Name and state the law which is used to determine the direction of force on a current carrying conductor placed in a magnetic field.

The direction of force on a current carrying conductor placed in a magnetic field is obtained by the Fleming's left hand rule.

Fleming's left hand rule — Stretch the forefinger, central finger and the thumb of your left hand mutually perpendicular to each other as shown in figure. If the forefinger indicates the direction of magnetic field and the central finger indicates the direction of current, then the thumb will indicate the direction of motion of conductor.