Question: A closely wound, circular coil with radius 2.40 cm has 800 turns. (a) What must the current in the coil be if the magnetic field

A closely wound, circular coil with radius 2.40 cm has 800 turns.
(a) What must the current in the coil be if the magnetic field at the center of the coil is 0.0580 T?
(b) At what distance x from the center of the coil, on the axis of the coil, is the magnetic field half its value at the center?

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