When ____ are applied to a circuit, be sure that the power is turned off.
A)voltmeters
B)amperemeters
C)wattmeters
D)ohmmeters

Question

Quizplus · Accepted Answer

Ohmmeters measure resistance, which requires the circuit to be turned off in order to get an accurate reading. Voltmeters, amperemeters, and wattmeters measure voltage, current, and power respectively, but they can be applied to a circuit that is turned on.

When ____ Are Applied to a Circuit, Be Sure That