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MHT CET20228 Aug 2022Morning ShiftPhysicsAlternating CurrentActual

In series L-C-R circuit, the capacitance is changed from C to 2 C . To obtain the same resonance frequency the inductance should be changed from L to

Options

  1. A2 L
  2. B4 L
  3. CL 2
  4. DL

Correct answer

C. L 2

Step-by-step solution

Resonant frequency, f= 1 2 L C As the frequency is unchanged so f=f^ aligned & L C=L^ C^ =L^ (2 C) & L^ = L 2 aligned

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