February 21, 2017

Homework Help: physics

Posted by Anonymous on Friday, February 24, 2012 at 4:20pm.

A horizontal wire of length 0.78 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 20°, it experiences a magnetic force of 8.3 x 10-3 N. Determine the magnitude of the external magnetic field.

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