Question

1) The figure below shows a cross section of a long cylindrical conductor of radius a containing a long cylindrical hole ofradius b. The axes of the cylinder and the hole are parallel and are a distance d apart; a current i is uniformly distributed over the tinted area. (a) Use superposition puoid To show that the magnetic field at the center of the hole is: B (b) Discuss the two special cases b 0 and d 0.

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