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Question: a circular loop of wire current i radius r lies...

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Circular Loop in Nonuniform Field A circular loop of wire (current I, radius R) les in the xy-plane and is centered at the origin. The magnetic field in the region is nonuniform where B is a constant (a) Consider an infinitesimal piece of the loop located at angle that subtends an angle do. Find an expression for the force dF on that piece. (b) Integrate your expression to find the net force on the loop. (The integral isnt too bad using trig identities, but feel free to use Wolfram or any other resource if you need help with it.)

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