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A solid conducting sphere of radius 10 c...

A solid conducting sphere of radius `10 cm` is enclosed by a thin metallic shell of radius `20 cm`. A charge `q = 20 mu C` is given to the inner sphere is connected to the shell by a conducting wire.

Text Solution

Verified by Experts

The correct Answer is:
`9J`

Enegry stored in the filed between inner sphere and sell will dissiplate as heat.
`U_(1) = (Q^(2))/(2C_(1)) = (Q^(2)(r_(2)-r_(1)))/(4pe_(0)r_(1)r_(2)) =9J`
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