A spherical conducting shell has charge Q. A point charge q is placed at the center of the cavity. The charge on the inner surface of the shell and the charge on the outer surface of the shell, respectively, are:

a. -q, 0
b. q, Q - q
c. 0, Q
d. -q, Q + q
e. Q, 0

Electric field inside a spherical shell is zero and hence there is no charge inside the spherical shell because q charge induces a -q charge on inside surface of spherical shell.

and to counter it there is q charge on the surface. So total charge outside the surface is Q+q

A spherical conducting shell has charge Q. A point charge q is placed at the center of the cavity. The charge on the inner surface of the shell and the charge on the outer surface of the shell, respectively, are: a. -q, 0 b. q, Q - q c. 0, Q d. -q, Q + q e. Q, 0

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A spherical conducting shell has charge Q. A point charge q is placed at the center of the cavity. The charge on the inner surface of the shell and the charge on the outer surface of the shell, respectively, are:

a. -q, 0
b. q, Q - q
c. 0, Q
d. -q, Q + q
e. Q, 0