Two long, straight wires are parallel and $30$ cm apart.

Hint

If each wire carries a current of $30$ A in the same direction, what is the magnetic force per meter exerted on each wire?

The force per meter is N$/$m$.($Use the $"$E$"$ notation to enter your answer in scientific notation. For example, to enter $3\mathrm{.}1410-12,$ enter $"3\mathrm{.}14$E$-12".)$

Does the force pull the wires together or push them apart?

The force Select an answer$$pulls the wires together$$pushes the wires apart$.$

What is the magnitude and direction of the force per unit length if the currents flow in opposite directions?

The force per meter is N$/$m and the force Select an answer$$pulls the wires together$$pushes the wires apart$.($Use the $"$E$"$ notation to enter your answer in scientific notation. For example, to enter $3\mathrm{.}1410-12,$ enter $"3\mathrm{.}14$E$-12".)$