Question

Two short bar magnets have magnetic moments 1.20 Am² and 1.00 Am²respectively. They are kept on a horizontal table parallel to each other with their north 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 centers is (Horizontal components of Earth’s magnetic induction is 3.6 x 10^-5 Wb m^-2) (NSEP 2000-2001)

Options

• 3.60 x 10^-5 Wb m^-1

• 3.5 x 10^-5 Wb m^-1

• 2.56 x 10^-4 Wb m^-1

• 2.2 x 10^-4 Wb m^-1

Answer 1

2.56 x 10^-4 Wb m^-1