BITSAT2023PhysicsSemiconductorsActual
The effect of increase in temperature on the number of electrons in conduction band ( n _ e ) and resistance of a semiconductor will be as:
Options
- ABoth n _ e and resistance decrease
- BBoth n _ e and resistance increase
- Cn _ e increases, resistance decreases
- Dn_e decreases, resistance increases
Correct answer
C. n _ e increases, resistance decreases
Step-by-step solution
When temperature increases, more electrons excite to conduction band and hence conductivity increases, therefore resistance decreases.