Why does a current-carrying conductor experience a force when it is placed in a magnetic field? State Fleming's left-hand rule.

(N/A) current-carrying conductor experiences a force when placed in a magnetic field due to the interaction between the magnetic field produced by the current flowing through the conductor and the external magnetic field in which it is placed.
Statement of Fleming's left-hand rule:
Stretch the thumb,forefinger,and middle finger of your left hand such that they are mutually perpendicular to each other. If the forefinger points in the direction of the magnetic field and the middle finger points in the direction of the current,then the thumb will point in the direction of the force acting on the conductor. An example of a device based on this principle is the electric motor.