Two infinite wires 19 cm apart.
The left-hand wire carries a current of 3 A
out of the paper. The right-hand wire carries
a current of 3 A out of the paper.
The permeability of free space is 4 pi ×10-7 N/A2.
What is the magnitude of the force between
these two wires per unit length? The force between the two wires:. 1. pulls both wires up. 2. pulls both wires down. 3. pulls both wires to the right. 4. pulls both wires to the left. 5. none of directions can be determined. 6. pulls the wires apart. 7. pulls left wire up, pulls right wire down. 8. only one of the force direction can bedetermined.9. pulls the wires together.