Question

When 2 metallic wire carry current in opp. direction then why do they repel if they have opposite field lines since unlike charges attract

Answer 1

Answer:

The repulsion and attraction between the conductors depend on the direction of current flowing through it and the resulting magnetic force is created.

The direction of magnetic field on the conductor is determined by Fleming’s right hand rule.

Thus, gives us that the direction of magnetic field turns out to be opposite to each other.

This results in repulsion of the conductors carrying current in opposite directions relatively and vice versa.