Rotation Liquid Mercury generated by a magnetic field

In this experiment the mercury is placed inside a wooden disk and on the sides with two aluminum circles and in the center a circular magnet. When current flows through the aluminum conductor, it generates a magnetic field. This condition causes liquid mercury to rotate as it is a very conductive metal. The working voltage is about 2VDC and a current of 27-28 amps, controlled by an inverter. The speed of rotation of mercury depends on the supplied voltage. As the tension increases, the mercury escapes from the bowl. * The system does not work in alternating current. *The white powder is talc, it makes the movement of mercury visible.