Electromagneticsor electromagnetism is the study involving the interaction of electricparticles such as charges and its electric field with the presence of a magnetand its magnetic field. In the past, electric and magnetic properties of objectswere believed to be independent of each other; however, upon further studies,it was found that these two entities were related to each other.
(Wolfson & Pasachoff, 1990)Oneof the most notable works on this topic was conducted by James Maxwell. Heargued that if charges interact with other charges because of their polarityand the existence of electric field, magnets might also work at the sameprinciple, for magnets have poles also and exhibits magnetic field. In 1991, Giancolliexpounded Maxwell’s finding that the creation of magnetic field is possible byhaving a changing electric field in an empty space. If magnetic field can beproduced in this principle, it must also be possible to create an electricfield by varying the magnetic field.Serway(1992) explained that by accelerating electric charges, electromagnetic wavesare produced. The acceleration of the charges radiates an oscillating electricfield and magnetic field as supported by Hertz’s experiment on induction coilsconnected to two spherical electrodes in 1887.
InMaxwell’s study of the electromagnetism, he formulated the Maxwell’s equation.Before his studies, electromagnetic wave was only considered as electric innature but because of Maxwell’s findings, the understanding of light or theelectromagnetic wave and its application led to the advancement in modernscience and technology.Theapplication of Maxwell’s discovery revolutionized the technology of today. Fromcommunication systems, such as satellites, radio transmission, television, to mobiledevices, computers and to medical equipment such as the magnetic resonance imaging(MRI) and even in transportation such as the magnetic levitating (maglev) trains,all of these were the fruits of the better understanding of electromagnetics.Inthe field of electrical engineering, electromagnetics serves as the backbone behindthe common equipment used in electronic devices and most specially in powergeneration and transmission.
Electric generators, motors, induction motors,transformers follow the principles behind electromagnetism.