Задача 31128.

Two infinitely long straight conductor with the same currents flowing in the same direction, are at a distance d from each other. In order to push them to a distance 2d, when you move each centimeter length of wire work was completed 138 nJ. To determine the current in the conductors.

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

If you have any questions to address, please. I´ll try to help.