Do two long parallel wires carrying currents in the same direction attract or repel?

State the force per unit length between two long parallel currents \(I_1\) and \(I_2\) separated by distance \(d\).

Do two long parallel wires carrying currents in opposite directions attract or repel?

Two long parallel wires carry \(3.0\,\mathrm A\) and \(5.0\,\mathrm A\), separated by \(0.20\,\mathrm m\). Find \(F/L\).

The force per unit length between two parallel wires is \(2.0\times10^{-5}\,\mathrm{N\,m^{-1}}\). What is the force on a \(0.75\,\mathrm m\) length?

Two wires carry \(4.0\,\mathrm A\) and \(6.0\,\mathrm A\). If \(F/L=2.4\times10^{-5}\,\mathrm{N\,m^{-1}}\), find their separation.

Derive the parallel-wire force per unit length from the straight-wire field and the force on a current-carrying conductor.

Three long parallel wires are equally spaced in a line. All three carry equal currents in the same direction. What is the net force on the middle wire?

Two long wires carry currents in the same direction. Explain why the attraction result is consistent with \(\vec F=I\vec L\times\vec B\).

Historically, the ampere was related to the force between long parallel wires. If \(I_1=I_2=1.0\,\mathrm A\) and \(d=1.0\,\mathrm m\), find \(F/L\).