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

A. `1.2nC`
B. 0.3nC
C. 2.4nC
D. 0.9nC

Answer

A

Explanation

Magnitude of induced charge is gicen by
`Q'=(K-1)CV_(0)=((5)/(3)-1)90xx10^(-12)xx20=1.2xx10^(-9)C implies Q'=1.2nC`