What is conductor ?

Explanation

The substances which have an abundance of free electrons are called conductors. These free electrons move at random throughout the conductor at a givne temperature. In general due to this random motion, three is no net transfer of charges from one end of the conductor to other end and hence no current. When a potential difference is applied by the battery across the ends of the conductor, the free electrons drift towards the positive terminal of the battery, producing a net electric current.