How does the doping increase the conductivity of semiconductor ?

The conductivity of semiconductors

If temperature increases, conductivity of semiconductor will be –

On increasing temperature, the conductivity of pure semiconductors

Is it difficult to make an intrinsic semiconductor? Name two factors on which the electrical conductivity of intrinsic semiconductor at a given temperature depends. How does the conductivity of a semiconductor change with the rise in its temperature?

why does the electrical conductivity of semiconductors increse with rise in temperature?

When an impurity is doped into an intrinsuc semiconductor,the conductivity of the semiconductor

When on impurity is doped into an intrinsic semiconductor, the conductivity of the semiconductor