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29安阻法和伏阻法测电池的电动势和内阻

【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29安阻法和伏阻法测电池的电动势和内阻

  • 2026-04-04 00:09:19
【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29安阻法和伏阻法测电池的电动势和内阻

29安阻法和伏阻法测电池的电动势和内阻

[分值:70分]

1题6分,2题12分,3、4每题16分,5题20分,共70分

1.(多选)利用电流表和电压表测定一节干电池的电动势和内阻,要求尽量减小实验误差。在实验中,待测电池、开关和导线配合下列哪组仪器,可以达到测定目的(  )

A.一只电流表和一个滑动变阻器

B.一只电流表和一只电压表

C.一只电流表和一个电阻箱

D.一只电压表和一个电阻箱

2.(12分)(2024·珠海市高二期末)某同学利用电阻箱和内阻很大的电压表测定干电池的电动势和内阻,使用的器材还包括定值电阻(R0=5 Ω)一个,开关两个,导线若干,实验原理图如图(a)。

(1)(3分)在图(b)的实物图中,已正确连接了部分电路,请完成余下电路的连接。

(2)(3分)请完成下列主要实验步骤:

检查并调节电压表指针指零;调节电阻箱,示数如图(c)所示,读得电阻值是________;

将开关S1闭合,开关S2断开,电压表的示数是1.48 V;

将开关S2闭合,电压表的示数是1.14 V;断开开关S1

(3)(3分)使用测得的数据,计算出干电池的内阻是________(计算结果保留二位有效数字)。

(4)(3分)由于所用电压表不是理想电压表,所以测得的电动势比实际值偏________(填)。

3.(16分)(2024·东莞市高二期中)如图甲所示为某同学测量电源的电动势和内阻的电路图。其中包括电源E,开关S1和S2,电阻箱R,电流表A,保护电阻Rx。该同学进行了如下实验步骤:

(1)(4分)将电阻箱的阻值调到合适的数值,闭合S1、S2,读出电流表示数为I,电阻箱读数为9.5 Ω;断开S2,调节电阻箱的阻值,使电流表示数仍为I,此时电阻箱读数为4.5 Ω。则保护电阻的阻值Rx=________ Ω。(结果保留两位有效数字)

(2)(8分)S2断开,S1闭合,调节R,得到多组RI的数值,并画出1IR图像如图乙所示,由图像可得,电源电动势E=________ V,内阻r=________ Ω。(结果均保留两位有效数字)

(3)(4分)本实验中,电源内阻的测量值__________(选填大于小于)真实值。

4.(16分)图(a)是某实验小组测量电源的电动势和内阻以及测量定值电阻Rx阻值的实验电路,其中的电压表可视为理想电表。

他们的实验操作步骤为:先断开开关S2、闭合开关S1,调节电阻箱的阻值,记下多组电压表的示数U和对应电阻箱的示数R再闭合S2,多次调节电阻箱的阻值,记下多组UR

根据实验测得的数据,他们作出了图(b)所示的1U1R图像,其中两条直线的斜率分别为k1k2,在纵轴上的截距均为a

(1)(4分)S1、S2都闭合时的1U1R图线是________(填“Ⅰ”“Ⅱ”)。

(2)(12分)根据1U1R图像可得,电源的电动势E=________、内阻r=________;定值电阻的阻值Rx=________。

5.(20分)(2023·广东省高二联考)某课外活动小组用铜片、铝片和自来水制作了由多个自来水电池构成的电池组。为了测量电池组的电动势E和内阻r,他们选用数字电压表(内阻大于10 MΩ)、电阻箱(0~9 999 Ω)以及开关与该电池组连接成电路进行实验。

(1)(5分)请在图甲的方框中画出实验电路图。

(2)(10分)按照设计的电路图连接电路后,调节电阻箱接入电路的阻值R,并同时记录数字电压表的读数U。以1U为纵轴、1R为横轴建立直角坐标系,描

出数据点,得到图乙所示的图线。已知图线在纵轴上的截距为b,斜率为k,由此可以求得电池组的电动势E=__________,内阻r=__________。(用bk表示)

(3)(5分)该小组的同学想用上面数字电压表和电阻箱探究某光伏电池的特性。他们通过查阅资料知道,光伏电池在特定光照条件下的伏安特性曲线如图丙所示,则他们得到的UR图像可能是下列选项中的__________。

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:0.000405s ] mysql:host=127.0.0.1;port=3306;dbname=no_67808;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000580s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000312s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000836s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000498s ]
  6. SELECT * FROM `set` [ RunTime:0.002056s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000595s ]
  8. SELECT * FROM `article` WHERE `id` = 479258 LIMIT 1 [ RunTime:0.004580s ]
  9. UPDATE `article` SET `lasttime` = 1775247674 WHERE `id` = 479258 [ RunTime:0.000628s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 65 LIMIT 1 [ RunTime:0.001431s ]
  11. SELECT * FROM `article` WHERE `id` < 479258 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.012645s ]
  12. SELECT * FROM `article` WHERE `id` > 479258 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.023402s ]
  13. SELECT * FROM `article` WHERE `id` < 479258 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.019226s ]
  14. SELECT * FROM `article` WHERE `id` < 479258 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.030164s ]
  15. SELECT * FROM `article` WHERE `id` < 479258 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.029729s ]
0.204891s