Two long conductors, separated by a distance d, carry current $$I1$$ and $$I2$$ in the same direction. They exert a force F on each other. Now, the current in one of them is increased to two times and its directions is reversed. The distance is also increased to $$3d$$. The new value of the force between them is

Question

Infinity Learn · Accepted Answer

F ∝  $$i1$$ $$i2a$$ ; Since one of the current increases two times and distance increases three times, so force become $$23$$ times. Also due to the reversal of direction of current, force becomes repulsive and hence negative.

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