Assertion: If the temperature of a semiconduc | vedclass

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(A) In semiconductors,the energy gap between the conduction band and the valence band is small $(\approx 1 \ eV)$.Due to a rise in temperature,electro

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If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.

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(A) In semiconductors,the energy gap between the conduction band and the valence band is small $(\approx 1 \ eV)$.Due to a rise in temperature,electrons in the valence band gain thermal energy and can jump across this small energy gap into the conduction band.As the number of charge carriers increases,the conductivity of the semiconductor increases.Since conductivity is inversely proportional to resistance,the resistance of the semiconductor decreases.Therefore,the Reason correctly explains the Assertion.

Assertion: If the temperature of a semiconductor is increased,then its resistance decreases.
Reason: The energy gap between the conduction band and the valence band is very small.

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Assertion: If the temperature of a semiconductor is increased,then its resistance decreases.Reason: The energy gap between the conduction band and the valence band is very small.