The points A and B are situated perpendicular to the axis of 2 cm long bar magnet at large distances x and 3 x from the centre on opposite sides. The ratio of magnetic fields at A and B will be approximately equal to
A. 27 : 1
B. 1 : 27
C. 9 : 1
D. 1 : 9
Answer:A
The points A and B are situated perpendicular to the axis of 2 cm long bar magnet at large distances x and 3 x from the centre on opposite sides. The ratio of magnetic fields at A and B will be approximately equal to
A. 27 : 1 B. 1 : 27 C. 9 : 1 D. 1 : 9