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Pie shaped loop of radius a carraying a current I

  • Thread starter aimee
  • Start date
I have been trying to do this for hours...

I know I'm supposed to use the Biot-savart Law: dH = IdLsin(theta)/4pir^2

Determine the magnetic field at the apex of the pie-shaped loop shown below. Ignore the contributions of the field due to current int he small arcs near 0.


Doc Al

What have you done so far?

If you write the Biot-Savart law like this, you may see a few shortcuts:
[tex]d\vec{B} = \frac{\mu_0 I}{4 \pi} \frac{d\vec{L} \times \hat{r}}{r^2}[/tex]

What can you conclude about the contribution to the field due to the current in the straight wire pieces? What about the curved piece?

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