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Two identical bar magnets of magnetic mo...

Two identical bar magnets of magnetic moment M each, are placed along X and Y-axes, respectively at a distance d from the origin (as shown in the figure). The origin lies on perpendicular bisector of magnet placed on
X-axis and on the magnetic axis of magnet placed on Y-axis If the magnitude of total magnetic field at the origin is B `= alpha[(mu_(0))/(4pi) (M)/(d^(3))]` then the value of constant `alpha` will be (`d gt gt l.` where lis the lenght of the bar magnets and direction of N to S in magnets is oppsite with respect to each other)

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