Two short bar magnets of length 1 cm each have magnetic moments $1.20\; Am^2$ and $1.00 Am^2$
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 centre is close to (Horizontal component of earth′s magnetic induction is $3.6 \times 10^{−5}
Wb / m^2)$
