Question

Two thin, long, parallel wires, separated by a distance ‘d’ carry a current of ‘i’ A in the same direction. They will(a) repel each other with a force of $\frac{\mu_{0}i^{2}}{(2\pi d)}$(b) attract each other with a force of $\frac{\mu_{0}i^{2}}{(2\pi d)}$(c) repel each other with a force of $\frac{\mu_{0}i^{2}}{(2\pi d^{2})}$(d) attract each other with a force of $\frac{\mu_{0}i^{2}}{(2\pi d^{2})}$

Answer 1

b) attract each other with the force