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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` repectively. The ratio of magnatic intensity at these points is `12.5 : 1`. The length of the megnet will be

A

5cm

B

25cm

C

10cm

D

20cm

Text Solution

Verified by Experts

The correct Answer is:
C
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