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)

In an $LCR$ circuit, in the condition of resonance $X_L=X_C$, i.e., circuit behaves as resistive circuit. In resistive circuit power factor is maximum.