A beam of electrons (of charge qe and mass m) is shot into a region of uniform magnetic field with a speed of 50m/s. They exit the region of uniform magnetic field opposite the direction they had entered. How strong must the magnetic field be such that each electron stayed in the region for a total of 10 ms? m 0.314 m а. c. 314- 9. m O 639 m

A beam of electrons (of charge qe and mass m) is shot into a region of uniform magnetic field with a speed of 50m/s. They exit the region of uniform magnetic field opposite the direction they had entered. How strong must the magnetic field be such that each electron stayed in the region for a total of 10 ms? m 0.314 m а. c. 314- 9. m O 639 m