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Three equal charges q1,q2,q3 are placed ...

Three equal charges `q_1,q_2,q_3` are placed at the three corners ABC of a square ABCD. If the force between the charges at A and B (on `q_1 and q_2`) is `F_12` and that between A and C is `F_13` then the ratio of magnitudes `F_12 and F_13` is

A

`1//2`

B

`2`

C

`1/(1//sqrt(2))`

D

`sqrt(2)`

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The correct Answer is:
B
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