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## Homework Statement

a dielectric of dielectric constant 3 fills three fourth of the space between the plates of a parallel plate capacitor. What percentage of the energy is stored in the dielectric.

## Homework Equations

U=CV

^{2}/2

= epsilon

_{0}AV

^{2}/d.2

## The Attempt at a Solution

When dielectric is introduced the above equation changes to epsilon

_{0}AV

^{2}/(d-t+t/epsilon

_{r})

I substituted 3d/4 for t since dielectric fills three fourth of space between the plates of capacitor and 3 for relative permeability.

When simplified i got the answer epsilon

_{0}AV

^{2}/d

which is twice the value of U that is 2U

In the book the answer is given as 50% which i don't understand. How this 50% comes? Thanks in advance, revered members