Two short bar magnets of length 1 cm 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 20.0
cm. The value of the resultant horizontal magnetic
induction at the mid-point O of the line joining
their centres is close to