Question: Consider two long, straight parallel wires each carrying a current I = 4.0 A, with the currents in the same direction.
Part a: Find the magnetic field at one wire produced by the other wire if the wires are separated by a distance r = 2.50 mm.
Part b: What is the magnitude of the magnetic force exerted by one of these wires on a 1.0-m-long section of the other wire?
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