Question

Explain the magnetic field at a point midway between the wires and magnetic force on each wire when the current are in the opposite direction. The wires are placed paralled to each other.

Answer 1

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Answer 2

The effective magnetic field die to current through long wires,

• When the wires are having current in opposite direction.
• The pattern between the magnetic field indicates the force of repulsion between the two parallel  conductors carrying current in opposite direction.
• But when the current carrying long parallel wires are in same direction they have the attraction between them.