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MHT CET Medical202622 April 2026Morning ShiftPhysicsCapacitanceActual

A parallel plate capacitor filled with oil of dielectric constant 3 between the plates, has a capacitance 'C'. If the oil is completely removed, then the capacitance of the capacitor will be

Options

  1. A3 , C
  2. BC 3
  3. CC 3
  4. D3 , C

Correct answer

B. C 3

Step-by-step solution

The capacitance of a parallel plate capacitor filled with a dielectric of constant K is given by C = K ₀ A d . Given K = 3 , the initial capacitance is C = 3 ₀ A d . When the oil is completely removed, the medium between the plates becomes air or vacuum, for which the dielectric constant is 1 . The new capacitance becomes C' = ₀ A d . From the initial equation, we have ₀ A d = C 3 . Therefore, the new capacitance is C' = C 3 . Answer: C 3

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