Question: The power in 3 phase circuit is measured with the help of 2 wattmeters. The reading of the one of the wattmeters is positive and that of the other is negative. The magnitude of reading is different. it can concluded that the power factor of the circuit is :
Answer:
MCQ: The power in 3 phase circuit is measured with the help of 2 wattmeters. The reading of the one of the wattmeters is positive and that of the other is negative. The magnitude of reading is different. it can concluded that the power factor of the circuit is :
Correct Answer:
A. Unity
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Related Questions
- 1. Power consumed by a simple dc circuit can be measured with the help of a single ammeter if
- 2. Power indicated while measuring power in a dc circuit using an ammeter and a voltmeter, when the voltmeter is connected to the load side, is
- 3. In ammeter–voltmeter method for measurement of power in dc circuits, true power will be obtained with ammeter connected to the load side when
- 4. Electrodynamometer-type wattmeters have a construction where
- 5. In electrodynamometer-type wattmeters, current coil is made of two sections
- 6. In electrodynamometer-type wattmeters, current coils carrying heavy currents are made of stranded wire
- 7. In electrodynamometer-type wattmeters, a high value noninductive resistance is connected in series with the pressure coil
- 8. In electrodynamometer-type wattmeters, both current coil and pressure coil are preferably air-cored
- 9. In electrodynamometer-type wattmeters, pressure coil inductance produce error which is
- 10. When measuring power in a circuit with low current, the wattmeter current coil should be connected
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