Magnets

What makes a magnet? The aligning of the electrons in a material make a magnet. N S

Magnetic Fields http://en.wikipedia.org/wiki/Magnetic_field

Magnetic Fields Closer magnetic field lines indicate a stronger magnets. So where is the strongest part of a magnet?

Changing Magnetic Field Simulation Link

Magnetic Attractions North & south poles attract http://patheticle.com/?tag=magnetic-fields

Opposing Magnetic Fields N-N or S-S field interaction http://panda.unm.edu/Courses/Finley/p405.html

Earth’s Magnetic Field http://www.physics.sjsu.edu/becker/physics51/mag_field.htm

"Just how different a planetary body looks without a global magnetic field is shown by our two nearest neighbours, the Moon and Mars," says David Dunlop, at the University of Toronto, Canada, who wrote a commentary accompanying the research in the journal Nature. "Both had magnetic fields 4 billion years ago, however, their fields died, probably because their cooling planetary cores no longer convected vigorously enough. Without shielding from the solar wind, they lost most of their atmospheres." Nature (DOI: 10.1038/nature05667)

Magnetic Deviation The true north and the magnetic north are not located at the same point on earth. This causes an error in compass readings called magnetic deviation.

Materials Iron, Nickel, Cobalt are the typical hard permanent magnets. All material can be magnetized if the electrons line up. They likely will not remain magnetic.

Electromagnets A current through a material will magnetize the material. Increasing the current will increase the strength of the magnet. Coiling the wire will increase the strength of the magnet. Adding an iron core to the coil of wire will increase the affect of the magnet.

Magnetic Field Effects on Electromagnetic Radiation Light is an electromagnetic wave. Therefore a magnet can affect the transmission of the wave. http://www.astronomynotes.com/light/s2.htm