The direction of the force experienced by a conductor when placed in a magnetic field depends upon
the direction of current
the direction of a magnetic field
Fleming's left-hand rule is used to determine the direction of force experienced by a conductor when placed in a magnetic field. According to this 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 middle finger in the direction of the current, then thumb will point in the direction of the force acting on the conductor. Hence, the direction of the force experienced by a conductor when placed in a magnetic field depends upon the direction of current and the direction of the magnetic field.