Solution to task 408 from Chertov´s for extramural stud

Solution to task 408 from Chertov´s for extramural stud

408. A current I = 80 A flows along a thin ring. Determine the magnetic induction B at point A, equidistant from the points of the ring at a distance r = 10 cm (Fig. 56). Angle α = π / 6.