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Problem: A solenoid 12.0 cm in diameter and 60.0 cm long is made from copper wire of diameter 0.100 cm, with very thin insulation. The wire is wound onto a cardboard tube in a single layer, with adjacent turns touching each other. The power delivered to the solenoid is 200 W.
A- What is the magnetic field at its center?
I need experts help in the above problem.
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