Find the force
Consider a circular loop of radius R that is centred at the origin and lies in a plane with a normal in the direction given by polar angles φ0 and θ0. A current I flows in the loop in an anti-clockwise sense with respect to the normal. The loop is subjected to an external field
B = B0 [(1 − βy)xˆ + (1 + βx)yˆ]
Find the total force on the loop.
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