## Homopolar Motor 2

This video demonstrates how a simple homopolar motor is made using a screw and a small neodymium magnet. The simplest possible motor one can make, it can be used to teach concepts at various levels. For lower secondary students, they can learn about conversion of energy forms while upper secondary students can learn about magnetic

## Electromagnetism Lecture

I enjoy lecturing on topics like Superposition and Electromagnetism in the GCE A-level syllabus as they lend themselves well to the use of fun demonstrations that I can perform in front of the audience. One of the recent demonstrations that I did was to demonstrate the measurement of the magnetic force acting on a wire

## Measuring the Force on a Current-Carrying Conductor

The force acting on a current-carrying conductor is given by where B is the magnetic flux density, I is the current, l is the length of the wire and is the angle between the current and the magnetic field. It can be measured in directly using a weighing scale as described below: Materials An electronic

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## Homopolar Motor 1

A homopolar motor is a simple electric motor that does not require the use of a commutator. The electric current flows in a fixed direction within the wires of the motor. The following are instructions on how to construct this simple teaching tool that can be used to demonstrate how a motor works, as well