10 C of charge are placed on a spherical conducting shell.A particle with a charge of -3C is placed at the center of the cavity.The net charge on the outer surface of the shell is:
A)-7 C
B)-3 C
C)0 C
D)+3 C
E)+7 C

Question

Quizplus · Accepted Answer

The net charge on the outer surface of the shell equals the total charge placed on the shell plus the charge of the particle inside the cavity. Since 10 C are placed on the shell and a -3 C charge is placed inside, the net charge on the outer surface is 10 C - 3 C = +7 C.

10 C of Charge Are Placed on a Spherical Conducting