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magnetic field
Definition
A magnetic field is a region of space around a magnet where there is a force that can attract or repel other magnets or objects made of magnetic materials.
You can see magnetic fields by sprinkling iron filings around a magnet. The iron filings will line up in the direction of the magnetic field, creating a pattern that looks like a bunch of lines. The lines are called magnetic field lines.
The north pole of a magnet is the end of the magnet that points to the north when the magnet is allowed to swing freely. The south pole of a magnet is the end of the magnet that points to the south when the magnet is allowed to swing freely.
Opposite poles of magnets attract each other, while like poles repel each other. This is why a magnet can attract a paper clip or a piece of iron.
How can the word be used?
The magnetic field of the Earth is what allows compasses to work.
Different forms of the word
Noun: A region of space around a magnet where the magnetic force is exerted.
Adjective: Describing something that is related to a magnetic field. For example, you could say "magnetic field lines" or "magnetic field strength".
Verb: To create a magnetic field. For example, you could say "The magnetized the needle" or "The current created a magnetic field".
Etymology
The word "magnetic field" comes from the noun "magnet", which is a piece of iron or steel that has been magnetised and has the property of attracting other pieces of iron or steel.
The word "magnetic field" was first used in English in the 17th century. It was originally used to describe the area around a magnet where the magnetic force was exerted, but it soon came to be used in a more general sense to describe any region of space where a magnetic force is present.
Question
What is a magnetic field?