(a) Find the flux through the loop, directed into the page, at both the time instant shown and two seconds later. (b) Find the magnitude and direction of the induced current in the loop during those two seconds. (c) Find the net magnetic force felt by the loop during those two seconds.

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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.