The effect of increase in temperature on the number of electrons in conduction band and resistance of a semiconductor will be as [2023]

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Solution

Q.
The effect of increase in temperature on the number of electrons in conduction band $(n_{e})$ and resistance of a semiconductor will be as [2023]

1 Both $n_{e}$ and resistance decrease

2 Both $n_{e}$ and resistance increase

3 $n_{e}$ increases, resistance decreases

4 $n_{e}$ decreases, resistance increases

Ans.
(3)

As temperature increases, more electron excite to conduction band and hence conductivity increases, therefore resistance decreases.

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Solution

Q. The effect of increase in temperature on the number of electrons in conduction band (ne) and resistance of a semiconductor will be as [2023]

1 Both ne and resistance decrease

2 Both ne and resistance increase

3 ne increases, resistance decreases

4 ne decreases, resistance increases

Ans. (3) As temperature increases, more electron excite to conduction band and hence conductivity increases, therefore resistance decreases.

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Q.
The effect of increase in temperature on the number of electrons in conduction band $(n_{e})$ and resistance of a semiconductor will be as [2023]

1 Both $n_{e}$ and resistance decrease

2 Both $n_{e}$ and resistance increase

3 $n_{e}$ increases, resistance decreases

4 $n_{e}$ decreases, resistance increases

Ans.
(3)

As temperature increases, more electron excite to conduction band and hence conductivity increases, therefore resistance decreases.