-A magnetic field is the distribution of a magnetic force in the region of a magnet.
-A test compass is used to map a magnetic field.
-A magnet attracts certain materials thats are not magnets. These are called ferromagnetic materials.
-Domain theory states that all large magnets are made up of many smaller and rotatable magnets, called dipoles, which can interact with other dipoles close by. If dipoles line up, then a small magnetic domain is produced.
-Oersted's principle states that charge moving through a conductor produces a circular magnetic field around the conductor.
-Oersted also came up with some basic right hand rules relating electricity and magnetism.
- Right hand rule one states that in order to find out which way the magnetic field is going, grasp the conductor with your right hand with the thumb pointing towards the direction of the conventional flow of the current and the curling fingers will indicate the direction of the magnetic field.
- Right hand rule two states that if the conductor is wrapped in a coils and the thumb of the right hand is pointing towards north, then the curling fingers will indicate the direction of the conventional current flow.
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