单项选择题
A.series with a circuit B.parallel with a circuit C.series-parallel with a circuit D.delta with the shunt
The primary function of an electric motor is to （）A.dev...
单项选择题The primary function of an electric motor is to （）
A.develop torque B.generate high voltages C.produce a magnetic field D.generate high electrical resistance
The power factor at which a paralleled AC generator ope...
单项选择题The power factor at which a paralleled AC generator operates is usually adjusted by the （）.
A.connected load B.prime mover speed C.field excitation D.generators rated voltage
If the resistance of a circuit is cut in half and the a...
单项选择题If the resistance of a circuit is cut in half and the applied voltage is kept constant, the current flow will be （）.
A.doubled B.quadrupled C.unchanged D.cut in half
