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Task 30924.
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The figure is a sectional area of a long coaxial cable. The radius of its metal strands are R1 = 3 mm, R2 = 4mm, r = 2 mm I1 = 15A, I2 = 5 A. Since the currents flow in opposite directions, to construct a graph of the scale in the magnetic field on the distance from the axis cable. Determine the magnetic energy stored between the metal conductors of the cable per unit length.
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Detailed solution shorthand terms, formulas, laws used in the decision, the withdrawal of the calculation formula and the response.
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