Networks Analysis and Synthesis - Engineering

Q1:

In an ac circuit, the maximum and minimum values of power factor can be

A 2 and 0

B 1 and 0

C 0 and -1

D 1 and -1

ANS:B - 1 and 0

Power factor is maximum and equal to 1 for purely resistive load. Power factor is minimum and equal to zero for purely reactive load.