A) attract each other
B) repel each other
C) do not effect each other
D) get rotated to be perpendicular to each other
Correct Answer: B
Solution :
When two infinitely long parallel conductors carrying current \[{{I}_{1}}\] and \[{{I}_{2}}\] are placed a distance r apart, then force on the unit length of a conductor due to the other conductor is given by \[F=\frac{{{\mu }_{0}}}{4\pi }.\frac{2{{I}_{1}}{{I}_{2}}}{r}\] The force is attractive, if current in two conductors is in same direction; and repulsive, if currents are in opposite directions.
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