Electricity & Magnetism
What is Magnetism?
Properties of Magnets:
Magnet: any material that attracts iron and materials that contain iron
Magnets attract iron and materials that contain iron. magnets attract or repel other magnets. In addition, one part of a magnet will always point north when allowed to swing freely.
Magnetic Poles:
Magnetic Pole: any magnet with 2 ends, each is called a magnetic pole.
Magnetic poles that are unlike attract each other and magnetic poles that are alike repel each other.
Magnetic Force: the attraction or repulsion between magnetic poles
Magnetic Fields:
Magnetic Field: the area of magnetic force around a magnet
Magnetic Field Lines: invisible lines that map out the magnetic field around a magnet.
Magnetic field lines spread out from one pole, curve around the magnet, and return to the other pole.
Inside Magnetism
The Atom:
Definitions:
Atom: the smallest particle of an element
Element: basic substances that make up all matter.
Nucleus: center region of the atom
Protons: particle that is positive
Neutron: Particle that has no charge
Electron: particle that is negative
A spinning electron produces a magnetic field that makes the electron behave like a tiny magnet in an atom.
Magnetic Domains:
Magnetic Domain: grouping of atoms that have their magnetic feilds aligned
In a magnetized material, all or most of the magnetic domains are arranged in the same direction.
Ferromagnetic Material: A material that shows strong magnetic properties.
Making and Changing Magnets
Magnets can be made, destroyed or broken apart.
Temporary Magnet: magnet made from a material that easily loses its magnetism
Permanent Magnet: Magnet made from a material that keeps its magnetism for a long time
Magnetic Earth:
Compass: a device that has magnetized needle that spins freely
Earth as a Magnet:
Just like a bar magnet, Earth has a magnetic field surrounding it 2 magnetic poles
Magnetic Declination: the angle (at a particular location) between
Properties of Magnets:
Magnet: any material that attracts iron and materials that contain iron
Magnets attract iron and materials that contain iron. magnets attract or repel other magnets. In addition, one part of a magnet will always point north when allowed to swing freely.
Magnetic Poles:
Magnetic Pole: any magnet with 2 ends, each is called a magnetic pole.
Magnetic poles that are unlike attract each other and magnetic poles that are alike repel each other.
Magnetic Force: the attraction or repulsion between magnetic poles
Magnetic Fields:
Magnetic Field: the area of magnetic force around a magnet
Magnetic Field Lines: invisible lines that map out the magnetic field around a magnet.
Magnetic field lines spread out from one pole, curve around the magnet, and return to the other pole.
Inside Magnetism
The Atom:
Definitions:
Atom: the smallest particle of an element
Element: basic substances that make up all matter.
Nucleus: center region of the atom
Protons: particle that is positive
Neutron: Particle that has no charge
Electron: particle that is negative
A spinning electron produces a magnetic field that makes the electron behave like a tiny magnet in an atom.
Magnetic Domains:
Magnetic Domain: grouping of atoms that have their magnetic feilds aligned
In a magnetized material, all or most of the magnetic domains are arranged in the same direction.
Ferromagnetic Material: A material that shows strong magnetic properties.
Making and Changing Magnets
Magnets can be made, destroyed or broken apart.
Temporary Magnet: magnet made from a material that easily loses its magnetism
Permanent Magnet: Magnet made from a material that keeps its magnetism for a long time
Magnetic Earth:
Compass: a device that has magnetized needle that spins freely
Earth as a Magnet:
Just like a bar magnet, Earth has a magnetic field surrounding it 2 magnetic poles
Magnetic Declination: the angle (at a particular location) between