A slab of material of dielectric constant K has the same area as the plates of a parallel plate capacitor, but has a thickness `3d//4`. Find the ratio of the capacitance with dielectric inside it to its capacitance without the dielectric.

Explanation

To find the ratio of the capacitance of a parallel plate capacitor with a dielectric slab to that without the dielectric, we can follow these steps:

### Step 1: Determine the capacitance without the dielectric
The capacitance \( C_0 \) of a parallel plate capacitor without any dielectric is given by the formula:
\[ C_0 = \frac{\varepsilon_0 A}{d} \]
where:
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