Under what condition does a current-carrying conductor kept in a magnetic field experience maximum force? On what other factors does the magnitude of this force depend? Name and state the rule used for the determination of the direction of this force.

(N/A) current-carrying conductor experiences maximum force when it is placed perpendicular to the direction of the magnetic field.
The magnitude of this force depends on the following factors:
$(i)$ The strength of the magnetic field $(B)$.
$(ii)$ The magnitude of the current flowing through the conductor $(I)$.
$(iii)$ The length of the conductor $(L)$ placed within the magnetic field.
The rule used to determine the direction of this force is Fleming's Left-Hand Rule.
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.