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MHT CET202618 April 2026Morning ShiftPhysicsCapacitanceActual

A capacitor of capacitance C has charge Q and energy stored in it is W. If the charge is increased to 3Q, the energy stored in the capacitor W' will be

Options

  1. A9W
  2. B3W
  3. CW 3
  4. DW 6

Correct answer

A. 9W

Step-by-step solution

The initial energy stored in the capacitor is given by: W = Q^2 2C When the charge is increased to 3Q , the new energy stored in the capacitor becomes: W' = (3Q)^2 2C W' = 9Q^2 2C W' = 9 ( Q^2 2C ) W' = 9W Answer: 9W

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