Magnets Chapter 8

Interactions of Magnets Magnets interact with each other without touching due to the presence of a magnetic force All magnets have a north pole and a south pole –Opposite poles attract each other –Like poles repel each other

Magnetic Field The magnetic field occurs with all magnets The magnetic field occurs with all magnets –Magnetic field is strongest at the poles of the magnet –Magnetic field is what provides the magnetic force that causes magnets to interact The magnetic force decreases with distance The magnetic force decreases with distance

Domains All objects are broken up into domains All objects are broken up into domains Domains are small areas within any objectDomains are small areas within any object Analogy = Counties within a state Analogy = Counties within a state Domains are different sizes in different objectsDomains are different sizes in different objects Objects that are magnetic have large domains Objects that are magnetic have large domains Objects that are not magnetic have small domains Objects that are not magnetic have small domains Each domain iEach domain i

Domains and Magnets  For an object to be Magnetic it must have a large domain and its domains must be aligned Domains become aligned when all the electrons begin moving together Domains become aligned when all the electrons begin moving together