Question

In a parallel resonant circuit, the line current at resonance is

• A. Maximum
• B. Minimum
• C. Infinite
• D. Equal to branch current

Hint:

For a parallel resonant circuit, \[ \boxed{ \begin{aligned} \text{Impedance} &\rightarrow \text{Maximum}, \text{Line current} &\rightarrow \text{Minimum}. \end{aligned} } \]

Answer 1

The Correct Option is B

Step 1: Recall the condition of parallel resonance. At resonance, \[ X_L=X_C. \] The inductive and capacitive branch currents are equal and opposite, so they cancel each other.

Step 2: Determine the line current. Since the reactive currents cancel, \[ \boxed{\text{The source (line) current becomes minimum.}} \] Hence, \[ \boxed{(B)} \] is the correct answer.