- #1
Physicslearner500039
- 124
- 6
- Homework Statement
- An isolated conductor has net charge +10 X 10 -6 C and a cavity with a point charge q = +3.0 X 10-6 C. What is the charge on (a) the cavity wall and (b) the outer surface?
- Relevant Equations
- NA
I really don't understand the theory of the above kind of questions. But from the little theory i understand the Electric field is 0 inside the conductor and all the charge goes to the surface and distributes equally.
a. Since the E=0 inside the conductor the point charge distributes outside the cavity to make the net charge as 0. Hence the cavity develops a charge of -3uC on its surface. I am not 100% sure how it works and the negative sign. Please advise.
b. If i apply the Gauss Law with a surface around the conductor the net charge enclosed is 10uC + 3uC = 13uC distributes on the surface of the conductor.