Explain how Capacitors increase when the distance of the two parallel plate decrease?

the capacitors do not decrease -- the capacitance does.

As usual, google is the first place to go for general explanations such as this. Or maybe your textbook.

physics.stackexchange.com/questions/321032/why-as-distance-decreases-capacitance-increases

When the distance between the two parallel plates of a capacitor decreases, the capacitance increases. To understand this, let's first define what a capacitor is.

A capacitor is an electronic component that stores electrical energy in the form of an electric field. It consists of two conducting plates separated by a dielectric material. The capacitance of a capacitor is a measure of its ability to store electric charge.

The capacitance of a capacitor is given by the formula:

C = εA/d

Where:
C is the capacitance,
ε is the permittivity of the dielectric material,
A is the area of one of the plates, and
d is the distance between the plates.

From the formula, we can see that capacitance is inversely proportional to the distance between the plates (d). This means that as the distance decreases, the capacitance increases.

To understand why this happens, consider that the electric field between the plates increases as the distance decreases. The electric field lines become more concentrated, leading to a higher density of electric field lines per unit area. This increased density of electric field lines results in a stronger electric field between the plates.

A stronger electric field means that more electric field lines can terminate on the plates, which effectively increases the amount of charge that the capacitor can store. As a result, the capacitance increases.

To summarize, when the distance between the two parallel plates of a capacitor decreases, the electric field between the plates becomes stronger. This leads to a higher density of electric field lines, allowing the capacitor to store more charge and increasing its capacitance.