Auniformly charged ball of radius a and charge –q is at the center of a hollow metal shell with inner radius b and outer radius c. the hollow sphere has a net charge of +2q. determine the strength of electric field in the four regions:

i)

ii)

iii) E = 0

iv)

Explanation:

1) Electric field inside uniformly charged ball

By Gauss law we will have

now we have

2) Electric field outside the ball and inside the shell

By Gauss law we will have

now we have

3)Electric field inside the metallic shell

E = 0

As we know that inside the conductor net electric field is always zero

4)Electric field outside the shell

By Gauss law we will have

now we have