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

Find the B-field at the center of the square loop located above the xy plane, with width (w), and current I rotating counter-clockwise.

2. Relevant equations

Here is the given equation:

B= [(μ_{o}*I*a_{Ф})/(4∏*ρ)](cosα_{2}– cosα_{1})

The final answer is for the B-field about the loop is:

B= [(4μ_{o}*I)/(∏*w*(√2))]a_{z}

How do I obtain this answer? I am having trouble with the angles that I am supposed to use.

3. The attempt at a solution

I used (w/2) for the radial component, ρ. I used 45 degrees for α_{2}, and 90 degrees for cosα_{1}, and this is obviously wrong. Which angles do I use to get the correct angle?

**Physics Forums | Science Articles, Homework Help, Discussion**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Electromagnetics = Biot-Savart Law around square path

**Physics Forums | Science Articles, Homework Help, Discussion**