Homework Help: Physics

Posted by Stefan on Thursday, March 10, 2011 at 6:43pm.

An eight turn coil encloses an elliptical area having a major axis of 40.0 cm and a minor axis of 30.0 cm. The coil lies in the plane of the screen and has a 6.10 A current flowing clockwise around it. If the coil is in a uniform magnetic field of 2.07 10-4 T directed toward the left of the screen, what is the magnitude of the torque on the coil? (Hint: The area of an ellipse is A = πab, where a and b are, respectively, the semimajor and semiminor axes of the ellipse.)

Physics - drwls, Thursday, March 10, 2011 at 7:24pm
See http://hyperphysics.phy-astr.gsu.edu/hbase/magnetic/magmom.html

Torque = 6*Area*B*sin 90 = 6 pi*a*b*B

The coil area gets multiplied by 6 because of the number of loops

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