Bilayer long solenoid coils wound from wire 0.2 mm radius. In the first layer of the current 3 A, in the second - 1A. Determine the strength of the magnetic field inside the solenoid. Consider two cases: the currents flowing in the same direction and in opposite directions.
Detailed solution shorthand terms, formulas and laws used in the decision, the withdrawal of the calculation formula and the response.
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