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  4. 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

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Q. 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 isPhysics Question Image

Electrostatic Potential and Capacitance

Solution:

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