1. Tardigrade
  2. Question
  3. Physics
  4. Assertion: Insulators do not allow flow of current through themselves. Reason: They have no free charge carriers.

Question Error Report

Thank you for reporting, we will resolve it shortly

Back to Question

Q. Assertion: Insulators do not allow flow of current through themselves.
Reason: They have no free charge carriers.

AIIMSAIIMS 1997Semiconductor Electronics: Materials Devices and Simple Circuits

Solution:

In an insulator, the valance band is completely filled and the conduction band is completely empty. There is no charge carriers at all in the conduction band. Moreover as the energy gap Eg $>>KT$, where T is the room temperature, so no electron can jump from the valance band to the conduction band at low temperatures and even at higher temperatures.
image