Your friend Stan is an aspiring magician. He has an idea to perform a levitation trick using magnetic fields, by suspending one wire in the air above two wires forming a base. The geometry is illustrated in the figure, where wires N and P are fixed and each carries a current of 49.0 A . Wire M is free floating, and carries a current in the opposite direction. Suppose that wire M is made of copper (density ρ=8.9 g/cm3) and has a radius of 1.20 mm.
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1) Calculate the current required in wire M to suspend it against gravity.