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As shown in the figure, a long, hollow, conducting cylinder of inner radius a and outer...

As shown in the figure, a long, hollow, conducting

As shown in the figure, a long, hollow, conducting cylinder of inner radius a and outer radius b carries a current that is flowing out of the page. Suppose that a = 4.49 cm, b = 7.85 cm, and the current i = 127 mA, uniformly distributed over the cylinder wall (between a and b). Find the magnitude of the magnetic field at each of the following distances r from the center of the cylinder:

a) r = 6.49 cm.

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