你可能感興趣的試題

AC and DC generators are similar in that they （）

A.both generate alternating voltages
B.both rectify the voltage before delivery
C.are constructed at the same physical size for the same kilowatt rating
D.both supply three-phase power

單項選擇題

To increase the frequency of an operating AC generator, you should （）

A.increase the field excitation
B.decrease the field excitation
C.increase the number of magnetic poles
D.increase the speed of the prime mover