TS EAMCET 4 May 2018 Shift 2 Solved Paper

Two identical bar magnets of magnetic moment M each, are placed along X and Y axis 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=α[

µ0

4π

M

d3

] the value of constant α willbe:
(d>>l, where l is the length of the bar magnets and direction ofN to S in magnets is opposite with respect to each other )