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單項選擇題

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

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單項選擇題

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

單項選擇題

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

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