# Force between current-carrying wires#

Two long, straight wires are parallel and $${{ params.d }}\rm\ cm$$ apart. One carries a current of $${{ params.I1 }}\rm\ A$$, the other a current of $${{ params.I2 }}\rm\ A$$.

## Part 1#

If the two currents flow in opposite directions, what is the magnitude of the force per unit length of one wire on the other?

## Part 2#

Do the wires attract or repel eachother?