A parallel plate capacitor of capacitance 90   pF is connected to a battery of EMF 20   V . If a…

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=53 is inserted between the plates, the magnitude of the induced charge will be:
  1. 0.9 nC
  2. 1.2 nC
  3. 0.3 nC
  4. 2.4 nC

Solution

Induced charge on the dielectric,
Qinduced=KCV1-1k=53×90×10-12×201-35=1.2 nC.

Asked in: JEE Main 2018 (08 Apr)

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