Compare the expression for magnetic energy density with electrostatic energy density stored in the space between the plates of a parallel plate capacitor.

Explanation

To compare the expression for magnetic energy density with electrostatic energy density stored in the space between the plates of a parallel plate capacitor, we will derive both expressions step by step.

### Step 1: Deriving Electrostatic Energy Density

1. **Capacitance of a Parallel Plate Capacitor**:
The capacitance (C) of a parallel plate capacitor is given by the formula:
\[
C = \frac{\epsilon_0 A}{d}
...