The maximum value of power factor is ____ and it exists in a pure____ circuit.

• A. 0.866, inductive
• B. 1, resistive
• C. 1, inductive
• D. 0.866, resistive

Answer: (B)

Value of power factor is varies from 0 to 1.
R→PF = 1
L→PF = 0 lag
C→PF = 0 lead
R-L→0 lag < PF < 1
R-C→0 lead < PF < 1
R-C-L→depends on value of R, L and C. PF = R/Z