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In figure, two concentric coils, lying in the same plane, carry currents in opposite directions
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In figure, two concentric coils, lying in the same plane, carry currents in opposite directions. The current in the larger coil 1 is fixed. Figure gives the net magnetic moment of the two coil system as a function of i2. If the current in coil 2 is reversed, what is the magnitude of the net magnetic moment of the two coil system?
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