A rectangular loop of wire of size 4 cm × 10 cm carries a steady current of 2A. A straight long wire carrying 5A current is kept near the loop as shown. 
If the loop and the wire are coplanar, find
(i) the torque acting on the loop and
(ii) the magnitude and direction of the force on the loop due to the current carrying wire.
i) Torque on the current carrying conductor is given by, 
In this case, M and B have the same direction. Therefore, = 0o.
So Torque, = 0.
ii) The magnetic forces are equal and opposite on the parallel current carrying wires.
Therefore, force acting on the loop is given by,
The force is attractive in nature or is towards the conductor.
