title="周口" class="c1" target="_blank">周口</a> 为定值电阻, <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/555/" title="河南" class="c1" target="_blank">河南</a> <a href="/tags/1163/" title="物理" class="c1" target="_blank">物理</a> <a href="/tags/1520/" title="周口" class="c1" target="_blank">周口</a> 为滑动变阻器.闭合开关 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/555/" title="河南" class="c1" target="_blank">河南</a> <a href="/tags/1163/" title="物理" class="c1" target="_blank">物理</a> <a href="/tags/1520/" title="周口" class="c1" target="_blank">周口</a> ,当滑动变阻器的滑片 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/555/" title="河南" class="c1" target="_blank">河南</a> <a href="/tags/1163/" title="物理" class="c1" target="_blank">物理</a> <a href="/tags/1520/" title="周口" class="c1" target="_blank">周口</a> 向左滑动时,下列判断正确的是(         )
 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/555/" title="河南" class="c1" target="_blank">河南</a> <a href="/tags/1163/" title="物理" class="c1" target="_blank">物理</a> <a href="/tags/1520/" title="周口" class="c1" target="_blank">周口</a>

A.滑动变阻器 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/555/" title="河南" class="c1" target="_blank">河南</a> <a href="/tags/1163/" title="物理" class="c1" target="_blank">物理</a> <a href="/tags/1520/" title="周口" class="c1" target="_blank">周口</a> 的阻值变大

B.电流表的示数变小

C.电压表的示数不变

D.电压表示数跟电流表示数的比值不变

 

小聪用餐巾纸反复摩擦一根饮料吸管乙,然后把乙靠近另一根用支架支着能自由转动的吸管甲的一端,如图所示,发现甲、乙互相吸引.下列对实验现象的分析正确的是(       
 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/555/" title="河南" class="c1" target="_blank">河南</a> <a href="/tags/1163/" title="物理" class="c1" target="_blank">物理</a> <a href="/tags/1520/" title="周口" class="c1" target="_blank">周口</a>

A.乙靠近摩擦过的餐巾纸,二者相互排斥

B.甲带正电荷,乙带负电荷

C.乙靠近摩擦过的餐巾纸,二者相互吸引

D.甲带负电荷,乙带正电荷

 

灯泡 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/555/" title="河南" class="c1" target="_blank">河南</a> <a href="/tags/1163/" title="物理" class="c1" target="_blank">物理</a> <a href="/tags/1520/" title="周口" class="c1" target="_blank">周口</a> 与定值电阻 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/555/" title="河南" class="c1" target="_blank">河南</a> <a href="/tags/1163/" title="物理" class="c1" target="_blank">物理</a> <a href="/tags/1520/" title="周口" class="c1" target="_blank">周口</a> <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/555/" title="河南" class="c1" target="_blank">河南</a> <a href="/tags/1163/" title="物理" class="c1" target="_blank">物理</a> <a href="/tags/1520/" title="周口" class="c1" target="_blank">周口</a> 图象如图所示.若将 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/555/" title="河南" class="c1" target="_blank">河南</a> <a href="/tags/1163/" title="物理" class="c1" target="_blank">物理</a> <a href="/tags/1520/" title="周口" class="c1" target="_blank">周口</a> <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/555/" title="河南" class="c1" target="_blank">河南</a> <a href="/tags/1163/" title="物理" class="c1" target="_blank">物理</a> <a href="/tags/1520/" title="周口" class="c1" target="_blank">周口</a> 串联在 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/555/" title="河南" class="c1" target="_blank">河南</a> <a href="/tags/1163/" title="物理" class="c1" target="_blank">物理</a> <a href="/tags/1520/" title="周口" class="c1" target="_blank">周口</a> 的电源上,下列说法正确的是(        )
 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/555/" title="河南" class="c1" target="_blank">河南</a> <a href="/tags/1163/" title="物理" class="c1" target="_blank">物理</a> <a href="/tags/1520/" title="周口" class="c1" target="_blank">周口</a>

A.电路中的电流是 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/555/" title="河南" class="c1" target="_blank">河南</a> <a href="/tags/1163/" title="物理" class="c1" target="_blank">物理</a> <a href="/tags/1520/" title="周口" class="c1" target="_blank">周口</a> B.灯泡的电阻是 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/555/" title="河南" class="c1" target="_blank">河南</a> <a href="/tags/1163/" title="物理" class="c1" target="_blank">物理</a> <a href="/tags/1520/" title="周口" class="c1" target="_blank">周口</a>
C.电路消耗的总功率是 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/555/" title="河南" class="c1" target="_blank">河南</a> <a href="/tags/1163/" title="物理" class="c1" target="_blank">物理</a> <a href="/tags/1520/" title="周口" class="c1" target="_blank">周口</a> D.灯泡两端的电压是 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/555/" title="河南" class="c1" target="_blank">河南</a> <a href="/tags/1163/" title="物理" class="c1" target="_blank">物理</a> <a href="/tags/1520/" title="周口" class="c1" target="_blank">周口</a>


 

如图是课本“探究电流通过导体产生的热量与导体电阻间关系”的实验装置,两个透明容器中封闭着等量的空气,电路正确连接后,通电进行实验过程中,下列说法正确的是(        )
 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/555/" title="河南" class="c1" target="_blank">河南</a> <a href="/tags/1163/" title="物理" class="c1" target="_blank">物理</a> <a href="/tags/1520/" title="周口" class="c1" target="_blank">周口</a>

A.要保持两个电阻丝两端电压相等

B.左边容器电阻丝中的电流比右边容器电阻丝中的电流大

C.通电时间相同,两个容器中空气吸收的热量不同

D. <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/555/" title="河南" class="c1" target="_blank">河南</a> <a href="/tags/1163/" title="物理" class="c1" target="_blank">物理</a> <a href="/tags/1520/" title="周口" class="c1" target="_blank">周口</a> 形管中液面高度的变化反映电阻丝产生热量的多少

三、作图题

 

如图所示,将一条形磁体放在小车上,并靠近螺线管,闭合开关后小车向右运动,请你标出通电螺线管的“ <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/555/" title="河南" class="c1" target="_blank">河南</a> <a href="/tags/1163/" title="物理" class="c1" target="_blank">物理</a> <a href="/tags/1520/" title="周口" class="c1" target="_blank">周口</a> ”“ <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/555/" title="河南" class="c1" target="_blank">河南</a> <a href="/tags/1163/" title="物理" class="c1" target="_blank">物理</a> <a href="/tags/1520/" title="周口" class="c1" target="_blank">周口</a> ”极和电源的“ <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/555/" title="河南" class="c1" target="_blank">河南</a> <a href="/tags/1163/" title="物理" class="c1" target="_blank">物理</a> <a href="/tags/1520/" title="周口" class="c1" target="_blank">周口</a> ”“ <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/555/" title="河南" class="c1" target="_blank">河南</a> <a href="/tags/1163/" title="物理" class="c1" target="_blank">物理</a> <a href="/tags/1520/" title="周口" class="c1" target="_blank">周口</a> ”极.
 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/555/" title="河南" class="c1" target="_blank">河南</a> <a href="/tags/1163/" title="物理" class="c1" target="_blank">物理</a> <a href="/tags/1520/" title="周口" class="c1" target="_blank">周口</a>

四、实验探究题

 

为了比较水和食用油的吸热能力,小明用两个完全相同的装置做了如下图所示的实验.用温度计测量水和食用油吸收热量前后的温度值,并用钟表记录加热时间,实验数据如下表所示.


物质

质量
 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/555/" title="河南" class="c1" target="_blank">河南</a> <a href="/tags/1163/" title="物理" class="c1" target="_blank">物理</a> <a href="/tags/1520/" title="周口" class="c1" target="_blank">周口</a>

初始温度 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/555/" title="河南" class="c1" target="_blank">河南</a> <a href="/tags/1163/" title="物理" class="c1" target="_blank">物理</a> <a href="/tags/1520/" title="周口" class="c1" target="_blank">周口</a>

最后温度 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/555/" title="河南" class="c1" target="_blank">河南</a> <a href="/tags/1163/" title="物理" class="c1" target="_blank">物理</a> <a href="/tags/1520/" title="周口" class="c1" target="_blank">周口</a>

加热时间 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/555/" title="河南" class="c1" target="_blank">河南</a> <a href="/tags/1163/" title="物理" class="c1" target="_blank">物理</a> <a href="/tags/1520/" title="周口" class="c1" target="_blank">周口</a>

 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/555/" title="河南" class="c1" target="_blank">河南</a> <a href="/tags/1163/" title="物理" class="c1" target="_blank">物理</a> <a href="/tags/1520/" title="周口" class="c1" target="_blank">周口</a>

 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/555/" title="河南" class="c1" target="_blank">河南</a> <a href="/tags/1163/" title="物理" class="c1" target="_blank">物理</a> <a href="/tags/1520/" title="周口" class="c1" target="_blank">周口</a>

 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/555/" title="河南" class="c1" target="_blank">河南</a> <a href="/tags/1163/" title="物理" class="c1" target="_blank">物理</a> <a href="/tags/1520/" title="周口" class="c1" target="_blank">周口</a>

 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/555/" title="河南" class="c1" target="_blank">河南</a> <a href="/tags/1163/" title="物理" class="c1" target="_blank">物理</a> <a href="/tags/1520/" title="周口" class="c1" target="_blank">周口</a>

食用油

 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/555/" title="河南" class="c1" target="_blank">河南</a> <a href="/tags/1163/" title="物理" class="c1" target="_blank">物理</a> <a href="/tags/1520/" title="周口" class="c1" target="_blank">周口</a>

 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/555/" title="河南" class="c1" target="_blank">河南</a> <a href="/tags/1163/" title="物理" class="c1" target="_blank">物理</a> <a href="/tags/1520/" title="周口" class="c1" target="_blank">周口</a>

 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/555/" title="河南" class="c1" target="_blank">河南</a> <a href="/tags/1163/" title="物理" class="c1" target="_blank">物理</a> <a href="/tags/1520/" title="周口" class="c1" target="_blank">周口</a>

 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/555/" title="河南" class="c1" target="_blank">河南</a> <a href="/tags/1163/" title="物理" class="c1" target="_blank">物理</a> <a href="/tags/1520/" title="周口" class="c1" target="_blank">周口</a>

 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/555/" title="河南" class="c1" target="_blank">河南</a> <a href="/tags/1163/" title="物理" class="c1" target="_blank">物理</a> <a href="/tags/1520/" title="周口" class="c1" target="_blank">周口</a>  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/555/" title="河南" class="c1" target="_blank">河南</a> <a href="/tags/1163/" title="物理" class="c1" target="_blank">物理</a> <a href="/tags/1520/" title="周口" class="c1" target="_blank">周口</a>

1)实验装置的组装顺序应该是________(选填“由上到下”或“由下到上”)

2)在此实验过程中用控制________的方法保证水和食用油吸收的热量相同,通过比较它们________来比较水和食用油吸热能力的差异.

3)在此实验中,如果要使水和食用油的最后温度相同,就要给________加热更长的时间.根据表中数据分析可得出________的比热容大.

 

某实验小组在“探究影响电阻大小的因素”时,选出符合要求的学生电源、滑动变阻器、电流表、开关、导线若干以及几种电阻丝,电阻丝的参数如下表.


编号

材料

长度 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/555/" title="河南" class="c1" target="_blank">河南</a> <a href="/tags/1163/" title="物理" class="c1" target="_blank">物理</a> <a href="/tags/1520/" title="周口" class="c1" target="_blank">周口</a>

横截面积 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/555/" title="河南" class="c1" target="_blank">河南</a> <a href="/tags/1163/" title="物理" class="c1" target="_blank">物理</a> <a href="/tags/1520/" title="周口" class="c1" target="_blank">周口</a>

 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/555/" title="河南" class="c1" target="_blank">河南</a> <a href="/tags/1163/" title="物理" class="c1" target="_blank">物理</a> <a href="/tags/1520/" title="周口" class="c1" target="_blank">周口</a>

镍铬合金丝

 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/555/" title="河南" class="c1" target="_blank">河南</a> <a href="/tags/1163/" title="物理" class="c1" target="_blank">物理</a> <a href="/tags/1520/" title="周口" class="c1" target="_blank">周口</a>

 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/555/" title="河南" class="c1" target="_blank">河南</a> <a href="/tags/1163/" title="物理" class="c1" target="_blank">物理</a> <a href="/tags/1520/" title="周口" class="c1" target="_blank">周口</a>

 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/555/" title="河南" class="c1" target="_blank">河南</a> <a href="/tags/1163/" title="物理" class="c1" target="_blank">物理</a> <a href="/tags/1520/" title="周口" class="c1" target="_blank">周口</a>

镍铬合金丝

 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/555/" title="河南" class="c1" target="_blank">河南</a> <a href="/tags/1163/" title="物理" class="c1" target="_blank">物理</a> <a href="/tags/1520/" title="周口" class="c1" target="_blank">周口</a>

 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/555/" title="河南" class="c1" target="_blank">河南</a> <a href="/tags/1163/" title="物理" class="c1" target="_blank">物理</a> <a href="/tags/1520/" title="周口" class="c1" target="_blank">周口</a>

 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/555/" title="河南" class="c1" target="_blank">河南</a> <a href="/tags/1163/" title="物理" class="c1" target="_blank">物理</a> <a href="/tags/1520/" title="周口" class="c1" target="_blank">周口</a>

镍铬合金丝

 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/555/" title="河南" class="c1" target="_blank">河南</a> <a href="/tags/1163/" title="物理" class="c1" target="_blank">物理</a> <a href="/tags/1520/" title="周口" class="c1" target="_blank">周口</a>

 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/555/" title="河南" class="c1" target="_blank">河南</a> <a href="/tags/1163/" title="物理" class="c1" target="_blank">物理</a> <a href="/tags/1520/" title="周口" class="c1" target="_blank">周口</a>

 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/555/" title="河南" class="c1" target="_blank">河南</a> <a href="/tags/1163/" title="物理" class="c1" target="_blank">物理</a> <a href="/tags/1520/" title="周口" class="c1" target="_blank">周口</a>

锰铜合金丝

 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/555/" title="河南" class="c1" target="_blank">河南</a> <a href="/tags/1163/" title="物理" class="c1" target="_blank">物理</a> <a href="/tags/1520/" title="周口" class="c1" target="_blank">周口</a>

 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/555/" title="河南" class="c1" target="_blank">河南</a> <a href="/tags/1163/" title="物理" class="c1" target="_blank">物理</a> <a href="/tags/1520/" title="周口" class="c1" target="_blank">周口</a>

小组成员做出了如下猜想:
猜想 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/555/" title="河南" class="c1" target="_blank">河南</a> <a href="/tags/1163/" title="物理" class="c1" target="_blank">物理</a> <a href="/tags/1520/" title="周口" class="c1" target="_blank">周口</a> :电阻大小与导体的长度有关;
猜想 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/555/" title="河南" class="c1" target="_blank">河南</a> <a href="/tags/1163/" title="物理" class="c1" target="_blank">物理</a> <a href="/tags/1520/" title="周口" class="c1" target="_blank">周口</a> :电阻大小与导体的材料有关;
猜想 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/555/" title="河南" class="c1" target="_blank">河南</a> <a href="/tags/1163/" title="物理" class="c1" target="_blank">物理</a> <a href="/tags/1520/" title="周口" class="c1" target="_blank">周口</a> :电阻大小与导体的横截面积有关;
设计了如图所示电路,请回答下列问题:
 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/555/" title="河南" class="c1" target="_blank">河南</a> <a href="/tags/1163/" title="物理" class="c1" target="_blank">物理</a> <a href="/tags/1520/" title="周口" class="c1" target="_blank">周口</a>

1)实验通过比较________的大小,来比较电阻丝电阻的大小.

2)若要验证猜想 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/555/" title="河南" class="c1" target="_blank">河南</a> <a href="/tags/1163/" title="物理" class="c1" target="_blank">物理</a> <a href="/tags/1520/" title="周口" class="c1" target="_blank">周口</a> ,则应该选用________两根电阻丝(填编号)进行对比实验.

3)选用 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/555/" title="河南" class="c1" target="_blank">河南</a> <a href="/tags/1163/" title="物理" class="c1" target="_blank">物理</a> <a href="/tags/1520/" title="周口" class="c1" target="_blank">周口</a> <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/555/" title="河南" class="c1" target="_blank">河南</a> <a href="/tags/1163/" title="物理" class="c1" target="_blank">物理</a> <a href="/tags/1520/" title="周口" class="c1" target="_blank">周口</a> 两根电阻丝进行对比实验,目的是为了验证猜想________

4)实验中如果将电流表更换成小灯泡,通过观察________也可以判断导体电阻的大小,但不足之处是________

 

在“测量小灯泡的额定功率”实验中,灯泡上标有“ <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/555/" title="河南" class="c1" target="_blank">河南</a> <a href="/tags/1163/" title="物理" class="c1" target="_blank">物理</a> <a href="/tags/1520/" title="周口" class="c1" target="_blank">周口</a> ”字样,电源电压恒定.
 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/555/" title="河南" class="c1" target="_blank">河南</a> <a href="/tags/1163/" title="物理" class="c1" target="_blank">物理</a> <a href="/tags/1520/" title="周口" class="c1" target="_blank">周口</a>

1)闭合开关前,滑动变阻器滑片应放在________端(选填“ <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/555/" title="河南" class="c1" target="_blank">河南</a> <a href="/tags/1163/" title="物理" class="c1" target="_blank">物理</a> <a href="/tags/1520/" title="周口" class="c1" target="_blank">周口</a> ”或“ <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/555/" title="河南" class="c1" target="_blank">河南</a> <a href="/tags/1163/" title="物理" class="c1" target="_blank">物理</a> <a href="/tags/1520/" title="周口" class="c1" target="_blank">周口</a> ”).

2)在移动变阻器滑片的过程中,眼睛应注视的________表的示数,直至灯泡正常发光,此时电流表的示数如图乙所示,则灯泡的额定功率为________ <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/555/" title="河南" class="c1" target="_blank">河南</a> <a href="/tags/1163/" title="物理" class="c1" target="_blank">物理</a> <a href="/tags/1520/" title="周口" class="c1" target="_blank">周口</a> .小华进行了 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/555/" title="河南" class="c1" target="_blank">河南</a> <a href="/tags/1163/" title="物理" class="c1" target="_blank">物理</a> <a href="/tags/1520/" title="周口" class="c1" target="_blank">周口</a> 次测量,并将有关数据及现象记录在表格中.实验得出的结论是:小灯泡的实际电功率________灯泡越亮.


次数

电压
 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/555/" title="河南" class="c1" target="_blank">河南</a> <a href="/tags/1163/" title="物理" class="c1" target="_blank">物理</a> <a href="/tags/1520/" title="周口" class="c1" target="_blank">周口</a>

电流
 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/555/" title="河南" class="c1" target="_blank">河南</a> <a href="/tags/1163/" title="物理" class="c1" target="_blank">物理</a> <a href="/tags/1520/" title="周口" class="c1" target="_blank">周口</a>

实际功率
 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/555/" title="河南" class="c1" target="_blank">河南</a> <a href="/tags/1163/" title="物理" class="c1" target="_blank">物理</a> <a href="/tags/1520/" title="周口" class="c1" target="_blank">周口</a>

灯泡亮度

 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/555/" title="河南" class="c1" target="_blank">河南</a> <a href="/tags/1163/" title="物理" class="c1" target="_blank">物理</a> <a href="/tags/1520/" title="周口" class="c1" target="_blank">周口</a>

 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/555/" title="河南" class="c1" target="_blank">河南</a> <a href="/tags/1163/" title="物理" class="c1" target="_blank">物理</a> <a href="/tags/1520/" title="周口" class="c1" target="_blank">周口</a>

 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/555/" title="河南" class="c1" target="_blank">河南</a> <a href="/tags/1163/" title="物理" class="c1" target="_blank">物理</a> <a href="/tags/1520/" title="周口" class="c1" target="_blank">周口</a>

 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/555/" title="河南" class="c1" target="_blank">河南</a> <a href="/tags/1163/" title="物理" class="c1" target="_blank">物理</a> <a href="/tags/1520/" title="周口" class="c1" target="_blank">周口</a>

偏暗

 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/555/" title="河南" class="c1" target="_blank">河南</a> <a href="/tags/1163/" title="物理" class="c1" target="_blank">物理</a> <a href="/tags/1520/" title="周口" class="c1" target="_blank">周口</a>

 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/555/" title="河南" class="c1" target="_blank">河南</a> <a href="/tags/1163/" title="物理" class="c1" target="_blank">物理</a> <a href="/tags/1520/" title="周口" class="c1" target="_blank">周口</a>



正常

 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/555/" title="河南" class="c1" target="_blank">河南</a> <a href="/tags/1163/" title="物理" class="c1" target="_blank">物理</a> <a href="/tags/1520/" title="周口" class="c1" target="_blank">周口</a>

 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/555/" title="河南" class="c1" target="_blank">河南</a> <a href="/tags/1163/" title="物理" class="c1" target="_blank">物理</a> <a href="/tags/1520/" title="周口" class="c1" target="_blank">周口</a>

 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/555/" title="河南" class="c1" target="_blank">河南</a> <a href="/tags/1163/" title="物理" class="c1" target="_blank">物理</a> <a href="/tags/1520/" title="周口" class="c1" target="_blank">周口</a>

 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/555/" title="河南" class="c1" target="_blank">河南</a> <a href="/tags/1163/" title="物理" class="c1" target="_blank">物理</a> <a href="/tags/1520/" title="周口" class="c1" target="_blank">周口</a>

更亮

3)完成上述实验后,小聪向老师要了一个已知阻值为 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/555/" title="河南" class="c1" target="_blank">河南</a> <a href="/tags/1163/" title="物理" class="c1" target="_blank">物理</a> <a href="/tags/1520/" title="周口" class="c1" target="_blank">周口</a> 的电阻和一个单刀双掷开关,借助部分现有的实验器材.设计了如图丙所示的电路,也测出了灯泡的额定功率.请完成下列实验步骤:
闭合开关 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/555/" title="河南" class="c1" target="_blank">河南</a> <a href="/tags/1163/" title="物理" class="c1" target="_blank">物理</a> <a href="/tags/1520/" title="周口" class="c1" target="_blank">周口</a> ,将 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/555/" title="河南" class="c1" target="_blank">河南</a> <a href="/tags/1163/" title="物理" class="c1" target="_blank">物理</a> <a href="/tags/1520/" title="周口" class="c1" target="_blank">周口</a> 拨到触点________(选填“ <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/555/" title="河南" class="c1" target="_blank">河南</a> <a href="/tags/1163/" title="物理" class="c1" target="_blank">物理</a> <a href="/tags/1520/" title="周口" class="c1" target="_blank">周口</a> ”或“ <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/555/" title="河南" class="c1" target="_blank">河南</a> <a href="/tags/1163/" title="物理" class="c1" target="_blank">物理</a> <a href="/tags/1520/" title="周口" class="c1" target="_blank">周口</a> ”),移动滑片,使电压表的示数为________ <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/555/" title="河南" class="c1" target="_blank">河南</a> <a href="/tags/1163/" title="物理" class="c1" target="_blank">物理</a> <a href="/tags/1520/" title="周口" class="c1" target="_blank">周口</a>
再将开关 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/555/" title="河南" class="c1" target="_blank">河南</a> <a href="/tags/1163/" title="物理" class="c1" target="_blank">物理</a> <a href="/tags/1520/" title="周口" class="c1" target="_blank">周口</a> 拨到触点________(选填“ <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/555/" title="河南" class="c1" target="_blank">河南</a> <a href="/tags/1163/" title="物理" class="c1" target="_blank">物理</a> <a href="/tags/1520/" title="周口" class="c1" target="_blank">周口</a> ”或“ <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/555/" title="河南" class="c1" target="_blank">河南</a> <a href="/tags/1163/" title="物理" class="c1" target="_blank">物理</a> <a href="/tags/1520/" title="周口" class="c1" target="_blank">周口</a> ”),保持滑片的位置不动,读出电压表的示数 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/555/" title="河南" class="c1" target="_blank">河南</a> <a href="/tags/1163/" title="物理" class="c1" target="_blank">物理</a> <a href="/tags/1520/" title="周口" class="c1" target="_blank">周口</a>
灯泡额定功率的表达式为 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/555/" title="河南" class="c1" target="_blank">河南</a> <a href="/tags/1163/" title="物理" class="c1" target="_blank">物理</a> <a href="/tags/1520/" title="周口" class="c1" target="_blank">周口</a> ________(用已知量和测量量表示).

五、解答题

 

如图所示,是最新一款无人到铁汽车原型图.汽车自动驾驶时使用雷达传感器,以及激光测距器来了解周围的交通状况.该款车以某速度在一段平直的公路上匀速行驶了一段距离时,消耗汽油 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/555/" title="河南" class="c1" target="_blank">河南</a> <a href="/tags/1163/" title="物理" class="c1" target="_blank">物理</a> <a href="/tags/1520/" title="周口" class="c1" target="_blank">周口</a> .汽油机的效率为 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/555/" title="河南" class="c1" target="_blank">河南</a> <a href="/tags/1163/" title="物理" class="c1" target="_blank">物理</a> <a href="/tags/1520/" title="周口" class="c1" target="_blank">周口</a> ,那么,在这段运动过程中,(已知:汽油的热值为 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/555/" title="河南" class="c1" target="_blank">河南</a> <a href="/tags/1163/" title="物理" class="c1" target="_blank">物理</a> <a href="/tags/1520/" title="周口" class="c1" target="_blank">周口</a> <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/555/" title="河南" class="c1" target="_blank">河南</a> <a href="/tags/1163/" title="物理" class="c1" target="_blank">物理</a> <a href="/tags/1520/" title="周口" class="c1" target="_blank">周口</a> )求:
 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/555/" title="河南" class="c1" target="_blank">河南</a> <a href="/tags/1163/" title="物理" class="c1" target="_blank">物理</a> <a href="/tags/1520/" title="周口" class="c1" target="_blank">周口</a>

1)汽油完全燃烧放出的热量是多少?

2)假设该车在这次行驶过程中,发动机排出的废气带走的能量占汽油完全燃烧放出的热量的 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/555/" title="河南" class="c1" target="_blank">河南</a> <a href="/tags/1163/" title="物理" class="c1" target="_blank">物理</a> <a href="/tags/1520/" title="周口" class="c1" target="_blank">周口</a> ,这些废气的能量全部被质量 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/555/" title="河南" class="c1" target="_blank">河南</a> <a href="/tags/1163/" title="物理" class="c1" target="_blank">物理</a> <a href="/tags/1520/" title="周口" class="c1" target="_blank">周口</a> 的水吸收,水升高的温度是多少?(水未沸腾)

3)如果汽油机的效率提高到 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/555/" title="河南" class="c1" target="_blank">河南</a> <a href="/tags/1163/" title="物理" class="c1" target="_blank">物理</a> <a href="/tags/1520/" title="周口" class="c1" target="_blank">周口</a> ,其他条件都不变,那么该车在这段路程中消耗的汽油是多少?

 

自入冬以来,越来越多的家庭开始使用电热取暖器.如图甲所示,这款电热取暖器有高温挡和低温挡两个挡位,额定电压为 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/555/" title="河南" class="c1" target="_blank">河南</a> <a href="/tags/1163/" title="物理" class="c1" target="_blank">物理</a> <a href="/tags/1520/" title="周口" class="c1" target="_blank">周口</a> ,高温挡的功率为 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/555/" title="河南" class="c1" target="_blank">河南</a> <a href="/tags/1163/" title="物理" class="c1" target="_blank">物理</a> <a href="/tags/1520/" title="周口" class="c1" target="_blank">周口</a> ,简化电路如图乙所示, <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/555/" title="河南" class="c1" target="_blank">河南</a> <a href="/tags/1163/" title="物理" class="c1" target="_blank">物理</a> <a href="/tags/1520/" title="周口" class="c1" target="_blank">周口</a> 的阻值为 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/555/" title="河南" class="c1" target="_blank">河南</a> <a href="/tags/1163/" title="物理" class="c1" target="_blank">物理</a> <a href="/tags/1520/" title="周口" class="c1" target="_blank">周口</a>
 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/555/" title="河南" class="c1" target="_blank">河南</a> <a href="/tags/1163/" title="物理" class="c1" target="_blank">物理</a> <a href="/tags/1520/" title="周口" class="c1" target="_blank">周口</a>  <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/555/" title="河南" class="c1" target="_blank">河南</a> <a href="/tags/1163/" title="物理" class="c1" target="_blank">物理</a> <a href="/tags/1520/" title="周口" class="c1" target="_blank">周口</a>

1)该电热取暖器是利用电流的________(选填“磁”或“热”)效应工作的;当 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/555/" title="河南" class="c1" target="_blank">河南</a> <a href="/tags/1163/" title="物理" class="c1" target="_blank">物理</a> <a href="/tags/1520/" title="周口" class="c1" target="_blank">周口</a> <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/555/" title="河南" class="c1" target="_blank">河南</a> <a href="/tags/1163/" title="物理" class="c1" target="_blank">物理</a> <a href="/tags/1520/" title="周口" class="c1" target="_blank">周口</a> 同时闭合时,电热取暖器处于________挡.

2)请计算电热取暖器处于低温挡时的功率和电热取暖器处于高温挡时通过电阻 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/555/" title="河南" class="c1" target="_blank">河南</a> <a href="/tags/1163/" title="物理" class="c1" target="_blank">物理</a> <a href="/tags/1520/" title="周口" class="c1" target="_blank">周口</a> 的电流.(除不尽时,计算结果保留一位小数)

3)在额定电压下,使用高温挡连续工作 <a href="/tags/54/" title="试卷" class="c1" target="_blank">试卷</a> <a href="/tags/255/" title="学年" class="c1" target="_blank">学年</a> <a href="/tags/555/" title="河南" class="c1" target="_blank">河南</a> <a href="/tags/1163/" title="物理" class="c1" target="_blank">物理</a> <a href="/tags/1520/" title="周口" class="c1" target="_blank">周口</a> ,电热取暖器产生的热量是多少焦耳?



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