If the charge on a capacitor is increased by 2 C , the energy stored in it increases by 44 % . The original…

If the charge on a capacitor is increased by 2C, the energy stored in it increases by 44%. The original charge on the capacitor is (in C)
  1. 10
  2. 20
  3. 30
  4. 40

Solution

Energy stored in a capacitor is given by E=Q22C.

Let initial charge be Q0.

Then, 1.44Q022C=Q0+222C

⇒1.2Q0=Q0+2

Q0=20.2=10 C

Asked in: JEE Main 2022 (24 Jun Shift 2)

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