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

Finding the magnetic field

1. Homework Statement

Two parallel wires are 5.60 cm apart and carry currents in opposite directions, as shown in the figure.

Find the magnitude of the magnetic field at point P due to two 1.50-\,{\rm mm} segments of wire that are opposite each other and each 8.00 {\rm cm} from P.


2. Homework Equations



3. The Attempt at a Solution
I don't know what to us for r or i'm using the wrong equation

but i used muenot Itop/(2pi r) + muenot I bottom/(2pi r) where r was the sqrt(8^2 +8^2)
1. Homework Statement



2. Homework Equations



3. The Attempt at a Solution
1. Homework Statement



2. Homework Equations



3. The Attempt at a Solution
1. Homework Statement



2. Homework Equations



3. The Attempt at a Solution
 

Answers and Replies

I think you should use the Biot-Savart Law.
 
554
0
Find the magnitude of the magnetic field at point P due to two 1.50-\,{\rm mm} segments of wire that are opposite each other and each 8.00 {\rm cm} from P.
Can you rephrase that line so it is readable? I don't know what they are asking now...

If they're asking the magnetic field for only small segments of the wire than yes, use Biot-Savart.

If they're asking the magnetic field for large segments of the wire (nearing infinite in relation to the other distances) then you can probably use Ampere's law ( int B * dl = ...)
 
got it

I can't post pics yet. but i got it anyway I was using the wrong thing for r on each magnetic field.
 

Related Threads for: Finding the magnetic field

  • Last Post
Replies
0
Views
1K
  • Last Post
2
Replies
34
Views
2K
  • Last Post
Replies
1
Views
928
  • Last Post
Replies
3
Views
2K
  • Last Post
Replies
5
Views
10K
  • Last Post
2
Replies
36
Views
1K
  • Last Post
Replies
4
Views
371
  • Last Post
Replies
5
Views
3K
Top