Description

For demonstrating the conversion of electric energy into mechanical energy. A star shaped copper disc 90mm diameter, rotatable vertically on pair of adjustable centres and dipping into small mercury trough between the vertical limbs of a small horseshoe magnet on a wooden base 150x100mm, disc adjustable vertically on a metal pillar 75mm high which is connected to one of the two terminals mounted on the base. The other terminal connected to the mercury trough. It operates on 4V. Supplied without mercury.