Solution to task 454 from Chertov´s for extramural stud

Solution to task 454 from Chertov´s for extramural stud

454. A single-layer winding (turn to turn) of wire with a diameter of d = 0.2 mm is laid on a long cardboard frame with a diameter of D = 5 cm. Determine the magnetic flux Ф created by such a solenoid at a current strength I = 0.5 A.