Points A and B are situated perpendicular to the axis of a 2cm long bar magnet at large distances X and 3X from its centre on opposite sides. The ratio of the magnetic fields at A and B will be approximately equal to [CPMT 1988]A) 1 : 9 B) 2 : 9 C) 27 : 1 D) 9 : 1

Points A and B are situated perpendicular to the axis of a 2cm long ba

1.	Points A and B are situated perpendicular to the axis of a 2cm long bar magnet at large distances X and 3X from its centre on opposite sides. The ratio of the magnetic fields at A and B will be approximately equal to [CPMT 1988]A) 1 : 9 B) 2 : 9 C) 27 : 1 D) 9 : 1
Answer» B proportional to 1/X CUBE B1/B2 = (3X) cube / (X) cube B1:B2 = 27:1

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Points A and B are situated perpendicular to the axis of a 2cm long bar magnet at large distances X and 3X from its centre on opposite sides. The ratio of the magnetic fields at A and B will be approximately equal to [CPMT 1988]A) 1 : 9 B) 2 : 9 C) 27 : 1 D) 9 : 1

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