There are many ways to use a magnet. To illustrate their versatility, here are a few examples:
Computer memories
Small ring magnetic discs called ‘ferrite cores’ are used in some computers as a magnetic memory. Each core in a computer relates to a single bit of information in a computer’s memory.
A type of magnet called a ‘hand magnet’ is used for lifting laser cut steel out of the original steel sheet after it has been cut. The magnet’s extended handle allows the user to carry the sheet at arm’s length, preventing any injury caused by the sharp edges of the newly-cut steel.
For more information see our section: Hand magnets
Teaching
Horseshoe magnets can be used in education, to teach school children about the magnetic field, using iron filings.
Magnets are used inside the pick-ups in guitars to create different tones.
The magnet is placed inside the pick-up, with a length of wire coiled around it to create a magnetic field. Whenever a guitar string vibrates in that magnetic field, the coil detects the changes and then creates a voltage, thus producing a sound.
Welding
Weld clamp magnets can be used to hold pieces of ferromagnetic materials in position for tack welding. Tack welding involves using a series of small welds to align pieces of metal securely before completing with a final weld. Magnets can help to weld together things such as steel gates, metal stair steps and bicycle frames.
Magnetic mounting pads can be used to attach signs to car roofs and are particularly helpful when a sign needs to be attached and removed easily, without damaging the vehicle. This is often useful for advertising purposes.