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The distance of two points on the axis o...

The distance of two points on the axis of a magnet from its centre is 10 cm and 20 cm respectively. The ratio of magnetic intensity at these points is 12. `5:1`. The length of the magnet will be

A

5 cm

B

25 cm

C

20 cm

D

10 cm

Text Solution

Verified by Experts

The correct Answer is:
D
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