What does the thumb represent in Fleming's left hand rule?

In Fleming's left hand rule, the thumb represents the direction of the movement or force experienced by a conductor when it carries an electric current in a magnetic field. This rule is a helpful mnemonic for understanding the relationship between the three key elements: the direction of the magnetic field, the direction of the electric current, and the direction of the force (or motion) on the conductor.

When using the left hand, the thumb points in the direction of the force, which is aligned with the motion or movement of the wire. The index finger points in the direction of the magnetic field, while the middle finger indicates the direction of the electric current. This visual guide assists in predicting how the conductor will behave when subjected to a magnetic field and an electric current, highlighting the fundamental principles of electromagnetism.