Задача 31280.

As long direct wire and ring currents flow. The ring is perpendicular to the wire and touches it. Find the current in the wire, if the current in the ring is 2 A, and the acute angle between the wire and the line of magnetic induction in the center of the ring is equal to 45 °.

Detailed solution shorthand terms, formulas, laws used in the decision, the withdrawal of the calculation formula and the response.
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