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A solenoid is designed to produce a magnetic field of 2.50 x 10^-2 T at its center. It has a radius of 1.80cm and a length of 43.0 cm, and the wire can carry a maximum current of 15.0 A.

1. What minimum number of turns per unit length must the solenoid have?

2. What total length of wire is reuired?

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