A long (practically infinite) straight wire of radius a carries an A.G. current,

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A long (practically infinite) straight wire of radius a carries an A.G. current, I. You can assume that the current is all contained within one skin depth from the outer surface of the wire. You can further assume that the current is uniformly distributed within that skin depth. a) Sketch a plot of the magnitude of the magnetic field ri as a function of distance r from the wire axis from zero to a distance several times the radius of the wire for the case where the skin depth less than the radius of the wire. b) re -draw the plot for the case of a 10 times higher frequency c) re -draw the plot for the case where the current is D.C. rather than A.C. d) What is the maximum value of for each of the cases above? (10 points)

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