Question

Assertion: Electrical conductivity of semiconductors decreases with increasing temperature.
Reason: With increase in temperature, large number of electrons from the valence band can jump to the conduction band.

• A. If both assertion and reason are true and the reason is the correct explanation of the assertion.
• B. If both assertion and reason are true but reason is not the correct explanation of the assertion.
• C. If assertion is true but reason is false.
• D. If assertion Is false but reason is true.

Answer 1

The correct option is D If assertion Is false but reason is true.

Electrical conductivity of semiconductors increases with increasing temperature, as with increase in temperature large number of electrons from the valence band can jump to the conduction band.