Solution to task 435 from Chertov´s for extramural stud

Solution to task 435 from Chertov´s for extramural stud

435. The charged particle passed the accelerating potential difference U = 100 V and, having flown into a uniform magnetic field (B = 0.1 T), began to move along a helical line with a pitch of h = 6.5 cm and a radius of R = 1 cm. Determine the ratio of the particle charge to its mass.