JEE Main 2013 Physics question
Not in JEE Advanced syllabus
Two short bar magnets of length 1 cm each have magnetic moments 1.20 A and 1.00 A 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 ( Horizontal component of earth's magnetic induction is )
Answer: (4)
Solution
O is on the equatorial line of each magnet at 0.1 m: gives and T. On the equator the field is opposite
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