Two parallel wires in free spaces are 10...

Two parallel wires in free spaces are `10cm` apart and each carries a current of `10A` in the same direction. The force one wire exerts on the other per metre of length is

`2xx10^(-4)N` attractive

`2xx10^(-4)N`, repulsive

`2xx10^(-7)N` attractive

`2xx10^(-7)N`, repulsive

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