Solution to task 414 from Chertov´s for extramural stud

Solution to task 414 from Chertov´s for extramural stud

414. A short coil with a cross-sectional area S = 250 cm2, containing N = 500 turns of wire, through which a current of I = 5 A flows, is placed in a uniform magnetic field with an intensity H = 1000 A / m Find: 1) the magnetic moment pm of the coil; 2) the torque М, acting on the coil from the field side, if the coil axis makes an angle φ = 30 ° with the field lines.