Magnetic Field and range of potential energy

  • #1

Homework Statement


A wire is formed into a circle having a radius of .02m and placed in a uniform magnetic field of 1*10^-4. A current of 5A passes through the wire. What is the range of potential energy the wire possess for different orientations?


Homework Equations


torque=BIA



The Attempt at a Solution



The answer is 2BIA. However, I am not sure how to relate torque to potential energy in this scenario.
 

Answers and Replies

  • #2
ideasrule
Homework Helper
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torque is actually equal to BIAsin(theta), where theta is the angle between the field and the area. Potential energy is just the integral of -Td(theta), so find the function for potential energy and go from there.
 

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