Question

Find the capacitance of the following combinations between terminals A and B. Area of the plate is A and the separation between the nearest two plates is ‘d’.

Answer 1

When A and B are connected to the positive and negative plates of the battery, respectively, the charges will appear on them as:

There are three capacitors in parallel. Thus, 

C_AB = 3 C

= `(3 epsilon_0 A)/d`