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2022年-2018学年初三第一学期物理期末质量检测一套 .pdf

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1、最新 2017-2018学年初三第一学期物理期末质量检测一套（90 分钟，满分：100 分）一、选择题1、关于内能及其利用，下列说法正确的是A.温度高的物体内能一定大B做功和热传递都可以改变物体的内能C比热容跟物体吸收或放出的热量有关D热机的做功冲程是将机械能转化为内能2、如图所示是汽油机工作时各种冲程的示意图，其中表示做功冲程的是（）ABCD3、一电路中有两灯泡都在工作，用电压表测出灯泡两端的电压相等，则说法正确的是A.一定是并联B一定是串联C两灯泡规格一定相同D无法确定4、两只小灯泡串联在同一电源上，发现甲灯较亮，乙灯较暗，则下列说法正确的是（）A甲灯中电流较大B乙灯中电流较大C通过两灯的

2、电流一样大D条件不足，无法判断5、20XX年 4 月，溧阳赵先生家中井水突然变热至 47，让人恐慌维修电工访谈得知：水井内有抽水泵（电动机），原来可以正常工作，井水温度也正常；自从水泵坏了之后，开关S就一直断开，但井水温度从此明显变高，电工检测发现：开关处确实断开，但水泵和井水都带电由此可知，赵先生家水泵电路的实际连接方式为图中的（）ABCD6、如图所示的电路中，电源电压保持不变，闭合开关 S，将滑动变阻器的滑片P向左移动，下列说法正确的是（）A电流表 A1的示数变小，电流变A2的示数变大B电流表 A1的示数和电流表A2的示数同时变大C电压表的示数变大，电流表A1 的示数变小文档编码:CU1O

3、6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8

4、ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O

5、6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8

6、ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O

7、6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8

8、ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O

9、6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4D电压表的示数不变，电流表A2 的示数变小7、某校物理兴趣小组设计了一个电子身高测量仪如图的四个电路中，R0是定值电阻，R是滑动变阻器，电源电压不变，滑片会随身高上下平移能够实现身高越高，电压表或电流表示数越大的电路是8、用同种材料制成两段长度相等，横截面积不同的圆柱形导体，A 比 B的横截面积大，如图8 所示，将它们串联在电路中，通过的电流关系是AIAIB BIAIB CI

10、A=IB D无法确定9、如图所示电路的电源电压保持不变，将滑动变阻器的滑片 P从中点移到 b 端的过程中A.灯泡变暗B.电压表示数变大C.电流表示数变小D.电路总功率变小10、有两只分别标有”6V 3W“和”9V 3W“的小灯泡 L1、L2，不考虑温度对灯丝电阻的影响，下列说法正确的是（）AL1和 L2正常工作时的电流一样大文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2

11、HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R

12、8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2

13、HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R

14、8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2

15、HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R

16、8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4BL1和 L2串联在一起同时使用时

17、，两灯一样亮CL1和 L2并联在一起同时使用时，两灯消耗的功率一样大D将 L1串联在一个 12的电阻，接在电源电压为 12V的电路中，L1也能正常发光11、如图所示，电源电压为4.5V，电压表量程为“03V”，电流表量程为“00.6A”，滑动变阻器规格为“101A”，小灯泡 L标有“2.5V 1.25W”（灯丝电阻不变）。在保证小灯泡 L电流不超出额定电流的情况下，移动滑动变阻器的滑片，下列说法正确的是小灯泡的额定电流是0.6A 滑动变阻器连入电路的阻值变化范围是410电压表示数变化范围是03V 电流表示数变化范围是0.30.5A A只有、正确B只有、正确C只有、正确D只有、正确文档编码:CU

18、1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z

19、8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU

20、1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z

21、8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU

22、1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z

23、8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU

24、1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D412、某同学用同种材料制成a、b 两种电热丝，a的横截面积是 b 的两倍，b 的长度是 a 的 2 倍，把两个电热丝接在家庭电路中，烧开同一壶水，两次所用的时间（）Ata=tb Bta=2tb Cta=tb Dta=tb 13、下列做法中，符合安全用电常识的是A、将家用电器的金属外壳接地线B、使用绝缘皮破损的电线供电C、用湿毛巾擦拭正在发光的电灯D、在高压输电线的附近放风

25、筝14、在实际生活中电池本身是有电阻的，因此，实际的电池可以等效为一个没有电阻的理想电池和一个阻值一定的电阻串联而成在如图甲所示电路中，电源由几个相同的铅蓄电池组成（每节电压为 2V）合上开关 S，变阻器的滑片从A 端滑到 B端的过程中，电路中的一些物理量的变化，如图乙、丙、丁所示，图乙表示电压表示数与电流表示数的关系关系；图丙表示滑动变阻器的功率跟电压表示数的关系；图丁表示铅蓄电池输出电能的效率与变阻器接入电路电阻大小的关系，b 点时最大不计电表、导线对电路的影响，则（）文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C

26、6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文

27、档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C

28、6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文

29、档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C

30、6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文

31、档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C

32、6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4A变阻器的总电阻为6 B铅蓄电池的节数为 2 节C每节铅蓄电池的阻值为1 D以上都不对15、在图所示的电路中，闭合开关s，让开关 S1 和 S2 断开，调节滑动变阻器的滑片P 使其位于变阻器的最左端口处，此时灯泡 L 恰好正常发光，电流表A 和电压表V 均有示数。已知变阻器的总电阻大于灯泡 L 的电阻，以下判断正确的是（）A.若保持 S1 和 S2 断开，让P 缓慢向右滑动，灯泡 L 有可能被烧毁B.若保持 P 在 a 处不动，S1 仍断开，闭合S2 后，A 表和 V 表示数均

33、不变C.若保持 P 在 a 处不动，S1 仍断开，闭合S2 后，A 表和 V 表示数将变大D.若保挣 S2 断开，将P 移至变阻器最右端b，再闭合 S1 后，A 表和 V 表均仍有示数16、如图所示，电源电压U=8V保持不变，小灯泡上标有“6V，4W”字样，电阻 R2=30。闭合电键后，若滑动变阻器R1的滑动片 P在离 b 端 1/4 处时，小灯泡的实际功率为1W。为了使电键闭合后，滑动片左右移动时，灯泡两端电压不超过额定电压，变阻器 R1的阻值（有电流部分）的变化范围是（）文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4

34、C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4

35、文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4

36、C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4

37、文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4

38、C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4

39、文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4

40、C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4A.0 40 B.3.4 40 C.7.5 30 D.1030二、填空题17、用铝壶烧开水，壶中的水蒸气将壶盖顶起来，这是消耗水蒸气的能对外做功，将水蒸气的能转化成壶盖的能。18、在图 7 的电路中，电源电压恒为12V，定值电阻 R0=50，滑动变阻器的最大阻值为50，小灯泡上标有“6V”字样，不考虑灯丝电阻变化。若开关S、S1、S2都闭合，当滑片P在 b 端时，电流表示数为A。若开关 S闭合，S1、S2都断开，当滑动变阻器接入电路的阻值为20时，电流表的示数为 0.4A，则

41、小灯泡的额定功率是W。19、家庭使用的白炽灯是根据电流的_效应工作的。灯丝做成螺旋状是为了 _(选填“增大”或“减少”)散热，以便更好地发光。20、如图 12 是安装了漏电保护器的家庭电路当漏电保护器检测到通过图中A、B 两处的电流不相等（即发生漏电）时，会迅速切断电路，从而起到保护作用当家电维修人员在图中C处不慎触电时，漏电文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2

42、 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8

43、R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2

44、 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8

45、R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2

46、 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8

47、R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4保护器（填“会”或“不会”）切断

48、电路若人体电阻为 10k，触电时通过人体的电流为mA。21、如图所示，电源两端电压恒定不变，灯泡 L1、L2的铭牌可能是“1.5V0.2A”、“3.0V0.3A”、“6.0V 0.5A”把 AB两个接线柱接在电源两端，调节滑动变阻器的滑片 P到某点 a，使滑动变阻器接入电路的电阻为 Ra时，电压表的示数为6V，灯泡 L1恰好正常发光；把 AD两个接线柱接在同一电源两端，调节滑动变阻器的滑片 P到另一点 b，使滑动变阻器接入电路的电阻为 Rb时（滑动变阻器上的a、b 两点图中未标出），电压表的示数为5.4V，灯泡 L2恰好正常发光，此时灯泡 L1的实际电压为其额定电压的0.6 倍则两个状态中滑动

49、变阻器接入电路的阻值之比Ra：Rb=（灯丝的电阻保持不变）三、作图题22、图中虚线框内是一台灯旋钮开关的内部电路简图，通过它可控制台灯的通断和亮度请将电路图连接完整，使其符合安全用电的原则文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:C

50、U1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4Z8 ZM6R2D8R8D4文档编码:CU1O6U8Z1F2 HE4C6J4O4

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