Question

A parallel plate capacitor filled with a medium of dielectric constant 10, is connected across a battery and is charged. The dielectric slab is replaced by another slab of dielectric constant 15. Then the energy of capacitor will

• A. increased by 50%
• B. increased by 15%
• C. increased by 25%
• D. increased by 33%

Answer 1

Answer: (A)

increased by 50%

Answer 2

The correct option is(A): increased by 50%

$U=\frac{1}{2}=(kC_0)V^2$

$⇒\frac{U}{U}=1.5$

⇒ Energy increases by 50%