liudan195539 春芽
共回答了23个问题采纳率:95.7% 举报
(1)与电阻并联的是电压表,与电阻串联的是电流表,如图所示:
(2)由图知,滑动变阻器的下面接了左边的a接线柱,所以在闭合开关前,应将滑片移至右端即b端,使其阻值最大.
故答案为:(1)见上图;(2)b;最大.
点评:
本题考点: 伏安法测电阻的探究实验.
考点点评: 此题是“用电流表、电压表测电阻”的实验,考查了电流表和电压表及滑动变阻器的接法和使用,是基础性题目.
1年前
(2011•宝山区一模)在“用电流表、电压表测电阻”的实验中:
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