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1. a. What current is required in the windings of a long solenoid that has 1150 turns uniformly distributed over a length of 0.380 m in order to produce a magnetic field of magnitude 1.00 x 10^-4 T at the center of the solenoid?

b.Two parallel wires are 10.0 cm apart, and each carries a current of 50.0 A.

(a) If the currents are in the same direction, find the force per unit length exerted on one of the wires by the other.

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