The resistance of a semiconductor on heating

remains constant
decreases
increases
None of the above

The correct answer is (b). The resistance of a semiconductor decreases on heating. This is because the increase in temperature causes the electrons to move more freely, which in turn decreases the resistance.

Option

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(a) is incorrect because the resistance of a semiconductor does not remain constant on heating. Option (c) is incorrect because the resistance of a semiconductor decreases on heating, not increases. Option (d) is incorrect because the resistance of a semiconductor does change on heating.
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