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A little ring of radius 2.0 cm is placed at the center of a bigger ring...

A little ring of radius 2.0 cm is placed at the center of a bigger ring of radius 26 cm . The rings are located with their planes normal to each other. There is a constant current of 5.0 −A in each ring. Calculate approximately the magnitude of the torque the bigger ring exerts on the little ring.       

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