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A parallel plate capacitor of capacitance 90 pF is connected to a battery of EMF 20 V . If a dielectric material of dielectric constant K = 5 3 is inserted between the plates, the magnitude of the induced charge will be:

Options

  1. A0 . 9   nC
  2. B1 . 2   nC
  3. C0 . 3   nC
  4. D2 . 4   nC

Correct answer

B. 1 . 2   nC

Step-by-step solution

Induced charge on the dielectric, Q i n d u c e d = K C V 1 - 1 k = 5 3 × 90 × 10 - 12 × 20 1 - 3 5 = 1.2   nC .

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