Nate Electrical Practice Exam 2025 – 400 Free Practice Questions to Pass the Exam

Electromagnetic induction refers specifically to the phenomenon where an electric current is generated in a conductor due to a changing magnetic field. This process was discovered by Michael Faraday and is fundamental to the operation of many electrical devices, including generators and transformers.

When a conductor, such as a wire, is placed within a varying magnetic field or when the strength of the magnetic field around it changes, it induces an electromotive force (EMF) in that conductor. This induced EMF results in the flow of electric current if there is a complete circuit. The principle behind this is described by Faraday's Law of Induction, which states that the induced voltage in a circuit is directly proportional to the rate of change of the magnetic flux through that circuit.

Understanding this process is crucial in electrical engineering and technology, as it enables the transformation of mechanical energy into electrical energy (as seen in generators) and is also a key principle behind inductive components like coils and transformers. The focus on the relationship between changing magnetic fields and induced electric currents defines electromagnetic induction and its applications.