As shown in the illustrated diagnostic setup for locating a shorted field coil of a ten- pole synchronous motor, if 240 VAC 60-Hz is applied across the brushes, what would be the individual voltage drops measured across each field coil assuming that none of the field coils are shorted? EL-0202
Official USCG Answer & Rule Citation
Correct Answer: Option D — 24 VAC
In a series circuit with identical components, total applied voltage divides equally across each element. Dividing the 240 VAC applied across the brushes by the ten identical field coils yields a 24 VAC drop per coil.
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