Why Insulator have negative temperature co-efficient of resistance

Wednesday, 6 November 2013

Why Insulator have negative temperature co-efficient of resistance




If insulators temperature rises it creates more free electrons than existed cooler state. These often increase the number of free electrons than offsetting the drift movement disorder caused by the increased molecular activity. So insulators resistance decreases with increasing temperature. For example, insulators have a negative temperature coefficient of resistance.



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