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.
Text Solution
Verified by ExpertsThe correct answer is:
D
The resistivity of a semiconductor decreases temperature, the electrons in the valence band gain sufficient thermal energies to jump to the conduction band. As the number of electrons in the conduction band increases, so conductivity increases and resistivity decreases. Both assertion and reason are incorrect.
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