Bell 600 gaussmeter manual6/13/2023 The trajectory of the speeding electrons moving through the magnetic field is made visible by a small amount of mercury vapor.Īn electron moving in a uniform magnetic field travels in a helical path around the field lines. A known current flows through a pair of Helmholtz coils and produces a magnetic field. The central piece of this apparatus is an evacuated electron-beam bulb with a special anode. An electron beam of a specified energy, and therefore a specified speed, may be produced conveniently in an \(e/m\) apparatus. Fortunately, the ratio of these two fundamental constants can be determined easily and precisely from the radius of curvature of an electron beam traveling in a known magnetic field. ![]() Measuring separately the electric charge (\(e\)) and the rest mass (\(m\)) of an electron is a difficult task because both quantities are extremely small (\(e\) = 1.60217733×10 -19 coulombs, \(m\) = 9.1093897×10 -31 kilograms). Heathkit Regulated Power Supply Model PS-4. ![]()
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