A square loop of side a is placed at a d...

A square loop of side a is placed at a distance a length away from a long wire carrying a current `I_1` . If the loop carries a current `I_2` as shown in the figure . Then the nature of the nature of the force and its amount is

`(mu_0I_1I_2)/(2pia)` , attractive

`(mu_0I_1I_2)/(4pia)` , attractive

`(mu_0I_1I_2)/(4pia)` , repulsive

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