Two long, straight wires are parallel and $23$ cm apart.

$($a$)$

If each wire carries a current of $52$ A in the same direction, what is the magnitude of the magnetic force per meter $($in N$/$m$)$ exerted on each wire?

N$/$m

$($b$)$

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

The wires are pulled together.The wires are pushed apart.$$The magnetic force per meter is zero.

$($c$)$

What happens if the currents flow in opposite directions?

The wires are pulled together.The wires are pushed apart.$$The magnetic force per meter is zero.