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A spherical capacitor has an inner sphere of radius $12\;cm$ and an outer sphere of radius $13\;cm$. The outer sphere is earthed and the inner sphere is given a charge of $2.5\;\mu C$. The space between the concentric spheres is filled with a liquid of dielectric constant $32$. What is the potential of the inner sphere?

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$(A)\;4.5 \times 10^2 V$
Hence A is the correct answer.
answered Jun 24, 2014 by meena.p
 

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