Fleming's Left-Hand Rule [H]

Fleming's left-hand rule is a Higher tier tool that allows you to predict the direction of the force, current or magnetic field in the motor effect. It is essential for AQA GCSE Physics Higher tier questions on specification 4.7.2.

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What Is Fleming's Left-Hand Rule?

Fleming's left-hand rule is a method for finding the direction of the force on a current-carrying conductor in a magnetic field.

Hold your left hand so that the thumb, first finger and second finger are all at right angles to each other (like the three axes x, y, z):

Finger	Represents	Direction
Thumb	Force (or motion/thrust)	The direction the wire moves
First finger	Field	The direction of the magnetic field (N to S)
Second finger	Current	The direction of conventional current (+ to -)

A useful mnemonic: ThuMb = Motion, First finger = Field, SeCond finger = Current.