Question

Find the magnetic induction of the field at the point O of a loop with current I, whose shape is illustrated 

(a) in Fig. 3.60a, the radii a and b, as well as the angle φ are known; 

(b) in Fig. 3.60b, the radius a and the side b are known.

Answer 1

(a) From the Biot-Savart law,

So, magnetic field induction due to the segment 1 at O,