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Parallel wires exert magnetic forces on each other. What about perpendicular wires? Imagine two wires oriented...

Parallel wires exert magnetic forces on each other. What about perpendicular wires? Imagine two wires oriented perpendicular to each other and almost touching. Each wire carries a current. Is there a force between the wires? Explain what happens in this situation.

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Answer #1

Suppose one wire is along the Y axis and the other is along the X axis

The magnetic field acting on the wire segment on the negative x axis is in opposite direction to the magnetic field acting on the wire segment on the positive x axis.

Hence the force on the wire that is on the negative x axis due to the perpendicular wire will cancel out the force on the segment on the wire that is on the positive x axis.

Hence the net force between 2 perpendicular wires will be zero.

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