Electromagnetic forces

  • Thread starter poojarao
  • Start date
  • #1
15
0
Speed = distance/time and current = charge/time. Explain how F=BIl is actually the same equation as F= Bqv but considered for many charges in a group?

can someone please explain with working out please?

thanks
 

Answers and Replies

  • #2
1,179
5
Lets say that you had a wire with a length l. Lets say that traveling through that length is a net charge q, with an average velocity of v. v = distance/time, in which in this case, v = l/t. The current is I = charge/time = q/t. Therefore, F = B*q*(l/t) = B*(q/t)*l = BIl.
 
  • #3
15
0
thanks a lot!
 
  • #4
4,662
5
For clarity, these two equations (part of the Lorentz Force Law) are written as

F = l(I x B) = q(v x B)

where x indicates the cross product. meaning that the vectors F,I and B; or F,v,and B are all mutually orthogonal.
 
  • #5
Born2bwire
Science Advisor
Gold Member
1,779
21
The I/v vectors need not be orthogonal with the B vector.
 

Related Threads on Electromagnetic forces

Replies
1
Views
2K
Replies
3
Views
652
Replies
1
Views
2K
  • Last Post
Replies
5
Views
1K
  • Last Post
Replies
3
Views
7K
  • Last Post
Replies
9
Views
3K
  • Last Post
Replies
2
Views
2K
Replies
41
Views
15K
  • Last Post
Replies
8
Views
2K
Replies
7
Views
5K
Top