Temporary Magnets

Temporary magnets are objects that act like permanent magnets when they are within a strong magnetic field, but lose their magnetism once the magnetic field is removed. Unlike permanent magnets, temporary magnets only exhibit magnetic properties under certain conditions.

How do Temporary Magnets Work?

Temporary magnets can be created by placing a magnetic material, such as iron or steel, within a strong external magnetic field. The external magnetic field aligns the magnetic domains within the material, causing it to become magnetized. This alignment of the domains creates a temporary magnetic force within the material. However, once the external magnetic field is removed, the magnetic domains lose their alignment and the object loses its magnetism.

Examples of Temporary Magnets

Some common examples of temporary magnets include paperclips, nails, and other objects made of iron or steel. When these objects are exposed to a strong magnet, they can become temporarily magnetized and exhibit magnetic properties. However, once the external magnet is removed, they lose their magnetism.

Uses of Temporary Magnets

Temporary magnets have various applications in everyday life. They are used in devices such as electromagnets, which rely on temporary magnetism to create a magnetic field when an electric current flows through a coil of wire wrapped around a magnetic material. Electromagnets are used in a wide range of devices, including electric motors, doorbells, and MRI machines.

Study Guide

1. What are temporary magnets and how do they differ from permanent magnets?
2. Explain the process by which a temporary magnet is created.
3. Provide examples of temporary magnets in everyday life.
4. Discuss the uses of temporary magnets, particularly in the context of electromagnets.
5. Compare and contrast the properties of temporary magnets and permanent magnets.