What is the force that a conductor of length `dl` carrying a current I, experience when placed in a magnetic field `vecB`? What is the direction of this force?

What is the force that a conductor dvecl carrying a current I experiences, when placed in a magnetic field vecB , when its length is making an angle of 30^@ with the direction of field?

What is the force on a conductor of length L carrying a current ''I'' placed in a magnetic field of induction B ? When does it become maximum ?