The effect of increase in temperature on the number of electrons in conduction band ( ne) and resistance of a semiconductor will be as: (a) ne decreases, resistance increases (b) Both ne and resistance increase (c) ne increases, resistance decreases (d) Both ne and resistance decrease

Answer: (c). Higher T gives more electrons enough energy to jump across the band gap, so ne in the conduction band increases. More carriers means lower resistance. So the answer is (c) ne increases, resistance decreases.

The effect of increase in temperature on the number of electrons in… | JEE Main 2023 (31 Jan, Shift 1)

Q30JEE Main 2023 · 31 JAN · SHIFT 1Easy

Intrinsic & Extrinsic Semiconductors

The effect of increase in temperature on the number of electrons in conduction band ( $n_e$ ) and resistance of a semiconductor will be as:

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Answer: (c)

Higher $T$ gives more electrons enough energy to jump across the band gap, so $n_e$ in the conduction band increases.
More carriers means lower resistance.
So the answer is (c) $n_e$ increases, resistance decreases.

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Intrinsic & Extrinsic Semiconductors question from JEE Main 2023 (31 Jan, Shift 1)

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