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所谓功率方向继电器的潜动,是指( )的现象

单选题
2021-09-01 20:45
A、只给继电器加入电流或电压时,继电器不动作
B、只给继电器加入电流或电压时,继电器动作
C、加入继器的电流与电压反相时,继电器动作
D、与电流、电压关
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正确答案
B

试题解析

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