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

Question

Assertion: When the temperature of a semiconductor is increased, then its resistance decreases. Reason: The energy gap between conduction band and valence band is very small. (A) If both Assertion and Reason are true and the Reason is a correct explanation of the Assertion (B) If both Assertion and Reason are true but Reason is not a correct explanation of the Assertion (C) If Assertion is true but the Reason is false (D) If both Assertion and Reason are false

Tardigrade Admin · Accepted Answer

The energy gap between the valance and the conduction band is very small, so by raising the temperature we can get more electrons flipping from valance to conduction bond thereby increasing the carriers of electricity in the semiconductors. That’s why in semiconductors we have negative temperature coefficient of resistance and so the resistance decreases with temperature.

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

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

If both Assertion and Reason are true but Reason is not a correct explanation of the Assertion

If Assertion is true but the Reason is false

If both Assertion and Reason are false

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