Draw a graph showing the variation of electric field, as one moves from the centre of a charged metal ball to a point on its surface and then to a far off outside point.
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From Gauss's theorem, charged enclosed in spherical shell.
That is Ф=∫E.ds = 1/ε₀× Charged enclosed by surface
= 1/ε₀× 0
=> E= 0
The graph shows variation as a function of radius of ball
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