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

15195 Views

See similar Physics A Level tutors

Related Physics A Level answers

All answers ▸

Suggest which particles will be emitted as K-40 decays to Ca-39:


An atom can become excited by the absorption of photons. Explain why only photons of certain frequencies cause excitation in a particular atom.


Using the substitution u=cosx + 1, show that the integral of sinx e^cosx+1 is equal to e(e-1), for the values of x between x=π/2 and x=0


Explain how fluorescent tubes work


We're here to help

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

MyTutor is part of the IXL family of brands:

© 2025 by IXL Learning