1:1  03-22[物理]牛老师教你学会双安法、双伏法测电阻
推荐理由：一题教双法，学会双安法、双伏法测电阻。 讲解人：牛颖，北京市高级教师，市级骨干教师，2008年北京市中考物理命题教师 题面：在“测未知电阻Rx的阻值”实验中，请完成下列相关问题： （1）用笔划线代替导线将图甲中的实物连接完整。 
（2）把第二次测量时，图乙所示的电压表和电流表的示数填入表中相应的位置。
（4）另有同学设计了下列二种测量方案，方案中定值电阻的阻值为R0。
①方案一的电路中，闭合开关S，如果电压表V1和V2的读数分别为U1和U2，则电阻Rx的阻值表达式为Rx=________； ②方案二的电路中，闭合开关S，如果电流表A1和A2的读数分别为I1和I2，则电阻Rx的阻值表达式为Rx=________。 【答案及详解】 本部分内容设定了隐藏,需要回复后才能看到
选题来源：http://www.jiandan100.cn/c3/lesson/c/s13354/
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双安法、双伏法测电阻，同学们你们掌握了吗？ ------------------------------------------------------------------------------------------------------------------------------------------------------------------ 查看更多本年级每周一题，请点击：http://www.jiandan100.cn/bbs/upload/forumdisplay.php?fid=380& 浏览本期“简单学习电子周报”完整目录：http://www.jiandan100.cn/bbs/upload/viewthread.php?tid=664902 |
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