A length L of straight, horizontal wire is oriented perpendicular to a uniform horizontal magnetic field B.  What current I must flow through the wire for the net force on the wire (magnetic plus gravitational) to be zero?  Assume L = 2.0 m, B = 1.5 T into the page, the mass of the wire is m = 0.50 kg, and .g = 9.8 m/s2.

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A length L of straight, horizontal wire is oriented perpendicular to a uniform horizontal magnetic field B.  What current I must flow through the wire for the net force on the wire (magnetic plus gravitational) to be zero?  Assume L = 2.0 mB = 1.5 T into the page, the mass of the wire is m = 0.50 kg, and .g = 9.8 m/s2.

 

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