Force between two parallel current wires | Moving charges & magnetism | Khan Academy

Let's calculate the force between two parallel long wires carrying current. We will find that the force is attractive when the currents are in the same direction, and repulsive when they are in the opposite direction.

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Created by Mahesh Shenoy

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What if there are numbers of insulated wire touching each out one next to another? Can there be an interference that can make RCCB trip??

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the question to ask is if the two opposite forces are equal and opposite to each other why do they attact? why not they neutralize? where is the displacement force coming from ? Is there anything to do with special theory of relativity or attraction forces are fundamentally different from repulsion forces?

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