일반물리학 2 — Magnetic Fields: Problem 53

53 An electron of kinetic energy 600 eV circles in a plane perpendicular to a uniform magnetic field. The orbit radius is 12.5 cm. Find (a) the electron's speed, (b) the magnetic field magnitude, (c) the circling frequency, and (d) the period of the motion. (e) Through what potential difference would the electron have to be accelerated from rest to reach this kinetic energy?