A toroid having a square cross section, \( 5.00 \mathrm{~cm} \) on a side, and an inner radius o...
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A toroid having a square cross section, \( 5.00 \mathrm{~cm} \) on a side, and an inner radius of \( 19.0 \mathrm{~cm} \) has 460 turns and carries a current of \( 0.400 \mathrm{~A} \). (It is made up of a square solenoid-instead of a round one as in Fig. 29-30-bent 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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