Choose the FALSE statement from the following. (a) Generally, in conductors the valence and conducting bands overlap. (b) The resistivity of a semiconductor increases with increase in temperature (c) The conductivity of a semiconductor increase with increase in temperature (d) Substances with energy gap of the order of 10 eV are insulators

Answer: (b). (a) True: in conductors the bands generally overlap. (b) False: resistivity of a semiconductor decreases as temperature rises (more electron-hole pairs). (c) True: conductivity increases with temperature. (d) True: Eg ~ 10 eV means an insulator. So the false statement is (b).

Choose the FALSE statement from the following. | MHT CET 2021 (22 Sep, Shift 1)

Q14MHT CET 2021 · 22 SEP · SHIFT 1Medium

Energy Bands in Solids

Choose the FALSE statement from the following.

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Answer: (b)

(a) True: in conductors the bands generally overlap.
(b) False: resistivity of a semiconductor decreases as temperature rises (more electron-hole pairs).
(c) True: conductivity increases with temperature.
(d) True: $E_g \sim 10\text{ eV}$ means an insulator.
So the false statement is (b).

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Energy Bands in Solids question from MHT CET 2021 (22 Sep, Shift 1)

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