Electromagnetic forces?

Question

What is the direction and magnitude of the force between two parallel wires 45m long and 6.0cm apart, each carrying 35A in the same direction?

Answer 1

F = µ₀I1I2L / 2πr

= ((4π x 10^-7 Tm/A) x 35 A x 35 A x 45 m) / (2π x 0.06 m)

= 0.18 N repulsive