(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

Two spherical concentric conductors of radius a and b (b>a). Larger conductor has charge Q and the inner conductor is earthed. Find capacitance

2. Relevant equations

3. The attempt at a solution

Well i have spent a lot of time on this but couldnt get the desired answer which is

4πε b^2 / (b-a)

Okay i know the inner sphere should be at zero potential, so some negative will get induced on the inner sphere which is equal to aQ/b.

Well after this capacitance = q/V(q = aQ/b) and i get the answer 4πεa which is wrong

I need help

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# Homework Help: Capacitance if inner sphere is earthed

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