A circular loop of wire of radius .5m is in a iniform magnetic field of .30T. the current in the loop is 2A. what is the magnetic torque when the plane of the loop is parallel to the magnetic field?(adsbygoogle = window.adsbygoogle || []).push({});

Ok i first misread this and assued that it meant parallel or sin(90 degrees) which equals 0.

I have thus far...

A = PI * r^2 = PI * .5^2 = .785 now plug thast into this formula.

t = NIAB = (?)(2)(.785)(.3). I know that to get the number of turns is number of loops divided by length. But there is no such animal, I have a feeling that I am using the wrong formula perhaps or have done something incorrect. Ive tripled check and still get .471 as my answer. What am I doing wrong?

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# Magnetism: torque

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