Q. 24.0( 66 Votes )

How does the mobility of electrons in a conductor change, if the potential difference applied across the conductor is doubled, keeping the length and temperature of the conductor constant ?

Answer :

If the drift velocity of the electrons is . Then, the mobility is



where is the electric field strength.


Also, if the electron density is , area of cross section is A, then



Also,



Combining all, we get



Now,



where is the length of conductor.


Thus,



Hence, mobility is independent of the voltage applied. Thus it remains same.


Rate this question :

How useful is this solution?
We strive to provide quality solutions. Please rate us to serve you better.
Related Videos
All About Faraday's law55 mins
Know all about Infertility39 mins
Revision Class | All Formulas of Electrodynamics63 mins
Get to know all about Immune SystemFREE Class
Know all about Colligative Properties50 mins
Know All About Types of Relations53 mins
Try our Mini CourseMaster Important Topics in 7 DaysLearn from IITians, NITians, Doctors & Academic Experts
Dedicated counsellor for each student
24X7 Doubt Resolution
Daily Report Card
Detailed Performance Evaluation
view all courses
RELATED QUESTIONS :