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Two insulated metallic spheres of 3mu F ...

Two insulated metallic spheres of `3mu F` and `5 muF` capacitances are charged to `300 V` and `500 V` respectively. The energy loss, when they are connected by a wire is

A

`0.012 J`

B

`0.0218 J`

C

`0.0375 J`

D

`3.75 J`

Text Solution

Verified by Experts

The correct Answer is:
C
`DeltaU=1/2 (C_1C_2)/(C_1+C_2)(V_2-V_1)^2`
`=1/2 xx((3 xx5) xx10^(-12))/(8 xx10^(-6)) xx(500 - 300)^2`
`= 0.0375J.`
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