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# A current carrying wire $PQ$ is placed $\perp$ to another wire $RS$ carrying a constant current. If the second wire is free to move, it will have

$\begin {array} {1 1} (a)\;Translational\: motion\: only & \quad (b)\;Rotational\: motion \: only \\ (c)\;No\: motion\: at\: all & \quad (d)\;Both\: translational\: and\: rotational \: motion \end {array}$

The field due to $RS$ is different at $P$ and $Q$ hence there is both a force and a torque.
$\therefore PQ$ will have both the type of motions
Ans : (d)