Faraday's Law of Induction is a fundamental principle in electromagnetism that describes the relationship between a changing magnetic field and the induced electromotive force (EMF) in a circuit.

When a magnetic field passing through a coil of wire changes, an EMF is induced in the coil. This can occur through various means, such as moving a magnet near the coil or changing the current flowing through a nearby coil.

An example to illustrate Faraday's Law is a simple experiment involving a coil of wire connected to a galvanometer. Move a bar magnet towards the coil, and you will observe a deflection in the galvanometer, indicating an induced EMF. If you reverse the direction of motion of the magnet, the deflection of the galvanometer will also reverse, showing that the induced EMF depends on the rate of change of the magnetic field.

This can be mathematically expressed using Faraday's Law equation: EMF = -dΦ/dt, where EMF is the induced electromotive force, dΦ/dt represents the rate of change of the magnetic field, and the negative sign indicates the direction of the induced current opposes the change that caused it.