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I'm translating the problem from portuguese to english, so I'm sorry if there are errors.
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.
BiotSavart Law: [itex]B = \frac{\mu_0}{4 \pi} \ \int \frac{ I \ \vec{dl}\times \hat{r}}{r^2}[/itex]
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.
Homework Statement
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.
Homework Equations
BiotSavart Law: [itex]B = \frac{\mu_0}{4 \pi} \ \int \frac{ I \ \vec{dl}\times \hat{r}}{r^2}[/itex]
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.
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