A thin bar magnet of length 2 L is bent at the mid point so that the angle between them is 
. The new effective length of the magnet is:
A
B
C
2 L
D
L
Text Solution
Verified by ExpertsThe correct answer is:
D
Let 
be the magnet of length 2L.
is an equalteral triangle.
On bending the magnet, the length of the magnet
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