The solution of the problem 2.59 cr 2 from the problem

The solution of the problem 2.59 cr 2 from the problem

PROBLEM 2.59
On rectilinear long parallel conductors, located at a distance of 2 cm, in one
1 A current flows. What work per unit length of conductors must be done to
Extend them to a distance of 4 cm?

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