1. The problem statement, all variables and given/known data A bar magnet, with pole strength 0.1 Wb and magnetic length (i.e. distance between the poles) of 5 cm, is placed so that one pole is 2 cm and the other 6 cm from a long, straight wire carrying a current of 6 Amps. The magnet lies in a plane perpendicular to the wire. Find the force on each pole of the magnet (indicating its direction on a diagram). What is the torque on the magnet about the axis of the wire 2. Relevant equations F=qvB F=BIl B=[itex]\mu[/itex]0I/2[itex]\pi[/itex]R [itex]\phi[/itex]=BA 3. The attempt at a solution So I said: F=BIl and B=[itex]\mu[/itex]0I/2[itex]\pi[/itex]R, therefore: F=[itex]\mu[/itex]0I2l/2[itex]\pi[/itex]R In this formula is l the distance between the poles and R the distance the pole is from the wire? Any help would be much appreciated.