题目内容
关于测量用的球隙,下面哪些是对的()?
2020-12-26
A.球隙不必串有保护电阻
B.用球隙测量直流电压时,测量效果不如棒棒间隙
C.在测量冲击电压时串联的电阻不超过500Ω
D.测量球隙的球隙距离d与直径D之比<0.5
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