题目内容
图所示RLC并联电路中,t=0时开关S闭合。问t>0时三个灯泡L1、L2和L3的亮度如何变化?()。
2020-12-16
A.L1的点亮之后亮度不变
B.L2的缓慢亮起之后到最亮
C.L3的亮度先最亮后熄灭
D.L2和L3不亮
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