Question

In LCR series circuit at resonance

• A. the current is minimum.
• B. the impedance is maximum.
• C. the current leads the voltage by \(\frac{π}{2}\)
• D. the current and voltage are in phase.

Hint:

At resonance \(X_L=X_C\), so impedance equals \(R\).

Answer 1

The Correct Option is D

Step 1: Use the phase formula
$\tan\phi=\dfrac{X_L-X_C}{R}=0$ at resonance.

Step 2: Interpret
Zero phase angle means voltage and current are in phase, option (D).

Final Answer:
Voltage and current are in phase at resonance, option (D). \[ \boxed{\text{(D)}} \]