Two long straight parallel wires are 15 cm apart. Wire

Chapter 28, Problem 28.55

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Two long straight parallel wires are 15 cm apart. Wire Acarries 2.0-A current. Wire B s current is 4.0 A in thesame direction, (a) Determine the magnetic field due towire A at the position of wire B. (b) Determinethe magnetic field due to wire B at the position ofwire A. (c) Are these two magnetic fields equal andopposite? Why or why not? (d) Determine the force perunit length on wire A due to wire B, and that on wire B dueto wire A. A re these two forces equal and opposite? Why orwhy not?

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