When the switch controlling overhead lighting, the solenoid of a relay, contactor, or motor starter, or the power supplied to an electric motor is closed, then ________________ should be measured across the switch and the ________________ should be measured across the terminals of the light, the solenoid, or the motor.
A) zero volts; zero volts
B) zero volts; circuit voltage
C) circuit voltage; circuit voltage
D) circuit voltage; zero volts
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