-In a uniform magnetic field, electrons starts to move with an acceleration from rest through a potential difference of 400 V. The electrons travel along a circular path because of the magnetic force exerted on them, and the radius of the path is measured to be 5,5 cm. If the magnetic field is perpendicular to the beam (a) what is the magnitude of the field? (b) what is the angular speed of the electrons? (mass of the elecron: 9,11x10 kg charge of the electron: 1,6×101C)

-In a uniform magnetic field, electrons starts to move with an acceleration from rest through a potential difference of 400 V. The electrons travel along a circular path because of the magnetic force exerted on them, and the radius of the path is measured to be 5,5 cm. If the magnetic field is perpendicular to the beam (a) what is the magnitude of the field? (b) what is the angular speed of the electrons? (mass of the elecron: 9,11x10 kg charge of the electron: 1,6×101C)