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Write the equation for the force between...

Write the equation for the force between the two parallel straight wires and give the meaning of the symbols used.

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`F=(mu_(0)l_(a)l_(b))/(2pir)L " where " I_(a), I_(b)` are the respective currents in the wires, r is the distance between the two straight parallel conductors and L is the length of the wires.
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