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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?
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Solution
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.
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