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Circular Orbit E/M (V 7)


Keyword: magnetic

Demonstration Description:
The circular path taken by an electron beam in a magnetic field is used to determine the charge-to-mass ratio of an electron. Magnetic deflection of the circular beam can be altered by use of Hemholtz coils. One video camera displays the circular beam. The tube can also be rotated causing the beam to take a spiral path. This is displayed to the class by use of another video camera.






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