Embibe Experts Solutions for Chapter: Capacitance, Exercise 1: JKCET 2019

What is the total capacitance of the combination when $3$3 capacitors each of capacitance $9\mathrm{pF}$ are connected in series?

$n$ identical capacitors are joined in parallel and charged to a potential $\mathrm{V}$. The charged capacitors are disconnected and then connected in series using insulating handles such that the positive plate of one is connected to the negative plate of the other. The potential difference across the free plates of the combination is