When the temperature of a semiconductor is increased, its resistance and electric conductivity respectively. (a) increases and decreases (b) decreases and decreases (c) increases and increases (d) decreases and increases

Answer: (d). Higher T creates more electron-hole pairs in a semiconductor. So resistance decreases and conductivity σ = e(neμe + nhμh) increases. So the answer is (d) decreases and increases.

When the temperature of a semiconductor is increased, its resistance… | MHT CET 2021 (23 Sep, Shift 2)

Q37MHT CET 2021 · 23 SEP · SHIFT 2Easy

Intrinsic & Extrinsic Semiconductors

When the temperature of a semiconductor is increased, its resistance and electric conductivity respectively.

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Answer: (d)

Higher $T$ creates more electron-hole pairs in a semiconductor.
So resistance decreases and conductivity $\sigma = e(n_e\mu_e + n_h\mu_h)$ increases.
So the answer is (d) decreases and increases.

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Intrinsic & Extrinsic Semiconductors question from MHT CET 2021 (23 Sep, Shift 2)

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