Question

derive the expression for effective capacitance of three capacitors connected in series

Answer 1

By above equation
q / Cs = q / c1 + q / c2 + q / c3
on taking q as common and cancelling it out from both side we get the expression for 3 capacitors in series
1 / Cs = 1 / c1 + 1/ c2 + 1/ c3
hope u understand...