Task id13505
Seller: nerdmavr
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Product description
Two parallel sufficiently long wires are located at a distance of 20 cm from each other. They support antiparallel currents of 20 A each. How much work per unit length of wires is done by the magnetic field when the wires are removed at a distance of 40 cm? How will the magnetic energy change per unit line length?
Additional information
Answer. Format gif