in given figure X and Y are two long str...

in given figure X and Y are two long straight parallel conductor each carrying a current 2 A. the force per unit length on each conductor is F. when the current in each is changed to 1 A and reversed in direction. the force per unit length on each is now

`F/4` and unchanged in direction

`F/2` and reversed in direction

`F/2` and changed in direction

`F/4` and reversed in direction

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