1. Tardigrade
  2. Question
  3. Physics
  4. <B>Assertion: </B> A pure semiconductor has negative temperature coefficient of resistance. <B>Reason: </B> On raising the temperature, more charge carriers are released, conductance increases and resistance decreases.

Question Error Report

Thank you for reporting, we will resolve it shortly

Back to Question

Q. Assertion : A pure semiconductor has negative temperature coefficient of resistance.
Reason : On raising the temperature, more charge carriers are released, conductance increases and resistance decreases.

AIIMSAIIMS 2010Current Electricity

Solution:

The resistance of semiconductor decreases with a rise in temperature because of negative temperature coefficient of resistance. The reason being, on raising the temperature, more charge carriers are released, conductance increases and resistance decreases.
So, both assertion and reason are correct and reason is the correct explanation of the assertion.