Nigeria's free digital learning hub. Videos, lecture notes, practice questions and leaderboards aligned with CCMAS, NBTE, NCCE, WAEC, NECO, IJMB and JAMB curricula.
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Nigeria's free digital learning hub. Videos, lecture notes, practice questions and leaderboards aligned with CCMAS, NBTE, NCCE, WAEC, NECO, IJMB and JAMB curricula.
Electromagnetic induction is the process by which a changing magnetic field produces an electric current in a conductor, a principle discovered by Michael Faraday. This phenomenon is the foundation of how generators produce electricity and how transformers work to adjust voltage levels in power systems. A transformer uses two coils of wire, called the primary and secondary windings, wrapped around a magnetic core; when alternating current flows through the primary coil, it creates a varying magnetic field that induces a voltage in the secondary coil. Depending on the ratio of turns in each coil, transformers can either step up or step down voltage, making them essential for efficient power transmission across long distances. Together, electromagnetic induction and transformers explain how electrical energy is generated, transferred, and distributed in modern technology.
This lecture is part of PHY 102 GENERAL PHYSICS 2 in the Physics department. The course has 33 recorded lectures across 11 series, all free to watch. Read or download the PHY 102 lecture note to study alongside the video.
