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Three identical particles each of mass M...

Three identical particles each of mass `M` are placed at the corners of an equilateral traingle of side `l`. The work done by external force to increase the side of triangle from `l` to `2l` is

A

`(3Gm^(2))/(a)`

B

`(3Gm^(2))/(2a)`

C

`(4Gm)^(2)/(3a)`

D

`(Gm^(2))/(a)`

Text Solution

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The correct Answer is:
B
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