Barlow's Wheel apparatus

The Barlow's Wheel Apparatus is a classic physics demonstration tool used to illustrate the principles of electromagnetism and electromagnetic rotation. It features a metal wheel mounted on an axis, which is partially immersed in a conductive liquid such as mercury. An electric current passes through the wheel and liquid, creating a magnetic field interaction that causes the wheel to rotate.

Key features:

Sturdy metal wheel supported on an axis with electrical contacts.

A container with conductive liquid (often mercury) for current flow.

Basis for demonstrating how electric currents and magnetic fields produce mechanical motion.

Frequently used in educational settings to introduce motors and electromagnetic forces.

Visible rotation provides a clear and engaging physical demonstration of electromagnetic effects.

This apparatus helps students understand the working principle behind electric motors and electromagnetic force, linking theory with observable experiments.