Ans. Parallel combination: If the first plates of all the capacitors connected to common terminal and second plates of all the capacitors connected to common
terminal and these terminals are connected to oppositeterminals of the battery
Three capacitors of capacities $C_1, C_2$ and $C_3$ are connected in parallel combination as shown in the figure.In parallel combination the potential on each capacitor will be same but charge is different.
$q_1={V}{C_1},q_2= {V}{C_2},q_3= {V}{C_3} $and $ Q={V}{C}$.
Total charge in the parallel combination is $$Q = q_1 + q_2 + q_3$$ $${V}{C}={V}{C_1}+{V}{C_2}+ {V}{C_3} $$$$ {C}= {C_1}+ {C_2}+ {C_3} $$
The above equation represents equivalent capacitance in parallel combination