7 Quantum Physics 7.4 Specific charge of the electron
Specific charge of the electron e/m
P2510200
Experimental result.
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Principle Electrons are accelerated in an electric field and enter a magnetic field at right angles to the direction of motion. The specific charge of the electron is determined from the accelerating voltage, the magnetic field strength and the radius of the electron orbit. Tasks 1. Determination of the specific charge of the electron (e/m0) from the path of an electron beam in crossed electric and magnetic fields of variable strength.
National University of Science and Technology
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"MISIS" in Moscow, Russia
Cathode rays Lorentz force Electron in crossed fields Electron mass Electron charge
e/m - Observation Chamber Function and Applications
Main articles Narrow beam tube Helmholtz coils, one pair Power supply, 0...600 VDC Power supply, universal e/m - Observation Chamber Digital multimeter 2010
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Observation chamber for covering the e/m experiment (Helmholtz coils and narrow beam tube). Benefits ▪ parallax-free measuring of turning radii of electrons ▪ measuring of any turning radii of electrons, operation under normal lightning conditions, protection of the narrow beam tube due to less intensities required Equipment and Technical data ▪ Covering Box out of hard paper with observation window and connection openings, Dimensions LxWxH (mm): 550x310x470, Mirror with Scale 06959-01
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