Question: A flat, round iron ring 5.00 cm in diameter has a cur-rent running through it that produces a magnetic field of 75.4 T at its

A flat, round iron ring 5.00 cm in diameter has a cur-rent running through it that produces a magnetic field of 75.4 μT at its center. This ring is placed in a uniform external magnetic field of 0.375 T. What is the maximum torque the external field can exert on the ring? Show how the ring should be oriented relative to the field for the torque to have its maximum value.

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