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Physics · 2018
JEE Main 2018 · 2018-04-08 Offline · Q14
Three concentric metal shells A, B and C of respective radii a, b and c ( a < b < c ) have surface charge densities +σ,-σ and +σ respectively. The…
Three concentric metal shells A, B and C of respective radii $\displaystyle \mathrm{a}, \mathrm{b}$ and $\displaystyle \mathrm{c}(\mathrm{a}<\mathrm{b}<\mathrm{c})$ have surface charge densities $\displaystyle +\sigma,-\sigma$ and $\displaystyle +\sigma$ respectively. The potential of shell B is :
Official answer
(2)
$\displaystyle \frac{\sigma}{\epsilon_o}\left[\frac{\mathrm{a}^2-\mathrm{b}^2}{\mathrm{~b}}+\mathrm{c}\right]$
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