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The figure below shows a cross section of a long cylindrical conductor of radius a =...

The figure below shows a cross section of a long cylindrical conductor of radius a = 4.14 cm containing a long cylindrical hole of radius b = 1.56 cm. The central axes of the cylinder and hole are parallel and are distance d = 2.03 cm apart; current i = 5.49 A is uniformly distributed over the tinted area. (a) What is the magnitude of the magnetic field at the center of the hole? (b) What is the magnitude if b = 0? (c) What is the magnitude if d = 0?

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