Two parallel wires 1 m apart carry currents of 1 A and 3 A respectively in opposite directions. The force per unit length acting between these two wires is

Question

$6 \times 10^{-7} \, \text{Nm}^{-1}$ repulsive

$6 \times 10^{-7} \, \text{Nm}^{-1}$ attractive

$6 \times 10^{-5} \, \text{Nm}^{-1}$ repulsive

$6 \times 10^{-5} \, \text{Nm}^{-1}$ attractive

Solution

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