Question

Draw a V-I graph for a conductor at two different temperatures. What conclusion do you draw from your graph for the variation of resistance of conductor with temperature?

Answer 1

 

In the above graph, T₁ > T₂. The straight line A is steeper than line B, which leads us to conclude that the resistance of a the conductor is more at high-temperature T₁ than at low-temperature T₂. Thus, we can say that the resistance of a conductor increases with an increase in temperature.