Question

Power factor is maximum in an LCR circuit when

• A. $X _ { L } = X _ { C }$
• B. $R = 0$
• C. $X _ { L } = 0$
• D. $X _ { C } = 0$

Answer 1

Answer: (A)

$X _ { L } = X _ { C }$

Answer 2

In LCR circuit; in the condition of resonance $X _ { L } = X _ { C }$ i.e. circuit behaves as resistive circuit. In resistive circuit power factor is maximum.