Electrical conductivity of a semiconductor

Electric conductivity of a semiconductor:

Electrical conductivity of semiconductor A… with rise in temperature . Here , A refers to

(A) Electrical conductivity of semiconductors increases with increasing temperature. (R) With increase in temperature, large number of electrons from the valence band can jump to the conduction band

Statement I : Electrical conductivity of semiconductors increases with rise in temperature. Statement II : There is a small energy gap between conduction band and valence band.

Statement I : Electrical conductivity of semiconductors increases with rise in temperature. Statement II : There is a small energy gap between conduction band and valence band.

What is the effect of doping on electric conductivity of a semiconductor ?

The electrical conductivity of semiconductor is

The electrical conductivity of semiconductors

The electrical conductivity of semiconductor is