Name and state the rule to determine the direction of a force experienced by a current-carrying straight conductor placed in a magnetic field which is perpendicular to it. Name a device that uses a current-carrying conductor and a magnetic field.

(N/A) The rule used to determine the direction of the force is $Fleming's \text{ left-hand rule}$.
Statement: 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.
$A$ device that uses a current-carrying conductor and a magnetic field is an $electric \text{ motor}$.