题目内容
电动力出现最大值的条件有()。
2025-06-03
A.短路后1/4个周期,即t = 0.05s
B.短路后半个周期,即t = 0.01s
C.短路后3/4个周期,即t = 0.015s
D.短路后1个周期,即t = 0.02s
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