USCG USCG Electrical
Set 4 • Question #100 of 142
Launch Interactive Practice Room Ammeters and voltmeters used in sinusoidal AC power systems indicate which of the following values of the waveforms measured?
A
Peak value
B
Root-mean-square value
✓ Correct Answer
C
Average value
D
Maximum value
USCG NMC Regulatory Explanation
Voltmeter loading effect occurs when the meter draws appreciable current from the circuit under test, distorting the measured voltage. Selecting a meter with an input impedance much higher than the circuit impedance ensures minimal parallel loading and accurate readings.
Question Discussion & Notes
0Have a doubt, memory trick, or exam update? Share your insights with fellow mariners.
Loading mariner discussions...