A point charge q is located at the center of a spherical shell of radius a that has a charge −q uniformly distributed on its surface. Find the electric field for the following points: (a) for all points outside the spherical shell E = keq2/r2 E = q/4πr2 none of these E = keq/r2 E = 0 (b) for a point inside the shell a distance r from the center E = keq2/r2 E = keq/r2 E = 0 E = q/4πr2 none of these

a) E = 0

b)

Explanation:

The electric field for all points outside the spherical shell is given as follows;

a)

From which we have;

E = 0/A = 0

E = 0

b)

By Gauss theorem, we have;

Therefore, we get;

The electrical field outside the spherical shell

Therefore, we have;

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