What are the factors on which the force acting on a give current - carrying conductor placed in a magnetic field depend ? State when is the magnitude of force highest .

Explanation

Force on the given conductor ( and hence the displacment of the conductor) depends upon :
(1) direction of current and .
(2) direction of magnetic field .
Experiments have shown that the magnitude of the force is the highest ( or the displacement of the rod is largest) when the direction of current is at right angle to the direction of the magnetic field .