Question

Find an expression for magnetic force on a current carrying conductor in a uniform magnetic field. when is this force minimum and maximum

Answer 1

When the conductor is perpendicular to the magnetic field, the force will be maximum. When it is parallel to the magnetic field, the force will be zero.

Answer 2

$b = qvb \sin(theta)$
when the magnetic field is parallel to the conductor
force is minimum
when it is perpendicular to conductor
force is maximum