Question

3. Which one of the following is a good conductor of
electricity?
(A) Iron
(B) Plastic
(C) Wood
(D) Glass​

Answer 1

iron is good conductor of electricity and heat

Answer 2

(A) Iron  is a good conductor of  electricity

Explanation:

From the above given, Iron is the good conductor because of its very tight molecular arrangement. Electricity flows on the medium of low resistance. As iron possess much of the electron in its chemical arrangements, which paves the way for the free flow of electrons through out it’s molecular structure. As electricity is the general term which denotes the flow of electron. This free flow of electron brings iron as the better conductor of electricity among the given and compared to other elements in the periodic table with few exceptions.