When finding Magnetic Field between two wires

  • Thread starter mistermill
  • Start date
  • #1
19
0

Homework Statement


11. Two parallel conductors, 1.0 cm apart, each carry 10 A of current in opposite directions. What is the magnetic field strength at the midpoint between these wires?


Homework Equations



B = μI/ 2πr


The Attempt at a Solution



I know that the magnetic field is doubled because the currents are in opposite directions.

Should r = 0.01 m or 0.005 m?

Is the r the distance between the two wires? I thought that r is the perpendicular distance from the wire to the point of field measurement, so that would mean 0.005 m.

I think the answer in my book is wrong, because it has r = 0.01 m.

Please advise.
 

Answers and Replies

  • #2
TSny
Homework Helper
Gold Member
12,955
3,309
Hi, mistermill.

You are correct. r is the perpendicular distance from the wire to the field point. So, r = .005 m for each current.
 

Related Threads on When finding Magnetic Field between two wires

Replies
4
Views
7K
Replies
3
Views
5K
Replies
7
Views
776
Replies
2
Views
2K
Replies
2
Views
2K
Replies
26
Views
5K
Replies
27
Views
10K
Replies
1
Views
12K
  • Last Post
Replies
2
Views
3K
Replies
1
Views
9K
Top