- A magnetic field is the distribution of a magnetic force in the region of a magnet- In a magnet, the north and south "characteristics" are what creates the magnetic forces
- Law of magnetic forces: dissimilar poles attract while similar poles repel
- To map a magnetic field, you would need to use a test compass
- Field lines can be mapped using a test compass
- Earth acts like a giant magnet, producing its own magnetic field. Suggested theory states that this is because of the flow of hot liquid metals inside the Earth
- Domain theory of magnets: all large magnets are made up of smaller and rotatable magnets called dipoles.
17.2 Electromagnets
-Oersted's Principle: charge moving through a conductor produces a circular magnetic field around the conductor
- Right hand rules are hand signs that are designed to predict how magnetic forces act
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