Suppose the charge at the center is now increased to +7 Q , while the charge at

Question

Suppose the charge at the center is now increased to +7Q, while the charge at the surface of the conductor is changed to +6Q. (Use the following as necessary: 0, , Q and r.)

( I have asked this question multiple times NOBODY has gotten it right or has attempted to solve the problem, and I only have ONE attempt left :( this is my last resort- please show your work legibly)

(a) Find the electric field exterior to the sphere, for r > b.
E =

(b) What's the electric field inside the conductor, for a < r < b.
E =

(c) Find the charge distribution on the conductor.

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Explanation / Answer

a) E(4*pi*r^2) = +13Q/e*o

E = +13Q/[(4*pi*e*o)r^2]

b) The electric field inside of a conductor (with no current) is zero.

For the electric field in the region a<r<b to be zero,

c)The charge on this surface would be equal in magnitude,

but opposite in sign to the point charge in the center: -7Q.

exterior surface

If the conductor has a total charge of +6Q and the charge on the inner surface is -7Q,

the charge on the outside surface would be: +6Q - (-7Q) = +13Q

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