单选题某直流发电机的空载电压U0=400V,如在转速不变的情况下,将其主磁通减少15%,则此时的空载电压为()。A60VB300VC340VD460V
单选题
某直流发电机的空载电压U0=400V,如在转速不变的情况下,将其主磁通减少15%,则此时的空载电压为()。
A
60V
B
300V
C
340V
D
460V
参考解析
解析:
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