Fleming's left hand rule (for electric motors) shows the direction of the thrust on a conductor carrying a current in a magnetic field.

The left hand is held with the thumb, index finger and middle finger mutually at right angles. It can be recalled by remembering that "motors drive on the left, in Britain anyway."

• The First finger represents the direction of the Field.

• The Second finger represents the direction of the Current [conventional current, positive(+) to negative(-).

• The Thumb represents the direction of the Thrust or resultant Motion.

This can also be remembered using "FBI" and moving from thumb to second finger.

The thumb is the force F

The first finger is the magnetic field B

The second finger is the of current I