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A closely wound coil has: radius of 5cm, 200 turns, and Resistance of 10 ohms. There...

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Physics

A closely wound coil has: radius of 5cm, 200 turns, andResistance of 10 ohms. There is a 10.0mA of constant current in thesearch coil. The magnetic field through the coil is 0 at t=0,perpendicular to the area of the coil. The coil is completelyinside a uniform magnetic field.

(a) Find the magnitude of the magnetic field at t=20.0ms.

(b)The magnetic field from part (a) is produced by a larger coilwhich is outside of the first coil. The outer coil has: 800turns,r=30cm.

Find the current through the outer coil at t=20.0ms.

(c)The inner coil rotates, forming an angle of 60 degree withthe outer coil.

Find the current through the inner coil.

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