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Question: A capacitor of capacity \(C _ { 2 }\) as shown in the adjoining figure. The ratio of energies before...

A capacitor of capacity C2C _ { 2 } as shown in the adjoining figure. The ratio of energies before and after the connection of switch SS will be

A

(C1+C2)/C1\left( C _ { 1 } + C _ { 2 } \right) / C _ { 1 }

B

C1/(C1+C2)C _ { 1 } / \left( C _ { 1 } + C _ { 2 } \right)

C

C1C2C _ { 1 } C _ { 2 }

D

C1/C2C _ { 1 } / C _ { 2 }

Answer

(C1+C2)/C1\left( C _ { 1 } + C _ { 2 } \right) / C _ { 1 }

Explanation

Solution

Energy (U) U∝1CU \propto \frac { 1 } { C }

⇒ C1+C2C1\frac { C _ { 1 } + C _ { 2 } } { C _ { 1 } }