What principle does Faraday's Law illustrate in technology?

Faraday's Law illustrates the principle that a changing magnetic field induces an electromotive force (emf) in a conductor. This principle is foundational to many technologies, particularly those involving electromagnetism, such as electric generators and transformers. When a conductor moves through a magnetic field or when the magnetic field around a stationary conductor changes, the motion or change creates an electric current. This phenomenon is utilized in the generation of electricity in power plants, where turbines rotate in magnetic fields, inducing emf and thus generating electric power.

The understanding of this principle is crucial for advancements in electrical engineering and technology, as it explains how electrical energy can be efficiently produced and transferred, making it a cornerstone of modern electrical systems.