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A circular coil of 200 turns has a radius of 10 cm and carries a current of 2.0 A. (a) Find the
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A circular coil of 200 turns has a radius of 10 cm and carries a current of 2.0 A. (a) Find the magnitude of the magnetic field `(vec B)` at the centre of the coil. (b) At what distance from the centre along the axis of the coil will the field B drop to half its value at the centre?
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