Question

How can we increase the capacitance of a capacitor?

Answer 1

Therefore, as the area of the plates increase, capacitance increases. Capacitance is directly proportional to the electrostatic force field between the plates. This field is stronger when the plates are closer together. Therefore, as the distance between the plates decreases, capacitance increases

Answer 2

If you want to increase the Capacitance of Parallele Plate Capacitor then increase the surface area, reduce the separation between the plate and use a dielectric material in between the plate which have higher dielectric breakdown strength.

$\bf \huge {OR}$

If anyone suggests you can increase your capacitance by changing multiple parameters of the capacitor such as:

C = E0ErA/ d

Where E0 = Permittivityof free space.

Er =By increasing Relative permittivity of dielectric.

d = By decreasing separation between the plates.

A = By increasing cross sectional area of plate

If you are not a capacitor designer or not in link with capacitor designer company, then all these are wasted instruction for you.

Best is just select two different value capacitor and connect in parallel to get capacitance which you want.

C=C1 + C2

$\bf \huge {OR}$

As long as I know there are few ways to increase capacitance;

》 increase relative plate area

》decrease plate distance

》increase dielectric constant

I have assumed for clarity that each one is applied keeping the others constant, but nothing forbids to apply all three at the same time.

As examples, variable tunning capacitors use the first approach. Electrolytic capacitors use the second one, and ceramic capacitors use the third one. There are many options in between.

It is worth to remember that you do get nothing for free. Or you get a bulkier device, or you get lower breakdown voltage, or you get non linear response or other "weird" effects as it is the case of ferroelectric ceramics.