How does the resistance of a wire depend on temperature?Draw a V-I graph to show the variation of resistance with temperature at two different levels.
Dear Student,
Resistance of a wire increases with increase in temperature. This is because, increase in temperature increases vibration of kernals which resist the flow of electrons and hence resistance increases. (Kernals refer to nucleus and electrons except the valence electrons)
V-I graph at two different temperatures is as below:
Here T2 > T1 and hence resistance, which is given by reciprocal of slope of V-I graph, is more at T2 than at T1.
Regards.
Resistance of a wire increases with increase in temperature. This is because, increase in temperature increases vibration of kernals which resist the flow of electrons and hence resistance increases. (Kernals refer to nucleus and electrons except the valence electrons)
V-I graph at two different temperatures is as below:
Here T2 > T1 and hence resistance, which is given by reciprocal of slope of V-I graph, is more at T2 than at T1.
Regards.