Barlows wheel apparatus, Nairobi Industrial Area

Barlow’s wheel, named after the English mathematician and physicist Peter Barlow, is an early demonstration of electromagnetic induction. It consists of a simple apparatus used to generate electricity by rotating a copper disc between the poles of a magnet. When the disc spins, it cuts across the magnetic field lines, inducing an electric current in the disc due to Faraday’s law of electromagnetic induction.

The apparatus typically consists of a horizontal axle with a copper disc mounted on it, positioned between the poles of a magnet. The copper disc is connected to a circuit, and when it rotates, an electromotive force (emf) is induced in the disc, causing electric current to flow through the circuit.

Barlow’s wheel is a classic demonstration in physics education to illustrate the principles of electromagnetic induction and the generation of electric current. It played a significant role in the development of electrical machinery and the understanding of electromagnetism.