Use band theory to explain the changes in the resistance of an intrinsic semiconductor as temper changes.

At low temperatures(0K), the conduction band is empty while the valence band if filled. As temperature increases, the electrons gain energy to go into the conduction band and leave positive holes in the valence band. The lattice vibration increase, but it is outweighed by increase in charge carriers. Hence the current increases and resistance decreases.

KG
Answered by Kutlwano G. Physics tutor

14950 Views

See similar Physics A Level tutors

Related Physics A Level answers

All answers ▸

What's the difference between Potential Difference and Electromotive Force


Use the kinetic theory of gases to explain why the pressure inside a container increases when the temperature of the air inside it rises. Assume that the volume of the container remains constant.


Calculate the threshold wavelength for a metal surface with work function of 6.2 eV.


How does stimulated emission work?


We're here to help

contact us iconContact ustelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

© MyTutorWeb Ltd 2013–2025

Terms & Conditions|Privacy Policy
Cookie Preferences