Thirty-seven turns of insulated wire 0.100 cm in diameter aretightly wound to form a flat spiral. The spiral fills a disksurrounding a circle of radius 5.00 cm and extending to a radius8.70 cm at the outer edge. Assume the wire carries a current I atthe center of its cross section. Approximate each turn of wire as acircle. Then a loop of current exists at radius 5.05 cm, another at5.15 cm, and so on. Numerically calculate the magnetic field at thecenter of the coil. (Assume B is in teslas and I is in amperes.) B= I
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