问题
探究题
张华同学在做测定小灯泡额定功率的实验中,所用电源电压为6V,滑动变阻器最大阻值为15Ω,小灯泡额定电压为2.5V,电阻约为6Ω,他所连的电路如图所示,图中有3处错误或不妥,请指出:
(1)______________________________________________________________________
(2)______________________________________________________________________
(3)______________________________________________________________________
答案
(1)滑动变阻器接线方法错
(2)电流表量程选错
(3)电压表接线错