Calculating Magnetic Field Using Biot-Savart Law for Concentric Arcs

[Winzer]

Homework Statement

The closed loop shown in the figure below carries a current of 6.90 A in the counterclockwise direction. The radius of the outer arc is 65.0 cm, that of the inner arc is 41.0 cm. Find the magnitude of the magnetic field at point P if the angle 60 deg.

Homework Equations

Savart
$$db=\frac{uI dl x r}{4\pi r^3}$$
dl and r are vectors
x means cross product

The Attempt at a Solution

Basically integrate the outer wire, the inner wire and add them up right?

 

[Kurdt]

You will have to split the question into 4 parts to find the contribution of the 4 different sections. The cross product is useful here as it simplifies the different parts greatly.

 

[Winzer]

I figured it out.