The hint is to use the Biot-Savart law... (Hint: it often simplifies the integration to make your variable of integration theta...)1. Homework Statement
I am trying to find the magnetic field at the point in the middle of the picture can someone give a hint on how to approach the problem?
2. Homework Equations
3. The Attempt at a Solution
No. Biot-Savart:so thus this integral work :
B= ([tex]\mu[/tex]*I)/(4*pi*x)[tex]\int[/tex] between(-pi/4) and (pi/4) of cos ([tex]\theta) d\theta[/tex]
The limits come from the geometry of the diagram. You really should be able to figure that part out.yes the picture with the angle is exactly what I was thinking....what are the limits for the integral angles???