To increase the resonant frequency in series LCR circuit,

To increase the resonant frequency in series LCR circuit,
  1. Source frequency should be increased
  2. Another resistance should be added in series with the first resistance.
  3. Another capacitor should be added in series with the first capacitor
  4. The source frequency should be decreased

Solution

The resonant frequency of an LCR circuit is given by f=12πLC. It does not depend on the source frequency as well as the resistance of the circuit.

Therefore, to increase the resonating frequency product of L and C should decrease.

By joining another capacitor in series, the equivalent capacitor will decrease.

Hence, option C is correct option.

Asked in: JEE Main 2022 (25 Jul Shift 1)

Practice more AC Circuits questions on Aicharya