Question

 A square loop of side 20 cm carrying current of 1 A is kept near an infinite long straight wire carrying a current of 2 A in the same plane as shown in the figure.

Calculate the magnitude and direction of the net force exerted on the loop due to the current carrying conductor.

Comments

Why net force on ad and bc is 0??

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Because AD and BC will exert same forces on opposite directions as they are at exactly the same distance from the wire.

Answer 1

This net force is directed towards the infinitely long straight wire.

Net force on sides bc and da = zero

.'.  Net force on the loop = 5.33 x 10^-7 N

The force is directed towards the infinitely long straight wire.