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Three identical charges are placed on th...

Three identical charges are placed on three vertices of a square. If the force acting between `q_1` and `q_2` is `F_12` and between `q_1` and `q_3` is `F_13` then `F_13/F_12=`______.

A

`1/2`

B

2

C

`1/sqrt2`

D

`sqrt2`

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