(完整word版)高中：串联电路和并联电路经典练习(含答案),推荐文档.pdf

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1、串、并联电路的有关计算1电阻 R1与 R2并联在电路中，通过 R1与 R2的电流之比为12，则当 R1与 R2串联后接入电路中时，R1与 R2两端电压之比U1 U2为()A12 B 21 C14 D41 答案B 图 243 2如图 243 所示，R14，R29 ，R318.通电后经R1、R2和 R3的电流之比I1I2I3_，R1、R2和 R3两端的电压之比U1U2U3_.答案321233 电表的改装图 244 3一量程为100 A 的电流表，内阻为100 ，表盘刻度均匀，现串联一个9 900 的电阻将它改装成电压表，则该电压表的量程为_ V用它来测量电压时，表盘指针位置如图244 所示，此时电

2、压表的读数大小为_ V.答案10.8 解析4把表头 G 改装成大量程电流表时，下列说法正确的是()A改装原理为并联电阻能增大通过G 的电流B改装成电流表后，表头G 本身允许通过的最大电流并不改变C改装后，表头G 自身的电阻减小了D改装后使用时，表头G 本身的参量都不改变，整个并联电路允许通过的电流增大了答案BD 文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM

3、7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2

4、Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:

5、CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2

6、HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 Z

7、C2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编

8、码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O

9、2 HM7J4V5L9B6 ZC2Y2D6B3V6解析把表头G 改装成大量程的电流表时，只是并联了一个分流电阻，使整体并联电路允许通过的最大电流增大，但表头的各特征量都不变，故B、D 对，A、C 错(时间：60 分钟)题组一对串、并联电路的特点及有关计算1下列说法中正确的是()A一个电阻和一根理想导线并联，总电阻为零B并联电路任一支路的电阻都大于电路的总电阻C并联电路任一支路电阻增大(其他支路不变)，则总电阻也增大D并联电路任一支路电阻增大(其他支路不变)，则总电阻一定减小答案ABC 解析由并联电路的特点知：并联电路的总电阻比各支路中的任意一个分电阻的阻值都要小且任一支路电阻增大时(其他支路不

10、变)，总电阻也增大，所以A、B、C 对，D 错2将一只阻值为几千欧的电阻R1和一只阻值为千分之几欧的电阻R2串联起来，则总电阻()A很接近R1且略大于R1B很接近R1且略小于R1C很接近R2且略大于R2D很接近R2且略小于R2答案A 3电阻 R1、R2、R3串联在电路中，已知R110 ，R35.R1两端电压为6 V，R2两端电压为 12 V，则()A电路中的电流为0.6 A B电阻 R2的阻值为20 C三只电阻两端的总电压为21 V 文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V

11、6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F

12、6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5

13、L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B

14、3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V1

15、0F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4

16、V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D

17、6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6D电阻 R3两端的电压为4 V 答案ABC 解析电路中电流IU1R1610A0.6 A，A 对；R2阻值为 R2U2I120.620，B 对；三只电阻两端的总电压UI(R1R2R3)21 V，C 对；电阻 R3两端的电压U3IR30.65 V3 V，D 错4已知通过三个并联支路的电流之比I1I2I3123，则三个并联支路的电阻之比R1 R2R3为()A632 B2 36 C12 3 D231 答案A 解析三个并联支路的电压

18、相等，根据欧姆定律UIR 得，电流I 与电阻R 成反比电流之比 I1I2I3 123，则电阻之比R1R2R3632；故选 A.图 245 5如图 245 所示，图中1、2 分别为电阻R1、R2的电流随电压变化的关系图线，则()AR1和 R2串联后的总电阻的IU 图线应在区域BR1和 R2串联后的总电阻的IU 图线应在区域CR1和 R2并联后的总电阻的IU 图线应在区域DR1和 R2并联后的总电阻的IU 图线应在区域答案BC 题组二改装电表的原理6电流表的内阻是Rg 200，满刻度电流值是Ig500 A，现欲把此电流表改装成量程文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y

19、2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:C

20、Z8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 H

21、M7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC

22、2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码

23、:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2

24、 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6

25、ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6为 1 V 的电压表，正确的方法是()A应串联一个0.1 的电阻B应并联一个0.1 的电阻C应串联一个1 800 的电阻D应并联一个1 800 的电阻答案C 解析电流表改装成电压表，应串联电阻电阻两端的电压U U Ug 1 V 200500106 V 0.9 V，串联的电阻阻值为RU/Ig1 800.图 246 7如图 246 所

26、示电路，将两个相同的电流计分别改装成电流表A1(03 A)和电流表A2(00.6 A)，把这两个电流表并联接入电路中测量电流则下列说法中正确的是()AA1的指针半偏时，A2的指针也半偏BA1的指针还没有满偏，A2的指针已经满偏CA1的读数为 1 A 时，A2的读数为0.6 A DA1的读数为1 A 时，干路中的电流为1.2 A 答案AD 解析电流表是由电流计并联一个电阻改装而成，两电流表并联，所以两表头也并联，流过两表头的电流相等，A1的指针半偏时，A2的指针也半偏A 正确，B 错误；两电流表的内阻之比为15，则电流之比为5 1.A1的读数为1 A 时，A2的读数为0.2 A，干路中的电流为

27、1.2 AC 错误，D 正确；故选AD.8一个电流表由小量程的电流表G 与电阻 R 并联而成 若在使用中发现此电流表读数比准文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2

28、Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:

29、CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2

30、HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 Z

31、C2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编

32、码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O

33、2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6确值稍小些，下列采取的措施正确的是()A在 R 上串联一个比R 小得多的电阻B在 R 上串联一个比R 大得多的电阻C在 R 上并联一个比R

34、小得多的电阻D在 R 上并联一个比R 大得多的电阻答案A 解析电流表读数比准确值稍小些，是由于并联的电阻R 阻值偏小，而使流经小量程的电流表的电流偏小造成的，所以应该给电阻R 串联一个阻值比R 小的多的电阻，从而使通过G 的电流变大图 247 9如图 247 所示为一双量程电压表的示意图已知电流表G 的量程为0100 A，内阻为600，则图中串联的分压电阻R1_ ，R2_.答案4.941041.0105解析文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6

35、T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L

36、9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3

37、V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10

38、F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V

39、5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6

40、B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V

41、10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6题组三综合应用图 248 10如图 248 所示，变阻器的总电阻为R，连线电阻不计，当它的滑片P 从左端向右端移动时，A、B 间的电阻变化情况是()A减小B增大C先减小后增大D先增大后减小答案D 解析当滑片在最左端或者最右端时，AB 两点间的电阻均为0，在中间时，AB 间的电阻最大；当滑片在中间时，长度变为原来的二分之一，横截面积变为原来的一倍，则电阻变为原文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:C

42、Z8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 H

43、M7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC

44、2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码

45、:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2

46、 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6

47、ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档

48、编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6来的四分之一即电阻由0 增大到R4，再减小到0，最大值为R4.故选 D.11在图 249(a)所示电路中，V1、V2都是有 03 V 和 015 V 两个量程的电压表当闭合开关后，两个电压表指针偏转均如图(b)所示，则电阻R1、R2两端的电压分别为()图 249 A9.6 V,2.4 V B12 V,2.4 V C2.4 V,12 V D2.4 V,9.6

49、 V 答案A 解析由 b 图读出电压表V1、V2的读数分别为12 V，2.4 V，由 a图分析得知，电阻R1两端的电压等于两电压表读数之差，即为 12 V2.4 V9.6 V；电阻 R2两端的电压等于电压表V1的读数 2.4 V故选 A.图 2410 文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V1

50、0F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4V5L9B6 ZC2Y2D6B3V6文档编码:CZ8V10F6T8O2 HM7J4