engineering recuitment UPCL AE (E&M) 2021 Mock Test Electrical and Electronics Measurements Indicating Instruments
The current and potential coils of a dynamometer type wattmeter were accidentally interchanged while connecting. After energizing the circuit, it was observed that the wattmeter did not show the reading, this could be due to:
1
Damage to potential coils
2
Damage to current coil
3
Damage to both current coil and pressure
4
Loose contacts