AP EAMCET Engineering 2013 Solved Paper

Two short bar magnets have their magnetic moments 1.2Am2 and 1.0Am2. They are placed on a horizontal table parallel to each other at a distance of 20cm between their centres, such that their north poles pointing towards geographic south. They have common magnetic equatorial line. Horizontal component of earth's field is 3.6×10−5T. Then, the resultant horizontal magnetic induction at mid point of the line joining their centers is (

µ0

4π

=10−7N∕m)