You are given two bars of same resistance, one of them is a conductor and the other is a semiconductor. How will you distinguish them experimentally?

Explanation

At first both the rods are connected separately with the same source of electricity at room temperature and currents passing through them are measured. After that the temperature of both the rods is increased. Them they are again connected with the same source of electricity and currents through them are again measured. The bar through which the flow of current increases due to rise in temperature is a semiconductor.