The effect of increase in temperature on the number of electrons in...

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
C ${n}_{e}$ increases, resistance decreases
D ${n}_{e}$ decreases, resistance increases

Correct answer

C. ${n}_{e}$ increases, resistance decreases

Step-by-step solution

In case of semiconductors as the temperature increases the electrons in the valence band get excited and jump into the conduction band and hence the conductance increases resulting in the decrease of resistance. Thus, as temperature increases,

{n}_{e}

increases and resistance decreases.

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