Figure `29-47` shows wire `1` in cross section, the wire is long and straight, carries a current of `2.50` mA out of the page, and is at distance `d_(1)=4.00` cm from a surface. Wire `2`, which is parallel to wire `1` and also long, is at horizontal distance `d_(2)=5.00` cm wire `1` and carries a current of `6.80` mA into the page. What is the x component of the magnetic force per unit length on wire `2` due to wire `1` ?

Answer

`41.5pN//m`