Question

For a semiconductor, temperature co-efficient of resistance is ___________.

Answer 1

Semiconductors usually have 4 valence electrons which form covalent bond by sharing electrons with nearby atoms. At zero kelvin, such a material will not conduct electricity as like as a perfect insulator.

When the temperature of the material increased, the electron absorbs the thermal energy and covalent bond breaks and starts to conduct.

So, as temperature keeps on increasing, then the conduction also increases and by decreasing the resistance. We know, the coefficient of the temperature is inversely proportional to the temperature applied.