Four identical condensers are connected in parallel and then in series. The ratio of equivalent capacitance in series to that in parallel combination is

Explain the necessity of the combination of capacitors and the ways of their connections.

Two parallel plate air capacitors are connected in parallel. Each capacitor has plate area $A/2$ and separation between the plates is $d$ and $2d$ respectively. The equivalent capacity of the combination is $(\epsilon_0 = \text{absolute permittivity of free space})$

$A$ potential difference of $300\, V$ is applied to a combination of $2.0\,\mu F$ and $8.0\,\mu F$ capacitors connected in series. The charge on the $2.0\,\mu F$ capacitor is

“The magnitude of effective capacitance in series connection of capacitors increases.” Is this statement true or false?

What is series connection of capacitors? And what is parallel connection of capacitors?