Two short bar magnets of length 1cm each have magnetic moments 1.20 Am2 and 1.00 Am2, respectively. They are placed on a horizontal table parallel to each other with their N poles pointing towards the south. They have a common magnetic equator and are separated by a distance of 20.0cm. The value of the resultant horizontal magnetic induction at the mid-point O of the line joining their centers is close to (horizontal component of earth’s magnetic induction is )
The situation is as shown in the figure. As the point O lies on broad side position with respect to both the magnets. Therefore,
The net magnetic field at point O is
Substituting the given values, we get