CBSE Class 10 Answered
Does Resistivity increases with increase in temperature, and decreases with decrease in temperature?
Asked by rathee95abh | 17 Sep, 2015, 03:08: PM
Expert Answer
Yes, it does. In the metal, the atoms are in state of vibrating motion when the temperature increases, the amplitude of vibration will increases more and also increases the speed of the carriers of current i.e. electrons. In this process, free electrons collide with ions while drifting towards the positive end of the conductor more often which decreases the relaxation time. Hence, electrical resistivity of conductor increases with increase in temperature and decreases with decrease in temperature.
Answered by Priyanka Kumbhar | 18 Sep, 2015, 09:07: AM
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