5H30.05 - e/m - TV and Magnet

Code Number:
Demo Title:
e/m - TV and Magnet
Measure e/m of Electrons
Area of Study:
Electricity & Magnetism
Old Black and White or Color TV and Horseshoe Magnets or Large Neodymium Magnets.

An old TV may be used to show beam deflection when a magnet is brought close to the TV screen.

  • James Lincoln and Nick Moore, "Five Fresh Lorentz Force Demos", TPT, Vol. 57, #8, Nov. 2019, p. 572.
  • Marcelo M. F. Saba, "Right-Hand Rule with Magnet and Monochrome Monitor", TPT, Vol. 36, #3, Mar. 1998, p. 190.
  • "Black and White TV and Magnetism",  The Exploratorium Science Snackbook, p. 9.1 - 9.2.
  • Ron Hipschman,  "Color Television and Magnetism",  Exploratorium Cookbook III, p. 139.1 - 139.2.
  • Brian Jones and Matt Fackelman,  "Rainbow Vision - Don't Try This On Your TV!",  Don't Forget the Duct Tape! - The How and Why of the Experiments of the Little Shop of Physics - A Work in Progress, p. 109.
  • "The Cathode Ray Oscilloscope", Selective Experiments in Physics, CENCO, 1962.

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