Which of the following are true? Check all that apply. “Static equilibrium” means that no charges are flowing. (A) If the net electric field at a particular location inside a piece of metal is not...

Which of the following are true? Check all that apply. “Static equilibrium” means that no charges are flowing.

(A) If the net electric field at a particular location inside a piece of metal is not zero, the metal is not at static

equilibrium.

(B) The net electric field inside a block of aluminum is zero under all circumstances.

(C) The net electric field at any location inside a block of copper is zero if the copper block is at static equilibrium.

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

(E) In static equilibrium, there is no net flow of mobile charged particles inside a conductor.