Electrons in a Uniform Magnetic Field (1959)

The film demonstrates an experiment using an apparatus to observe the behavior of electrons in a uniform magnetic field. It explains how electrons are accelerated by an electron gun and then deflected by a magnetic field created by Helmholtz coils. The experiment measures the mass of an electron by analyzing the relationship between the magnetic field, the electric potential, and the radius of the electron’s circular path. The results consistently yield the mass of an electron as approximately 9.1 x 10^-31 kg, regardless of variations in voltage and magnetic field strength. Additionally, the film explores how the angle at which electrons are shot affects their trajectory, illustrating a helical motion when components of velocity are present both parallel and perpendicular to the magnetic field.

Keywords
electrons, magnetic field, electron gun, Helmholtz coils, mass of electron, kinetic energy, deflection, circular motion, helical trajectory, experiment
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