Have you ever wondered how your smartphone or smartwatch charges wirelessly or how an electric generator produces electricity? The answer lies in a fascinating phenomenon called Electromagnetic Induction.
Discovered by the brilliant scientist Michael Faraday in the 19th century, Electromagnetic Induction is the process of generating an electric current from a changing magnetic field. This discovery was revolutionary, paving the way for the development of countless electrical devices that we rely on today.
Can you think of any other everyday devices that use the principle of electromagnetic induction? Why do you think Faraday’s discovery was considered revolutionary during his time?
In the upcoming sections, we’ll delve deeper into Faraday’s Law, the factors that influence the magnitude of induced emf, and the direction of the induced current.
Most Essential Learning Competencies:
Identify the factors that affect the magnitude of the induced emf and the magnitude and direction of the induced current (STEM_GP12EMIVa-1)
Calculate the induced emf in a closed loop due to a time-varying magnetic flux using Faraday’s Law (STEM_GP12EMIVa-4)