Question

Charge 3 nC is in a hollow cavity inside a large chunk of metal that is electrically neutral. The total charge on the exterior surface of the metal is

Answer 1

Explanation:

In order to maintain electrical neutrality, +3 nC charge which is present in the cavity tends to attract -3 nC charge in the inner surface of cavity.

Since, it is given that -3 nC charge is present in the hollow cavity. So, in order to maintain electrical neutrality -3 nc charge has to be present on the surface of the metal.

Thus, we can conclude that the total charge on the exterior surface of the metal is -3 nC.