A) 0.5
B) 1.0
C) 0
D) \[\infty \]
Correct Answer: B
Solution :
Option [b] is correct. Explanation: When the voltage and current are in phase with each other in an AC circuit, the energy from the source is fully converted into another form to drive the load and in this case, power factor is unity. When the power factor drops, the system becomes less efficient.
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