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第10章实验11 测量电源的电动势和内阻_4.2025物理总复习_2024年新高考资料_1.2024一轮复习_2024年高考物理一轮复习讲义(新人教版)_学生版在此文件夹_一轮复习85练

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第10章实验11 测量电源的电动势和内阻_4.2025物理总复习_2024年新高考资料_1.2024一轮复习_2024年高考物理一轮复习讲义(新人教版)_学生版在此文件夹_一轮复习85练
第10章实验11 测量电源的电动势和内阻_4.2025物理总复习_2024年新高考资料_1.2024一轮复习_2024年高考物理一轮复习讲义(新人教版)_学生版在此文件夹_一轮复习85练
第10章实验11 测量电源的电动势和内阻_4.2025物理总复习_2024年新高考资料_1.2024一轮复习_2024年高考物理一轮复习讲义(新人教版)_学生版在此文件夹_一轮复习85练
第10章实验11 测量电源的电动势和内阻_4.2025物理总复习_2024年新高考资料_1.2024一轮复习_2024年高考物理一轮复习讲义(新人教版)_学生版在此文件夹_一轮复习85练

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1.(2023·山东济南市模拟)某实验小组利用电流表和电压表测定一节干电池的电动势和内阻, 实验器材如下: 干电池一节(电动势约为1.5 V,内阻约为0.5 Ω); 电压表V(量程为0~3 V,内阻约为3 kΩ); 电流表A(量程为0~0.6 A,内阻约为0.2 Ω); 滑动变阻器(最大阻值为20 Ω); 开关、导线若干. (1)实验电路图选择______(选填“甲”或“乙”). (2)用笔画线代替导线,将图中的器材连成实验电路. (3)完成实验后,某同学利用图像分析由电表内阻引起的实验误差.在下图中,实线是根据 实验数据描点作图得到的U-I图像;虚线是该电源真实的路端电压 U随真实的干路电流I 变化的U-I图像.本次实验分析误差的U-I图像是________. (4)为减小电表内阻引起的实验误差,在电表量程不变的情况下,可以采取的措施是 ________. A.换用内阻更小的电流表 B.换用内阻更大的电流表 C.换用内阻更小的电压表 D.换用内阻更大的电压表2.(2021·天津卷·10)随着智能手机的广泛应用,充电宝成为手机及时充电的一种重要选择. 充电宝可以视为与电池一样的直流电源.一充电宝的电动势约为 5 V,内阻很小,最大放电 电流为2 A,某实验小组测定它的电动势和内阻.他们剥开充电宝连接线的外绝缘层,里面 有四根导线,红导线为充电宝的正极,黑导线为充电宝的负极,其余两根导线空置不用,另 有滑动变阻器R用于改变电路中的电流,定值电阻R =3 Ω,两只数字多用电表M、N,两 0 表均为理想电表,并与开关S连成如图所示电路. (1)图中测量电流的电表是________,测量电压的电表是________.(均填写字母“M”或 “N”) (2)调节滑动变阻器,测得多组I、U数据,记录如下表,其中只有一个数据记录有误,审视 记录的数据,可以发现表中第________次的记录数据有误.(填测量次数的序号) 次数 1 2 3 4 5 6 7 电流I/A 0.299 0.477 0.684 0.877 1.065 1.281 1.516 电压U/V 4.970 4.952 4.932 4.942 4.894 4.872 4.848 (3)电路中接入R 可以达到下列哪个效果______.(填选项前的字母) 0 A.使测电流的电表读数变化明显 B.为了更准确地测量充电宝内阻 C.避免使充电宝的放电电流过大 D.减小测量电压的电表分流作用 3.为了同时测量一电源的电动势E和内阻r,以及未知阻值的电阻R,某同学设计了一电 x 路.实验室提供的器材如下:待测电源、待测电阻、电阻箱一个、内阻很大的电压表一只、 开关两个、导线若干. (1)为实现上述目的,请完善图甲实物图连接; (2)该同学实验的主要步骤有:①闭合S、S,多次调节电阻箱阻值,并记录其阻值及对应的电压表的示数; 1 2 ②保持S 闭合,断开S,多次调节电阻箱阻值,并记录其阻值及对应的电压表的示数; 1 2 ③根据记录的数据,作出两条-图线如图乙所示. 由图线可得电动势E=__________,内阻r=________,R=________.(均用图中的字母a、 x b、c表示) 4.利用如图(a)所示电路,可以测量电源的电动势和内阻,所用的实验器材有: 待测电源,电阻箱R(最大阻值999.9 Ω),电阻R(阻值为3.0 Ω),电阻R(阻值为3.0 Ω),电 0 1 流表 (量程为200 mA,内阻为R =6.0 Ω),开关S. A 实验步骤如下: ①将电阻箱阻值调到最大,闭合开关S; ②多次调节电阻箱,记下电流表的示数I和电阻箱相应的阻值R; ③以为纵坐标,R为横坐标,作-R图线(用直线拟合); ④求出直线的斜率k和在纵轴上的截距b. 回答下列问题: (1)分别用E和r表示电源的电动势和内阻,则与R的关系式为__________________. (2)实验得到的部分数据如下表所示,其中电阻R=3.0 Ω时,电流表的示数如图(b)所示,读 出数据,完成下表.答:①________,②________. R/Ω 1.0 2.0 3.0 4.0 5.0 6.0I/A 0.143 0.125 ① 0.100 0.091 0.084 /A-1 6.99 8.00 ② 10.0 11.0 11.9 (3)在图(c)的坐标纸上描点并作图,根据图线求得斜率k=____________ A-1·Ω-1,截距b= __________ A-1. (4)根据图线求得电源电动势E=________ V,内阻r=________ Ω.
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  1. CONNECT:[ UseTime:0.001027s ] mysql:host=127.0.0.1;port=3306;dbname=wenku;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.001674s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000767s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000691s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.001360s ]
  6. SELECT * FROM `set` [ RunTime:0.000623s ]
  7. SHOW FULL COLUMNS FROM `wendang` [ RunTime:0.001572s ]
  8. SELECT * FROM `wendang` WHERE `id` = 373456 LIMIT 1 [ RunTime:0.001250s ]
  9. UPDATE `wendang` SET `liulancishu` = 1 WHERE `id` = 373456 [ RunTime:0.017207s ]
  10. UPDATE `wendang` SET `lasttime` = 1773118195 WHERE `id` = 373456 [ RunTime:0.001321s ]
  11. SELECT * FROM `wendang` WHERE `id` < 373456 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.001074s ]
  12. SELECT * FROM `wendang` WHERE `id` > 373456 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000970s ]
  13. SELECT * FROM `wendang` WHERE `id` <> 373456 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.003290s ]
  14. SELECT * FROM `wendang` WHERE `id` <> 373456 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.008375s ]
  15. SELECT * FROM `wendang` WHERE `id` <> 373456 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.003508s ]
0.136921s