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Engine : Electricity - 1172/1386
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When testing the rotor of a synchronous motor for short circuits, a low voltage source is applied across the rotor coils through the collector rings. What would be the indication of a short- circuited coil?
A) fluctuating voltmeter reading, while the other coil readings are steady
B) steady voltmeter reading, while the other coil readings are fluctuating
C) low or zero voltage drop reading, while the other coils will have higher readings
D) high voltage drop reading, while the other coil readings will have an equal or lower value
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