A toroid having a square cross section, 5.00 cm on a side, and an inner radius of 15.0
Chapter 29, Problem 49(choose chapter or problem)
A toroid having a square cross section, 5.00 cm on a side, and an inner radius of 15.0 cm has 500 turns and carries a current of 0.800 A. (It is made up of a square solenoidinstead of a round one as in Fig. 29-17bent into a doughnut shape.) What is the magnetic field inside the toroid at (a) the inner radius and (b) the outer radius?
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