Question

write an experiment to prove that the force due to a magnetic field acting on a current carrying conductor experiences a force perpendicular to its length and the magnetic field.

Answer 1

Objective:

To study the force on a current-carrying straight conductor in a magnetic field and to verify that the motion of the conductor is according to Fleming’s left-hand rule.

Theory:

A current carrying conductor placed in a magnetic field experiences a force. If the direction of the field and that of current are mutually perpendicular to each other, then the force acting on the conductor will be perpendicular to both and that can be determined using the Fleming’s left-hand rule. When current establishes in the conductor, it gets displaced which verifies the existence of a force on the conductor.  
Hold the thumb and the first two fingers of your left hand mutually at right angles to each other as shown in
Then if the Forefinger points in the direction of the Field, and the second finger in the direction of the Current, the thumb will point in the direction of Force.