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In physics, magnetism is one of the phenomena by which materials exert an attractive or repulsive force on other materials. Some well known materials that exhibit easily detectable magnetic properties are iron, some steels, and the mineral lodestone; however, all materials are influenced to greater or lesser degree by the presence of a magnetic field.

Physics of magnetism


Magnetic forces are fundamental forces that arise from the movement of electrical charge. Maxwell's equations and the Biot-Savart law describe the origin and behavior of the fields that govern these forces. Thus, magnetism is seen whenever electrically charged particles are in motion. This can arise either from movement of electrons in an electric current, resulting in "electromagnetism", or from the quantum-mechanical spin and orbital motion of electrons, resulting in what are known as "permanent magnets". Electron spin is the dominant effect within atoms. The so-called 'orbital motion' of electrons around the nucleus is a secondary effect that slightly modifies the magnetic field created by spin.

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freemarkettips (Jenny T) Wed, 04 Nov 2009 09:25:55 -0000
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Magnetic Fields this morning. Sad songs , happy songs. Life's rich tapestry all played out
stevemoore4good (stevemoore4good) Wed, 04 Nov 2009 09:25:45 -0000
Magnetic Fields this morning. Sad songs , happy songs. Life's rich tapestry all played out
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materialsviews (materialsviews) Wed, 04 Nov 2009 09:25:23 -0000
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I Unify in order to Survive, Attracting instinct, I Seal the store of Life force, The Magnetic tone of Purpose, And guided by my own power*2
alberinkcedm (Charlotte Alberink) Wed, 04 Nov 2009 09:20:21 -0000
I Unify in order to Survive, Attracting instinct, I Seal the store of Life force, The Magnetic tone of Purpose, And guided by my own power*2
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