Two short bar magnets have magnetic moments 1.20 Am2 and 1.00 Am2, respectively. 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 × 10-5 Wbm-2)
A. 3.60 × 10-5 Wbm-2
B. 3.5 × 10-5 Wbm-2
C. 2.56 × 10-4 Wbm-2
D. 2.2 × 10-4 Wbm-2
Answer:C
Two short bar magnets have magnetic moments 1.20 Am2 and 1.00 Am2, respectively. 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 × 10-5 Wbm-2)
A. 3.60 × 10-5 Wbm-2 B. 3.5 × 10-5 Wbm-2 C. 2.56 × 10-4 Wbm-2 D. 2.2 × 10-4 Wbm-2