I'm translating the problem from portuguese to english, so I'm sorry if there are errors.(adsbygoogle = window.adsbygoogle || []).push({});

1. The problem statement, all variables and given/known data

Determine the magnetic field on the center of the circumference produced by the current in the conducting wire (the circumference is made of conducting wire too). The current goes from left to right, and on the circumference it's clockwise.

2. Relevant equations

Biot-Savart Law: [itex]B = \frac{\mu_0}{4 \pi} \ \int \frac{ I \ \vec{dl}\times \hat{r}}{r^2}[/itex]

3. The attempt at a solution

I can't relate dl with r (the distance from dl to the center) nor the angle, which I must do to compute the integral.

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

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: Magnetic field produced by a current

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