5H30.10 - Oscilloscope Spot
Demonstrate electron beam deflection by a magnetic field as a moving spot on the screen.
InstructionsAn old oscilloscope which has been removed from its case is turned on. The spot on the screen can be made larger by defocusing it. If a bar magnet is now brought up to the side of the tube, the spot will move about the screen showing the effect of the magnet on the electron beam.