Question

Which of the following is the best electrical conductor of electricity?
(A)- Gold
(B)- Silver
(C)- Copper
(D)- Aluminium

Answer 1

Hint: All metals are the good conductor of electricity as they have free electrons in the outermost shell or valence shell for the conduction of electricity from one point to another point.

Complete step by step answer:
 In the question, all the above-given options belong to the category of metals so they all will conduct electricity. Now we have to evaluate the best electrical conductor of electricity among them and the best electrical conductor will follow the following points:
-It should have free electrons in the outermost shell for free movement of electrons from the valence band to the conduction band.
-It should have very low resistance in it so that flow of electricity will occur very easily.
The above two criteria are fulfilled by the silver (${\text{Ag}}$) metal as it is available in pure form in the earth and having very low impurity and resistance in it. So that silver is the best electrical conductor of electricity among the above-given options and order of conductivity of them is as follow:
Silver > Gold > Copper > Aluminium So, the correct answer is “Option A”.

Note: Many of you may think that copper is the best conductor of electricity as in daily life we use copper wires generally as an electrical wire, but this assumption is wrong. Silver is not used commercially because of the expensive or high rate of it, but it is the best conductor of electricity.