A current-carrying rectangular wire loop with width a = 0.110 m and length b = 0.210 m is in the xy-plane, supported by a nonconducting, frictionless axle of negligible weight. A current of I = 2.75 A travels counterclockwise in the circuit (see the figure below). Calculate the magnitude and direction of the force exerted on the left, right, top, and bottom segments of wire (in N) by a uniform magnetic field of 0.350 T that points in the positive x-direction. Find the magnitude of the net torque (in N · m) on the loop about the axle. (a) left segment of the wire magnitude in N direction?   (b)   right segment of the wire magnitude in N direction?   (c)   top segment of the wire magnitude in N direction?   (d)   Bottom segment of the wire magnitude in N direction?   (e) Find the magnitude of the net torque on the loop about the axle. Answer in N x  m

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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.