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JEE Main 202225 JulyMorning Shift
Exam
JEE Main
Year
2022
Date
25 July
Shift
Morning Shift
Subject
Physics
Chapter
Alternating Current

JEE Main 2022 · 25 July · Morning Shift · Physics · Alternating Current

To increase the resonant frequency in series LCR circuit,

To increase the resonant frequency in series LCR circuit,

Options

  1. ASource frequency should be increased
  2. BAnother resistance should be added in series with the first resistance.
  3. CAnother capacitor should be added in series with the first capacitor
  4. DThe source frequency should be decreased

Correct answer

C. Another capacitor should be added in series with the first capacitor

Step-by-step solution

The resonant frequency of an LCR circuit is given by f=12πLCf = \dfrac{1}{2\pi\sqrt{LC}}. It does not depend on the source frequency as well as the resistance of the circuit.

Therefore, to increase the resonating frequency product of LL and CC should decrease.

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

Hence, option C is correct option.

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