Electrical Measurement And Instrumentation
MEASUREMENT OF POWER MCQs
Total Questions : 103
Page 1 of 11 pages Answer is Option C. -> attaching small iron pieces
Answer: (c).attaching small iron pieces
Answer: (c).attaching small iron pieces
Answer is Option B. -> drilling two diametrically opposite holes
Answer: (b).drilling two diametrically opposite holes
Answer: (b).drilling two diametrically opposite holes
Answer is Option B. -> power consumption and time duration
Answer: (b).power consumption and time duration
Answer: (b).power consumption and time duration
Answer is Option A. -> IC
Answer: (a).IC
Answer: (a).IC
Answer is Option C. -> product of instantaneous voltage and current
Answer: (c).product of instantaneous voltage and current
Answer: (c).product of instantaneous voltage and current
Answer is Option B. -> When the readings of the two watt-meters are equal but opposite sign, the power factor is zero
Answer: (b).When the readings of the two watt-meters are equal but opposite sign, the power factor is zero
Answer: (b).When the readings of the two watt-meters are equal but opposite sign, the power factor is zero
Answer is Option C. -> 27.6 rpm
Answer: (c).27.6 rpm
Answer: (c).27.6 rpm
Answer is Option D. -> Unity
Answer: (d).Unity
Answer: (d).Unity
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?
Answer is Option D. -> P decreases 100 times and Q is increased 10 times
Answer: (d).P decreases 100 times and Q is increased 10 times
Answer: (d).P decreases 100 times and Q is increased 10 times
Answer is Option D. -> 19 kW
Answer: (d).19 kW
Answer: (d).19 kW
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