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Q.

A spherical capacitor composed of two concentric metal spheres one having a radius twice as large as the other. The region in which the energy is stored has a volume of

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a

14c3π2ε03

b

1384c3π2ε03

c

7C3384π2ε03

d

316c3π2ε03

answer is D.

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Detailed Solution

C=4πε0abb−a

⇒C=4πε02a2a

⇒a=C8πε0

Volume in which field exists =43πb3−43πa3

=7C3384π2ε03

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