Choose all that are correct from the following. A.) A conductor can be charge-po

Question

Choose all that are correct from the following.

A.) A conductor can be charge-polarized only if electrons are transferred to the conductor from another material or out of the conductor to another material.

B.) If a conductor is positively charged by conduction, some positively charged electrons must have transferred to the conductor from another material.

C.) If material A is negatively charged by rubbing with material B, some electrons must have transferred from the material B to the material A.

D.) When an isolated metal rod (with no electrical connection to anywhere) is charge-polarized by induction, the net electrical charge on the whole metal is still neutral.

E.) Charge polarization is not possible on an insulator because the electrons in an insulator are not mobile.

Explanation / Answer

A.) Wrong

B) Wrong

C) correct

D) Correct

E) Wrong

Polarization can occur within insulators, but the process occurs in a different manner than it does within a conductor. In a conducting object, electrons are induced into movement across the surface of the conductor from one side of the object to the opposite side. In an insulator, electrons merely redistribute themselves within the atom or molecules nearest the outer surface of the object.

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