A parallel plate air capacitor is made using two square plates each of side 0.2 m, spaced 1 cm apart. It is connected to a 50V battery.
What is the energy stored in the capacitor ?

Explanation

To solve the problem of finding the energy stored in a parallel plate air capacitor, we can follow these steps:

### Step 1: Calculate the Area of the Plates
The area \( A \) of each square plate can be calculated using the formula:
\[ A = \text{side}^2 \]
Given that the side length of the plates is \( 0.2 \, \text{m} \):
...