Demonstrator is a visual aid for physics in middle school. It can be used to show the Lorentz force which produced by magnetic feld affecting the electron beam (or charged ion current).

It consists of coil, the transparent cylindrical tank for liquid, electrode of pillar, annular electrode, ampere meter and con­trol switch, etc.

Operating conditions:

Power source of coil: through resistance-capacitance redue ing voltage and rectifer flter, we can get the DC operating power from AC 220V±220V,50Hz.

Power source of solution: DC 2V-12V, current: 2A, supplied by external source

Environment requirement: temperature: 0°C-40°C, relative humidity: 80%