The diagram at right shows two wires, A and B, which are oriented perpendicular to the plane of the paper. Note that the current is flowing in opposite directions. Sketch the direction of the magnetic field produced by wire B in the neighborhood of wire A.
If the wires are 50.0 cm long and are separated by 2.0 cm. The current in each wire is 8.0 A. Determine the magnitude of the magnetic field produced by wire B. (μ0=1.26x10-6)

Will the wires experience an attractive or repulsive force? Explain.

The wires are 50.0 cm long and are separated by 2.0 cm. The current in each wire is 8.0 A. Determine the value of the force that wire A experiences from B. (μ0=1.26x10-6)

By what factor will the force on wire A change if
the current in wire B is doubled?

the distance between the wires is doubled?