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Posted by on Sunday, February 12, 2012 at 6:24pm.

A horizontal wire of length 0.48 m, carrying a current of 6.8 A, is placed in a uniform external magnetic field. When the wire is horizontal, it experiences no magnetic force. When the wire is tilted upward at an angle of 19° it experiences a magnetic force of 4.00 10-3 N. Determine the magnitude of the external magnetic field.

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