Equilibrium question about charges.

thatoneguy123

Which of the following are true? "Equilibrium" means that no charges are flowing.

A. The net electric field inside a block of aluminum is zero under all circumstances.

B. The electric field from an external charge cannot penetrate to the center of a block of iron.

C. In equilibrium, there is no net flow of mobile charged particles inside a conductor.

D. If the net electric field at a particular location inside a piece of metal is not zero, the metal is not in equilibrium.

E. The net electric field at any location inside a block of copper is zero if the copper block is in equilibrium.