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Two long straight parallel wires separated by a distance of 20 cm carry currents of 30A and 40A in opposite directions. What is the magnitude

Two long straight parallel wires separated by a distance of 20 cm carry currents of 30A and 40A in opposite directions. What is the magnitude of the resulting magnetic field at a point that is 15 cm from the wire carrying the 30-A current and 25 cm from the other wire?

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