Demonstrate the Lorentz force and calculate the charge/mass ratio of an electron.

• Helmholtz coils and power supply unit are mounted in a wooden case with detachable front panel
• Adjustable, removable scale
• Vertically-oriented vacuum tube (bulb)
• 110 V/60 Hz AC
• Instructions included

This compact, self-contained unit is useful for demonstrating the Lorentz force exerted by magnetic fields on moving electrons and the deflection of moving electrons within an electric field. The charge-to-mass ratio (E/M) of the electron can be determined as well. It is great for teaching physics in a classroom demonstration and for grouped student experiments.