A parallel plate capacitar, of capacitance, `20 mu F`, is connected to a 100 V supply. After some time, the battery is disconnected , and the space, between the plates of the capacitor is filled with a dielectric, of dielectric constant 5. Calculate the energy stored in the capacitar (i) before (ii)after dielectric has been put in between its plates.

Explanation

To solve the problem, we need to calculate the energy stored in a parallel plate capacitor both before and after a dielectric is introduced. Let's go through the calculations step by step.

### Step 1: Calculate the energy stored before the dielectric is introduced.

The formula for the energy (U) stored in a capacitor is given by:

\[
U = \frac{1}{2} C V^2
...