Typical large values for electric and magnetic fieldsattained in laboratories are about 1.0 x 104 V/m and2.0 T. (a) Determine the energy density for each field andcompare. (b) What magnitude electric field would beneeded to produce the same energy density as the 2.0-Tmagnetic field

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Ferromagnetism

Ferromagnetism is a mechanism by which some materials show magnetic properties. Iron and magnetite, an oxide of iron, are two naturally occurring materials that show the property of ferromagnetism. The word ferromagnetism is derived from the Latin name of iron, "Ferrum" as it was the first observed material to show such property. The property of ferromagnetism is shown by only a few substances such as iron, nickel, cobalt, and their alloys. Some transition metals and alloys of rare-earth metals also show ferromagnetism.