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San Diego State University Operations And Supply Chain Management Assignment Help - Field

Question - A wire carrying a current I is bent into the shape of an exponential spiral, r = e?, from ? = 0 to ? = 2p
as suggested in Figure P30.69. To complete a loop, the ends of the spiral are connected by a straight
wire along the x axis. Find the magnitude and direction of B at the origin. Suggestions: Use the Biot–
Savart law. The angle 9 between a radial line and its tangent line at any point on the curve r = f (?) is
related to the function in the following way: Thus in this case r = e ?, tan B = 1 and B = p/4. Therefore,
the angle between ds and r is p - B = 3p/4. Also

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