Question

3. Two magnetic inductions, due to a bar magnet at two
points distant 0.10 m and 0.20 m respectively from the
centre are in the ratio 12.5 to 1. Find the distance
between the poles of the magnet.
(Ans. 40 m]
​

Answer 1

Answer:

https://doubtnut.app/physics-question/the-intensities-of-magnetic-field-at-two-points-on-the-axis-of-a-bar-magnet-at-distances-01m-and-02--17088106

IDK the exact answer. So see the upper video .

I hope it may help you.

Have a good day.