The electrical conductivity of pure germanium can be increased by

The electrical conductivity of pure silicon can be increased by

Write two ways by which the electrical conductivity of a semiconductor can be increased.

Why does the electrical conductivity of germanium crystal increase when it is doped with gallium?

The electrical conductivity of semiconductors ……. With increase of temperature.

Assertion (A) : The electrical conductivity of a semiconductor increases with increase in temperature. Reason (R ) : With increase in temperature, large number of electrons from the valence band can jump to the conduction band.