Question

Suppose some amount of charge is given on the surface of a solid sphere uniformly. Then what will be the electric field outside the sphere?

Answer 1

You have to apply gauss' law, and what comes out is that you've to consider the entire sphere as a unique point charge, so if the charge on the sphere is Q, you'll have:\[E=\frac{ Q }{ 4\pi \epsilon _{o}d^2 }\]
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