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?

Question

Accepted Answer

low or zero voltage drop reading, while the other coils will have higher readings

Answer

high voltage drop reading, while the other coil readings will have an equal or lower value

Answer

steady voltmeter reading, while the other coil readings are fluctuating

Answer

fluctuating voltmeter reading, while the other coil readings are steady

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