A coil of wire of 10 turns has across sectional area of 0.08 m2. What is the total magnetic flux through the coil if a magnetic field of 0.4T passes through the coil; (i) perpendicular to the plane of the coil.  (ii) at 20o to the plane of the coil  (iii)by what percentage has the answer in (b) differed from the one in (a)?

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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.