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
5 cm
B
25 cm
C
10 cm
D
20 cm
Text Solution
Verified by Experts
The correct Answer is:
C
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