• Support PF! Buy your school textbooks, materials and every day products Here!

Free-electrom density

The question is...

A Hall probe is constructed from a semi-conducting material of thickness 0.4 millimeters. When 5 amps of current passes through the material a Hall voltage of .6 volts is produced when the probe is placed in a uniform magnetic field of 0.01 Tesla. Assuming the current is due to "free electrons" in motion, determine the following:
a. The "free electron density" of the semi-conducting material

b. The Hall voltage produced by the Hall probe when it is placed in a magnetic field of 0.3 Tesla


My opinion- I am mostly concerned with part a because I am lost. I am thinking you would use the equation for Coloumb's law Fe=ke*(q1*q2)/r^2 and solving for ke. Does it sound like I'm on the right track?

For part b I was thinking I would use DeltaV=E*d=vdBd

One of my main problems is just knowing what to plug in where. If anyone can help please do. Your assistance will be greatly appreciated! Thanks!
 

Answers and Replies

Related Threads for: Free-electrom density

  • Last Post
Replies
1
Views
1K
  • Last Post
Replies
4
Views
597
  • Last Post
Replies
4
Views
40K
Replies
2
Views
3K
Replies
2
Views
2K
Replies
7
Views
2K
Replies
1
Views
3K
Top