An electron passes into a uniform electric field. Before entering the field, the velocity of the electron is perpendicular to the magnetic field. Which of the following diagrams shows the trajectory that the electron takes when it enters the uniform magnetic field?
An electron in a vacuum is accelerated across a potential difference of V. The charge of an electron is C, and an electron has a mass of kg. What is the speed of the electron once it has crossed the potential difference?
A beam of alpha particles in a vacuum is passed between two charged metal plates. Which of the following diagrams shows the trajectory that the alpha particles will follow when they pass between the plates? The red plate is the positively charged plate, and the blue plate is the negatively charged plate. Ignore the effect of gravity.