(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

A circular 10 turn coil that has a radius of 0.05 m and current of 5A lies in the xy plane with a uniform magnetic field B = 0.05 T i + 0.12 T k (i and k are the unit vectors). What's the potential energy for the system???

2. Relevant equations

U = -m*B where m is the dipole moment = I*A

3. The attempt at a solution

B = sqrt((0.05 T)^2 + (0.12 T)^2) = 0.13 T

So for this I would get U = -0.00511 J, but the answer key says -0.000472 J... where's the mistake???

**Physics Forums - The Fusion of Science and Community**

# Potential energy for magnetic fields

Know someone interested in this topic? Share a link to this question via email,
Google+,
Twitter, or
Facebook

Have something to add?

- Similar discussions for: Potential energy for magnetic fields

Loading...

**Physics Forums - The Fusion of Science and Community**