Assertion : The resistivity of a semiconducto | vedclass

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(D) The Assertion is incorrect because the resistivity of a semiconductor decreases with an increase in temperature.As temperature increases,more vale

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If both the Assertion and Reason are incorrect.

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(D) The Assertion is incorrect because the resistivity of a semiconductor decreases with an increase in temperature.As temperature increases,more valence electrons gain sufficient thermal energy to jump across the forbidden energy gap into the conduction band.This increase in the number of charge carriers (electrons and holes) leads to an increase in conductivity,which implies a decrease in resistivity.The Reason is also incorrect because the mechanism described (vibration of atoms) is the primary cause for the increase in resistivity in metals,not semiconductors.

Assertion : The resistivity of a semiconductor increases with temperature.
Reason : The atoms of a semiconductor vibrate with larger amplitude at higher temperatures,thereby increasing its resistivity.

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Assertion : The resistivity of a semiconductor increases with temperature.Reason : The atoms of a semiconductor vibrate with larger amplitude at higher temperatures,thereby increasing its resistivity.