Question

Each capacitors has capacitance C in Fig.
Find $C_{AB}$

• A. C
• B. 2 C
• C. C/2
• D. 3C/2

Answer 1

Answer: (C)

C/2

The triangle part circuit is a wheat-stone bridge. So its equivalent capacitance , $C_{eq}=C$ and it is connected in series with $C$ which is outside triangle.
thus, $C_{AB}=\frac{CC}{C+C}=\frac{C}{2}$