JEE MAIN - Physics (2003 - No. 25)
The difference in the variation of resistance with temperature in a metal and a semiconductor arises essentially due to the difference in the
crystal structure
variation of the number of charge carries with temperature
type of bonding
variation of scattering mechanism with temperature
Uitleg
When the temperature increases, certain bounded electrons become free which tend to promote conductivity. Simultaneously number of collisions between electrons and positive kernels increases