Problem 1: Aloop of wire with radius r =0.035 m is placed in a region of uniform magnetic field with magnitude B. As shown in the figure, the field direction is perpendicular to the plane of the loop. The magnitude of the magnetic field changes at a constant rate from B1 =0.15T to B2 =6.5 T in time At =5.5 s. The resistance of the wire is R =18 N. Part (a) Enter an expression for the magnitude of the magnetic flux through the loop using the symbols in the palette below. Your expression must be valıd at all times described in the problem statement. = At 80 7 8 9 HOME 5 6 В B1 1 2 | 3 B2 +|- END e R Vol BACKSPACE DL CLEAR Submit Hint Feedback I give up! Part (b) Enter an expression for the change in the magnitude of the magnetic flux through the loop using the symbols in the palette below. Part (c) Calculate the numerical value, in tesla squared meters, of the change in the magnitude of the flux. » Part (d) Enter an expression for the magnitude of the induced emf in the loop using the symbols in the palette. Part (e) Calculate, in volts, the numerical value of the magnitude of the emf. Part (f) Enter an expression for the magnitude of the current induced in the loop using the symbols in the palette. Part (g) Calculate the numerical value, in amperes, of the magnitude of the induced current. Rant (l,) Tfrreu are leelking d un at +1he leon from ahore go +het the magnetie fieldis directed terrds rou uhat ie t1 f+he induged

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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.