The Copper Cubit

10/22/2025

Mobile "Atoms in Space".

08/13/2025

There is an AA battery sitting on a magnet core, covered by a copper sleeve. A homopolar motor creates rotational movement because of what is known as the Lorentz force.
What’s happening is that electrical current is flowing from the positive terminal of the battery to the negative and into the magnet. This current then flows from the centre of the magnet to the edge where the wire connects, it travels up the wire back to the positive terminal of the battery and the circuit is complete. But how does this generate movement you may well ask? Well, the key is the direction of the current and the magnetic field produced by the permanent magnet. It is possible to turn a homopolar motor into a homopolar generator. If the conducting wire is physically turned, this motion will produce a current and a DC voltage between the battery terminals.

08/05/2025