Question

Two parallel plate air filled capacitors, each of capacitance $C$, are joined to a source of constant emf $V$ as shown in figure. The plate $A$ is earthed. Plates $B$ and $C$ are connected together. Plate $D$ is connected to the positive pole of the battery whose negative is earthed. The combined capacitance of the arrangement is

• A. 2 C
• B. C
• C. C/2
• D. 3 C

Answer 1

Answer: (C)

The two capacitors are connected in series. The combined capacitance of this arrangement is $C/2$.