Measurement Of Power(Electrical Measurement And Instrumentation ) Questions and Answers
Explanation:-
Answer: Option B. -> When the readings of the two watt-meters are equal but opposite sign, the power factor is zeroAnswer: (b).When the readings of the two watt-meters are equal but opposite sign, the power factor is zero
Question 9. A coil (which can be modelled as a series RL circuit) has been designed for high Q performance. The voltage is rated at and a specified frequency. If the frequency of operation is increased 10 times and the coil is operated at the same rated voltage. The new value of Q factor and the active power P will be?
Explanation:-
Answer: Option D. -> P decreases 100 times and Q is increased 10 timesAnswer: (d).P decreases 100 times and Q is increased 10 times