As we know that, F=2πμ0⋅dI1I2l where, F is force, μ0 is 4π×10−7,I1 and I2 are currents in conductors, l is length of conductor and d is separation between two wires. As same sense of current, attract whereas opposite sense, repel. ∴ Net force, Fnet=(2πμ0d1I1I2−2πμ0d2I1−I2)l=2πμ0⋅(2×10−22×1−12×10−22×1)15×10−2=25×10−7N, towards wire
