why do two straight parallel metallic wires carrying current in the opposite directions repel each other and in same directions attract each other?

Asked by jaspreet singh | 24th Feb, 2011, 12:34: AM

Expert Answer:

Dear student
When two straight parallel metallic wires carry current in the opposite directions, the magnetic field & thus the magnetic lines of force due to them are in same direction, hence the wires attract each other.
When two straight parallel metallic wires carry current in the same directions, the magnetic field & thus the magnetic lines of force due to them are in opposite direction, hence the wires repel each other.
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Answered by  | 24th Feb, 2011, 10:29: AM

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