As a student technician, you are preparing a lecture demonstration on magnetic suspension. You have a 16-cm long straight rigid wire that will be suspended by flexible conductive lightweight leads above a long straight wire. Currents that are equal but are in opposite directions will be established in the two wires so the 16-cm wire floats a distance h above the long wire with no tension in its suspension leads. If the mass of the 16-cm wire is 14 g and if h (the distance between the central axes of the two wires) is 1.5 mm, what should their common current
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