Question

In LC parallel resonance circuit, choose the correct statement.

Options

• At resonance, impedance is maximum.

• At resonance, the current is minimum.

• At resonance, resonance frequency = `sqrt("LC")`.

• Resonance occurs when inductive and capacitive reactance is the same.

Answer 1

Resonance occurs when inductive and capacitive reactance is the same.

Explanation:

At resonance in an LC parallel resonance circuit, the inductive and capacitive reactances are the same, i.e., X_L = X_C, hence impedance is minimum and current is highest.

Also, resonance frequency, `f_r = 1/(2pisqrt(LC))`