The solution of problem 2.71 кр 2 from the problem book

The solution of problem 2.71 кр 2 from the problem book

Task 2.71
What is the volume density of energy of the magnetic field in a solenoid without a core, which has a dense single-layer winding with a wire of 0.2 mm in diameter, if a current of magnitude 0.1 A flows through it?

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