Magnetic Field Caused By Straight Wire Segment

  • Thread starter syhpui2
  • Start date
  • #1
28
0

Homework Statement



A short, straight wire segment of length l carries current I and is oriented so that it makes an angle of 30° with the horizontal. Point P is a distance r below the wire segment.

Which expression below is the best approximation for the magnetic field caused by the wire segment at point P?
(a) (μoIlcos30°) / (4π2)
(b) (μoIlsin30°) / (4π2)
(c) (μoIl) / (4π2)


Answer:A

pEYlf.png


http://i.imgur.com/pEYlf.png

Homework Equations




int[B dot dl]= miu I

The Attempt at a Solution



I used formula above, I take path as 2 pi l and it is wrong , answer is A
 

Answers and Replies

Related Threads on Magnetic Field Caused By Straight Wire Segment

  • Last Post
Replies
0
Views
2K
Replies
6
Views
3K
Replies
10
Views
3K
  • Last Post
Replies
6
Views
5K
Replies
1
Views
7K
Replies
5
Views
12K
Replies
3
Views
5K
Replies
3
Views
5K
Replies
2
Views
6K
Replies
1
Views
934
Top