Single Coil-Loop

  • Thread starter kopinator
  • Start date
  • #1
kopinator
41
1
A single-coil loop of radius r = 6.50 mm, shown below, is formed in the middle of an infinitely long, thin, insulated straight wire carrying the current i = 29.0 mA. What is the magnitude of the magnetic field at the center of the loop?

B(loop)= μ_0_*I/2R
B(wire)= μ_0_*I/2pi*d
Superposition Principle: Bnet= ƩB

Initially, I only used B(loop) to try to find the answer but that was wrong and my hw gave me a hint about using the Superposition Principle. I can find the B(loop) but what I don't know is how to find d for the B(wire).
 

Answers and Replies

  • #2
UltrafastPED
Science Advisor
Gold Member
1,912
216
You can use B(wire) at the distance r=radius of loop ... and work your way around the loop, adding a contribution for each segment of the loop.

By symmetry all of the contributions are the same, except that they have different orientations.

You are only required to provide an answer for the center of the loop ...
 

Suggested for: Single Coil-Loop

  • Last Post
Replies
3
Views
3K
  • Last Post
Replies
4
Views
7K
Replies
1
Views
3K
Replies
27
Views
4K
Replies
8
Views
273
Replies
2
Views
3K
Replies
4
Views
5K
Replies
8
Views
2K
Replies
1
Views
2K
Top