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MAGNETISM Section 8.1

MAGNETISM Section 8.1. Magnetism Magnetism- the properties and interactions of magnets Interaction between two magnets, called magnetic force, increases

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Page 1: MAGNETISM Section 8.1. Magnetism  Magnetism- the properties and interactions of magnets  Interaction between two magnets, called magnetic force, increases

MAGNETISMSection 8.1

Page 2: MAGNETISM Section 8.1. Magnetism  Magnetism- the properties and interactions of magnets  Interaction between two magnets, called magnetic force, increases

Magnetism Magnetism- the properties and

interactions of magnets Interaction between two magnets, called

magnetic force, increases as magnets move closer together.

A magnetic field which exerts the magnetic force, surrounds a magnet, and is strongest closest to the magnet.

Page 3: MAGNETISM Section 8.1. Magnetism  Magnetism- the properties and interactions of magnets  Interaction between two magnets, called magnetic force, increases

Magnetic Field

http://hyperphysics.phy-astr.gsu.edu/hbase/magnetic/elemag.html#c1

http://www.school-for-champions.com/science/magnetism.htm

Page 4: MAGNETISM Section 8.1. Magnetism  Magnetism- the properties and interactions of magnets  Interaction between two magnets, called magnetic force, increases

Magnetism Magnetic poles – the regions of a magnet

where the magnetic force exerted by the magnet is strongest

All magnets have a north pole and a south pole. Named for the poles of the earth “north” end of magnet points north “south” end of magnet points south

Page 5: MAGNETISM Section 8.1. Magnetism  Magnetism- the properties and interactions of magnets  Interaction between two magnets, called magnetic force, increases

Magnetism Like poles repel, unlike poles attract. Earth has magnetic poles

A compass needle is a small bar magnet that can freely Rotate

A compass need always points north Magnetic materials- iron, cobalt, and

nickel The magnetic field created by each atom

exerts a force on nearby atoms

Page 6: MAGNETISM Section 8.1. Magnetism  Magnetism- the properties and interactions of magnets  Interaction between two magnets, called magnetic force, increases

Magnetic Domains Magnetic domains- groups of atoms with

aligned magnetic poles In a magnet, the like poles of all the

domains point in the same direction Temporary magnets are made by

placing a magnetic material in a strong magnetic field, forcing a large number of magnetic domains to line up

                                              

                                                                          

                                           

                                                                             

Page 7: MAGNETISM Section 8.1. Magnetism  Magnetism- the properties and interactions of magnets  Interaction between two magnets, called magnetic force, increases

Cutting a bar magnet