The power consumed in a circuit element will be least when the phase difference between the current and voltage is

The power consumed in a circuit element will be least when the phase difference between the current and voltage is

A. 180
B. 90
C. 60
D. 0



Explanatory answer:

we know power in ac circuit,  P=VICOSø

when  ø = 90, COS(90)= 0

Therefore the power consumed by the circuit will becomes zero at  ø = 90  (least value).