A spherical shell made of plastic, contains a charge Q distributed uniformly over its surface. What is the electric field inside the shell? If the shell is hammered to de-shape it without altering the charge, will the field inside be changed? What happens if the shell is made of a metal?
The charge Q is uniformly distributed over its surface, according to Gauss’ law, 
,
Where
E = electric field,
Φ = electric flux flowing out through the surface
ds = surface area element, q = charge enclosed,
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