engineering recuitment MAHATRANSCO AE Electrical Mock Test Electrical and Electronics Measurements Indicating Instruments Electro Dynamometer Type Instruments
The current and potential coil 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 the
1
Damage to potential coil
2
Damage to current coil
3
Damage to both the potential and current coil
4
Loose contacts