![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7cd9005c54db44eff13c03b1c285da8.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/2/5aea7543-2a66-44b9-954a-e3a5d4d7e09a.png?resizew=279)
(1)用螺旋测微器测量金属丝的直径为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c02bc0c74292b1e8f395f90935d3174.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21f3bf70722b22983c120d008d097602.png)
(2)用伏安法测金属丝的电阻
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce2581ae160692cd7e2686226fe5e2c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b26d0e154ef213ebe194b8b5e519f13.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9db144c76e36b0c4d950698b2bbc39f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d0210026c88ec845716829b24ecc77f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/951f5dfc2ee88b950c0a4322d9236ce4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4de646d16cef6636f0a520fe1f862922.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6699c896d7394a071917fe3922f3864f.png)
次数 | 1 | 2 | 3 | 4 | 5 |
![]() | 0.20 | 0.59 | 1.00 | 1.50 | 2.20 |
![]() | 0.05 | 0.15 | 0.24 | 0.38 | 0.54 |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce2581ae160692cd7e2686226fe5e2c6.png)
A.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/2/30e0e6dd-5657-4ba5-88c6-822fba5927a1.png?resizew=148)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/2/726dfd5d-2ceb-4df8-afd8-9a7d8dcf07d9.png?resizew=152)
C.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/2/14dd24cc-612c-4744-a56a-ac807723e5b3.png?resizew=146)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/2/10db00fd-f7d4-4f2f-871b-4635f905e325.png?resizew=154)
(3)关于实验中产生的误差,下列说法中正确的是
A.用螺旋测微器测量金属电阻丝直径时,读数引起的误差属于系统误差
B.用
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e43cca5751eff3d24b64cb51006d6d7.png)
C.由于电流表或电压表内阻的影响会使本次实验电阻率测量值大于真实值
(4)请在图中描绘出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e43cca5751eff3d24b64cb51006d6d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3e89b64cd9b833d677519b0e771ad03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0047f659c182291c84c224df6b5e993f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/2/1c2b4640-98df-44e1-928b-d1ca32be7441.png?resizew=253)
(5)多次测量金属丝直径,平均值为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90abfa7c6e2cb4ae59c019fac175b78d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04bd482c8aa483cd59b4c22636960fe0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/442257676ca155e57db46b636bd32845.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/29/709e44cd-9b74-491a-b866-d8484da76d9a.png?resizew=321)
金属丝的电阻大约为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec9333c48b31195c71f539b972a98d68.png)
直流电源:电源电压
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41d8b94b084bbad77f6571673d8ccc19.png)
电流表
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ae396d2cf4277c0a9b542c50c9797e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b5c929172bbfc21741fa7ef1f53b7bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d44d033bbc7752424cc86ae17a748e4.png)
电流表
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16dde22198470685960ad27c5ed51aef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/881cf9cbfbbf7bb84f8ca2f3db9ca2f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/159faf4a64cab518863177238d345ff7.png)
电压表
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7365bea3ff759954688d89542e33679c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a6bb65878785532d817f8fd11a9ef3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/951f5dfc2ee88b950c0a4322d9236ce4.png)
滑动变阻器
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ffad6f2a53419f27e944abeca546a208.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9fd79de5050f5960c9478154c48e830.png)
滑动变阻器
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c89d69690afac14573ca7ade0445551a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6e278c32ede0c61f56cb6c0dc50dc29.png)
开关、导线等。
(1)从甲中读出金属丝的直径
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a6d85799453899836bc34ad276ec80e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21f3bf70722b22983c120d008d097602.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a6d85799453899836bc34ad276ec80e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21f3bf70722b22983c120d008d097602.png)
(2)在所给的器材中,应选的电流表是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd995178601c2ad7b40f973d268c7bb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04582116cd765fcc5a52f44279ad6c94.png)
(3)根据题目要求,将下面实验电路图补充完整
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/29/7c84554e-fce7-423b-801f-687e474b703e.png?resizew=121)
(4)用待测金属丝的电阻
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce2581ae160692cd7e2686226fe5e2c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c88d9142df6ba8e43c1a93bd04a1362.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b30db97c39edcede2f0e7d4e075fecec.png)
(5)实验测出的金属丝的电阻为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80c2b1f221e3b68fc52e7484210e1515.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9942091e83e1d59af01f499a0caee212.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86ebba6ed1add0fe647c0226614b9290.png)
3 . 在做测定金属的电阻率的实验中,若待测电阻丝的电阻约为5Ω,要求测量结果尽量准确,备有以下器材:
A.电池组(3V,内阻r=1Ω)
B.电流表(0~3A,内阻约0.0125Ω)
C.电流表(0~0.6A,内阻约0.125Ω)
D.电压表(0~3V,内阻约4kΩ)
E.电压表(0~15V,内阻约15kΩ)
F.滑动变阻器(0~20Ω,允许最大电流1A)
G.滑动变阻器(0~2000Ω,允许最大电流0.3A)
H.开关、导线
(1)上述器材中应选用的是
(2)在本实验中,某同学用游标卡尺和螺旋测微器测该电阻丝的长度L和直径d。
(3)实验电路应采用如图所示哪个
(4)接通开关,改变滑动变阻器滑片P的位置。并记录对应的电流表示数I,电压表示数U。
(5)本实验所用电路,产生误差的主要原因是
A.电流表测量值小于流经Rx的电流值
B.电流表测量值大于流经Rx的电流值
C.电压表测量值小于Rx两端的电压值
D.电压表测量值大于Rx两端的电压值
(6)用实验过程中测量的物理量对应的字母表示电阻率,则该圆柱复合材料电阻率的表达式为=
A. 电源(电动势3V,内阻可忽略)
B. 电流表(量程0.6A,内阻约为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f66de503c8055c43644b847eba74b50f.png)
D. 电压表(量程3V,内阻约
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ad53b547e11f3e4719a70a4b9564cc8.png)
E. 滑动变阻器(
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e064957bcb1884fc847ca9bd4d3ed91.png)
F. 滑动变阻器(
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70be1a5dbb49893e73f8cf78eaaebd52.png)
G. 开关、导线若干
小组同学将器材按图(甲)连接后开始实验,回答下列问题:
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/30/55c2a3fb-846e-474c-9717-06c93e6ba7ff.png?resizew=345)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/30/77ca4cfd-2e5d-4906-8e1e-2e82f5c11139.png?resizew=160)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/30/fdc996e7-230f-4455-9447-a36854c4c7ad.png?resizew=266)
(1)图甲电路中滑动变阻器应选择
(2)测量过程中,某同学拍摄了一张电流表表盘的读数,如图乙所示,其读数为
(3)用螺旋测微器测材料的直径,如图丙所示,该材料的直径为
(4)根据实验数据,小组同学在坐标纸上作出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e43cca5751eff3d24b64cb51006d6d7.png)
A.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa7104aff5c0b8147edfd442e5b4b936.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abce0383bb1cee6660ec6f42b0a0e044.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fcc31e765e16be8f0b5d4cc36181c1b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab3757526479c97a46034d5c78f511e8.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/21/c94da778-3631-4680-95dd-3f2089a263e0.png?resizew=479)
(1)小李用游标卡尺测量2B铅笔芯的直径,如图甲所示,其读数d=
(2)小李采用了如图所示的电流表外接法进行实验,想增加电压和电流的调节范围,多测几组数据,请在相应位置添加或删除导线,将电路连接完整
(3)连接好电路后小李根据测得的数据画出U-I图线,然后又将电流表改为内接,在同一个坐标系画出了另一条不一样的U-I图线,在图中将两条U-I图线画出
(4)通过图像分析可知,采用电流表
(5)根据以上测量,可以计算出铅笔芯的电阻率为
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/10/4d013748-d6c2-450d-b277-ac8103bfd527.png?resizew=328)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/10/590f61d4-d4a2-4a0a-abe1-819d2e928cc7.png?resizew=356)
(1)实验时,闭合S1,S2置于位置1,改变滑动变阻器滑动触头P的位置,电流表示数有明显变化,电压表没有示数;再将S2置于位置2,情况相同。经检查,电路中所有元件完好,则导线a、b、c、d、e、f、g中出现断路故障的是
(2)修复故障后,用电流表内接法测量Rx的阻值时应该将S2置于位置
(3)用电流表内、外接法得到Rx的电阻率随浓度变化的两条曲线如图乙所示(不计由于通电导致的化学变化)。某次用电流表内接法测得Rx的阻值为2800Ω,Rx的横截面积为20cm²,长度为20cm,则其电阻率为
(1)用螺旋测微器测合金丝的直径d,如图甲所示,其示数为
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/29/d59b84ff-6b3b-4e3b-a43e-db716ac85bc4.png?resizew=108)
(2)用多用电表测合金丝的电阻,选用欧姆挡“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eebdb972b35aaa81a6662aaf8db1c282.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cffa35373ec4e4684107b42adb7a5161.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/29/e9cf7337-6237-4938-80a5-22eaed990015.png?resizew=305)
(3)用如图丙所示电路测量合金丝电阻,用毫米刻度尺测出合金丝
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/29/647c274a-9f7d-43b8-ac40-0860db542fba.png?resizew=371)
(4)实验过程中,调节滑动变阻器,测出多组电压U和电流I的数据,作出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e43cca5751eff3d24b64cb51006d6d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b30db97c39edcede2f0e7d4e075fecec.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/29/ddf60edb-1d17-4b7f-933a-fe2acc373373.png?resizew=124)
(5)下列做法有助于减小实验误差的是
A. 测合金丝直径时,只在中间位置测一次 B. 使用大电流且通电较长时间后进行电表读数
C. 直接使用多用电表的电阻测量值计算电阻率 D. 测3次不同长度合金丝的电阻率,求出平均值
(1)在使用多用电表测电阻时,以下说法正确的是
A.每换一次挡位,不必重新进行欧姆调零
B.指针在刻度盘中央附近误差较小
C.在外电路中,电流从红表笔流出经被测电阻再由黑表笔流入多用电表
D.测量时,若指针偏角较小,说明这个电阻的阻值较大,应换倍率较大的挡位来测量
(2)用多用电表的欧姆挡“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf3a1e976dc7ccea4600a8ad1121760.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cffa35373ec4e4684107b42adb7a5161.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/17/8599cabe-6159-458b-9790-9d490363029e.png?resizew=258)
(3)用螺旋测微器测量金属丝的直径,测量的示数如图乙所示,则金属丝直径
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c98c59cd4749afdd21e73529fc84323.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21f3bf70722b22983c120d008d097602.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/17/67736edb-65a0-42a4-adc9-50dcad2408f7.png?resizew=341)
(4)实验室提供的器材如下:
A.待测金属丝(电阻
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce2581ae160692cd7e2686226fe5e2c6.png)
B.电流表
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/024e2379c58191758f8bd7602a6bcb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db586f2c37b26089713ff02346e6d0d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d0210026c88ec845716829b24ecc77f.png)
C.电流表
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b34a75c2a392f235c5f07b91d9fb58d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc9d1ce44013cb5ba7c6038dabc2803d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d446865b9ad8655c7450527d3315f8fc.png)
D.电压表
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48fade4e14bf5845ff14f9e95bb6bfef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b26d0e154ef213ebe194b8b5e519f13.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/951f5dfc2ee88b950c0a4322d9236ce4.png)
E.电压表
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b40f1d184152aa3954752ed70e7d1612.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/deb4bcbd9cbba7000bf5154da782db51.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dfd13d3c461ca6927427425f8e7be74c.png)
F.滑动变阻器
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4de646d16cef6636f0a520fe1f862922.png)
G.电源
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3e0a6f3b59a4cca5721ec634408d197.png)
H.开关、若干导线。
实验中电流表应选
(5)根据所选用的实验器材,为了尽量减小实验误差,请设计电路并在图丙虚线框中将电路图补充完整。
(6)若通过测量可知,金属丝接入电路的长度为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c02bc0c74292b1e8f395f90935d3174.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e105760638b22b26ff8bec4354255e4c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b52b4f24969673c863b5aff4fb6751ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b30db97c39edcede2f0e7d4e075fecec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9871f2a312aaf3a19b40e4fb1a7693b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64d7fe422e1ff6f96d365e8c08c32eea.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/16/341861a5-5d09-403a-a0db-5999126b6c13.png?resizew=570)
(1)用螺旋测微器测量金属管线的外径,示数如图乙所示,金属管线的外径为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21f3bf70722b22983c120d008d097602.png)
(2)实验室使用如下器材:电流表(量程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db586f2c37b26089713ff02346e6d0d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/910928687da37388715dd531939fbfed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b26d0e154ef213ebe194b8b5e519f13.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4df7f95cc0b9be6dbe2d4e73fcb336f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ceb30a450857454e6822c9a16c7d573d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3088c2099211295de775ee33dd1d03fc.png)
(3)金属管线样品材料的电阻率为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/171102a883b22fe6ca578efc8926f5b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c02bc0c74292b1e8f395f90935d3174.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/447a9718a502491b47072ce013c26a2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7fb9baada5e5b1454b39fdb5e8b43ef.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/16/bb4bae64-6685-4aaa-bd56-653565f7bbed.png?resizew=246)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/16/9f3b2854-a8e2-4e7b-bcb6-1abea72c65f1.png?resizew=192)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/16/722de658-e105-4a63-8bd2-3028f687ef91.png?resizew=149)
(1)电流表的量程应选择
(2)用笔画线代替导线,把电流表和滑动变阻器连接好
(3)若该金属丝的直径用螺旋测微器测量的示数如丙图所示,则读数为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c98c59cd4749afdd21e73529fc84323.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b30db97c39edcede2f0e7d4e075fecec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9942091e83e1d59af01f499a0caee212.png)