Magnetic Field Definition
A magnetic field exerts a force on magnets or on certain metals. For example, it enables a magnet to attract iron from a distance.
View Lesson on Electric & Magnetic Fields
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Electric & Magnetic Fields
Fun Facts
- Iron filings align to show magnetic field lines around a magnet.
- Larger magnets have stronger magnetic fields than smaller ones, and magnetic fields get stronger as you get closer to the magnet.
- A magnetic field allows magnets to attract or repel certain metals without contact.
Why Do We Need To Know About Magnetic Field
Learning about magnetic fields helps us understand how things like speakers work, which we use every day. Any device with a speaker, such as a phone or earbuds, relies on magnetic fields to produce sound. This is useful for jobs in electronics, engineering, and making things. Knowing about magnetic fields can help create new stuff like special guns and simple engines, showing why it’s important to know how magnetic fields work with electricity.
Frequently Asked Questions
Check out the Full Lesson on Electric & Magnetic Fields
In this lesson, we learn that:
- Forces acting at a distance can be explained by electric & magnetic fields.
- Forces from electric and magnetic fields can be either attractive or repulsive.
- The strength of the force depends on factors like distance or the amount of charge.
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