当前位置:首页>学习笔记>【2026版高中物理粤教版必修三册学习笔记练透word培优讲义第四章作业30练习使用多用电表

【2026版高中物理粤教版必修三册学习笔记练透word培优讲义第四章作业30练习使用多用电表

  • 2026-03-30 17:19:00
【2026版高中物理粤教版必修三册学习笔记练透word培优讲义第四章作业30练习使用多用电表

[分值:80分]

1、24题每题6分,3题9分,5题10分,6题12分,7题15分,8题16分,共80分

1.(2023·佛山市高二期末)以下关于多用电表的说法中,正确的是(  )

A.在测电流和电压时,都必须把多用电表串联到电路中

B.在测电流时,若指针偏角过小,则需换更大的量程

C.多用电表作为欧姆表使用时,每次更换倍率都必须进行欧姆调零

D.多用电表作为欧姆表使用时,若指针偏角太大,则需选择更大的倍率进行测量

2.一个用满偏电流为3 mA的电流表改装成的欧姆表,调零后用它测量500 Ω的标准电阻时,指针恰好指在刻度盘的正中间。用它测量一个未知电阻时,指针指在1 mA处,则被测电阻的阻值为(  )

A.1 000 ΩB.5 000 Ω

C.1 500 ΩD.2 000 Ω

3.(9分)如图为一正在测量中的多用电表表盘:

(1)(3分)如果是用直流10 V挡测量电压,则读数为________ V;

(2)(3分)如果是用直流5 mA挡测量电流,则读数为________ mA;

(3)(3分)如果是用“×100挡测量电阻,则读数为________ Ω。

4.(2023·广州华南师大附中高二期末)如图是一个多用电表的简化电路图。S为单刀多掷开关,通过操作开关,接线柱可以接通1、2、3、4或5。下列说法正确的是(  )

A.当S接1或2时,测量的是电流,接1时的量程小

B.当S接3时,测量的是电阻,其中A是红表笔

C.当S接3时,测量的电阻越大,指针偏角越大

D.当S接4或5时,测量的是电压,接4和接5时的最大测量值之比为R3(R3R4)

5.(多选)如图所示为简易欧姆表的原理示意图,其中电流表的满偏电流Ig =300 μA,内阻Rg =100 Ω,可变电阻R的最大阻值为10kΩ,电池的电动势E=1.5 V,内阻r =0.5 Ω,下列说法正确的是(  )

A.与接线柱A相连的是红表笔

B.按正确使用方法测量电阻Rx时,指针指在刻度盘的正中央,则Rx =10 kΩ

C.若该欧姆表使用一段时间后,电池电动势变小,但此表仍能调零,测量Rx的阻值时,则测量值比真实值大

D.测量电阻时,如果指针偏转角度过大,应将选择开关拨至倍率较小的挡位,重新欧姆调零后测量

6.(12分)(2024·广州市高二月考)如图甲所示为在练习使用多用电表实验中某多用电表示意图;如图乙所示为欧姆表测电阻Rx的原理示意图;用多用电表直接测量电阻约为1 300 Ω的电灯泡的电阻,其电路连接图如图丙所示,回答下列问题:

(1)(4分)对甲图,在测量电阻前需要将红、黑表笔短接,进行________调零,需要调整________(选填A”“BC)。

(2)(4分)对乙图,若电源的电动势为E,满偏电流为Im,当接上待测电阻Rx后,表头的示数为I,则欧姆表的内阻为________,待测电阻Rx的阻值为________。

(3)(4分)对丙图,实验时选择开关所处的挡位是____________(选填“×10”“×100“×1 000),灯泡阻值的读数为________ Ω。

7.(15分)(2024·汕头市高二期末)如图甲所示,4节干电池串联,小灯泡A和B的规格均为5 V 0.5 A,合上开关,无论怎样移动滑动变阻器的滑片,A和B都不亮。

(1)(3分)现用多用电表的电压挡检查故障,则选择开关置于下列________量程较为合适;

A.2.5 VB.10 V

C.50 VD.250 V

(2)(3分)测得ab间电压为5.8 V,cd间电压为0,则故障可能是________;

A.A灯丝断开

B.B灯丝断开

C.B灯短路

D.4节干电池电压太低,无法使两灯亮起

(3)(9分)将B灯泡从电路中拆除,将欧姆表打到电阻“×1挡,欧姆表经过欧姆调零后,测量灯泡的电阻,某次测量结果如图乙所示,读数为________ Ω,根据小灯泡的规格计算出电阻为________ Ω,它不等于测量值,原因是灯泡未正常工作时,温度低,其电阻________(选填)。

8.(16分)(2024·广州市高二期末)某同学手边没有电流表,有一个电压表(量程0~5 V,内阻为5×103 Ω),电池(电动势为8 V、内阻为10 Ω)、总电阻足够大的滑动变阻器R0,他利用以上器材制成一个可以直接测量电阻的欧姆表,如图甲所示。图乙是电压表的刻度盘。

(1)(4分)图甲中,d为__________(选填)表笔。

通过网盘分享的文件:word讲义

链接: https://pan.baidu.com/s/1JYC12PUPGPNazMlYWE5hgQ?pwd=4321 提取码: 4321 

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  1. CONNECT:[ UseTime:0.000397s ] mysql:host=127.0.0.1;port=3306;dbname=no_67808;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000517s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000264s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000280s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000477s ]
  6. SELECT * FROM `set` [ RunTime:0.000208s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000573s ]
  8. SELECT * FROM `article` WHERE `id` = 478689 LIMIT 1 [ RunTime:0.006556s ]
  9. UPDATE `article` SET `lasttime` = 1774955211 WHERE `id` = 478689 [ RunTime:0.010447s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 65 LIMIT 1 [ RunTime:0.000291s ]
  11. SELECT * FROM `article` WHERE `id` < 478689 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000448s ]
  12. SELECT * FROM `article` WHERE `id` > 478689 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000376s ]
  13. SELECT * FROM `article` WHERE `id` < 478689 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.002230s ]
  14. SELECT * FROM `article` WHERE `id` < 478689 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.008155s ]
  15. SELECT * FROM `article` WHERE `id` < 478689 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.012144s ]
0.173165s