【判断题】【消耗次数：1】
三相异步电动机带载工作时，其转子绕组上由于有外部电源给转子供电，故有电流。
①
正确
②
错误
参考答案：
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相关题目
【单选题】
三相异步电动机带载工作时，其转子绕组上?电流。
①
A．由于无外部电源给转子供电，故无电流
②
B．由于有外部电源给转子供电，故有电流
③
C．由于无电磁感应，故无电流
④
D．由于有电磁感应，故有电流
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