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MHT CET202410 May 2024Evening ShiftPhysicsAlternating CurrentActual

In series LCR circuit, 'R' represents resistance of electric bulb. If the frequency of a.c. supply is doubled, the value of inductance ' L ' and capacitance ' C ' should be

Options

  1. Aboth doubled.
  2. Bmade four times.
  3. Cmade eight times.
  4. Dboth halved simultaneously.

Correct answer

D. both halved simultaneously.

Step-by-step solution

In an LCR circuit aligned I= E Z & = E R^2+ (X_L-X_C )^2 & = E R^2+ (2 f L- 1 2 f C )^2 aligned To keep I constant, if f is doubled both L and C should be halved.

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