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單項選擇題

An ammeter should be used to measure （）

A.the voltage between two points in a circuit
B.circuit continuity
C.current flow in a circuit
D.total or partial circuit resistance

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單項選擇題

When the voltage remains constant and the resistance is increased in a series circuit, the flow of current （）

A.increases by the square of the original value
B.increases
C.remains the same
D.decreases

單項選擇題

The power factor of an AC generator operating singularly is determined by the （）

A.connected load
B.prime mover speed
C.field excitation
D.generators rated voltage