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AP EAMCET202119 Aug 2021Morning ShiftPhysicsAlternating CurrentActual

A resonant frequency of a circuit is f . If the capacitance is made four times the initial value, then the resonant frequency will become

Options

  1. Af
  2. Bf 2
  3. Cf 4
  4. D2 f

Correct answer

B. f 2

Step-by-step solution

Resonance frequency of an L-C circuit is the frequency when the intensity of current is maximum in the circuit. Resonant frequency, f = 1 2 π L C f ∝ 1 C or f 1 f 2 = C 2 C 1 Now, if the capacitance is made four times the initial value, f f 2 = 4 C C ⇒ f 2 = f 2

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