Solution to task 437 from Chertov´s for extramural stud

Solution to task 437 from Chertov´s for extramural stud

437. The proton passed the accelerating potential difference U = 300 V and flew into a uniform magnetic field (B = 20 mT) at an angle α = 30 ° to the lines of magnetic induction. Determine the step h and the radius R of the helical line along which the proton will move in the magnetic field.