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A coil consisting of 100 circular loops with radius 0.6m carries a current of 5.0A. Use...

A coil consisting of 100 circular loops with radius 0.6m carries a current of 5.0A. Use B = µ­oIa2/2(x2+a2)2/3

a. What is the magnetic field at a point along the axis of the coil, 0.80m from the center?

b. Along the axis, at what distance from the center is the field magnitude 1/8 as great as it is from the center?

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