These Bitesize pages will help if you need to recap on the basics of magnets. A magnetic field is produced whenever current flows through a wire. The magnetic field is represented by a series of concentric circles around the wire, as shown below. Magnetic field lines around a current carrying wire. image: physick wiki The direction ... <a title="charged particles in magnetic fields" class="read-more" href="https://mrmackenzie.co.uk/2021/11/charged-particles-in-magnetic-fields/" aria-label="Read more about charged particles in magnetic fields">Read more</a>