What is Electromagnetism & Electromagnetic Theory?
Electromagnetism is the fundamental branch of physics that deals with the interactions between electric and magnetic fields. It is the cornerstone of modern electrical and electronic engineering as it explains how electricity, magnetism, and light interact with each other. The Electromagnetic Theory describes the laws governing these interactions and helps us understand how they affect everyday life. In addition, it has been used to design various electrical components such as motors, generators, capacitors, inductors, etc. By understanding these principles, we can control electricity in any way imaginable to produce various useful products.
Fundamental principles of Electronic theory-
Electromagnetic theory is the study of the physical phenomena associated with electric and magnetic fields. Its fundamental principles are based on classical electrodynamics, which describe how electrical and magnetic fields interact with each other and with matter. The two main branches of this theory are magnetostatics and electronics inductance, which deal with how electric currents produce magnetic fields and vice versa. Studying these two branches allows us to understand the behavior of electricity in different environments, from power grids to everyday electronics. Furthermore, we can develop modern technologies such as electric motors and generators by understanding the principles behind electromagnetism.
According to Hung-Yu David Yang, in The Electrical Engineering Handbook, 2005- The Electromagnetic theory based on Maxwell Faraday’s equations provides the basic principle of electrical and electronic circuits over the entire frequency spectrum from dc to optics. It is the basis of Kirchhoff’s current and voltage laws for low-frequency circuits and Snell’s law of reflection in optics. For low-frequency applications, the physics of electricity and magnetism are uncoupled.
Advanced application of electromagnetism in electrical engineering-
Electromagnetism has a vast range of applications in electrical engineering. From electric machine design and transformer design to high voltage engineering, electromagnetism is used to enhance the performance of electrical devices and systems.
In advanced applications, electromagnetism is employed in creating motors, generators, transformers, magnetic levitation systems, and other power delivery systems. In addition to this, it can also be used for signal-processing activities such as communication and navigation. Its many advantages include high efficiency due to low losses when compared with mechanical equipment and its capability of being able to operate at very high temperatures with no adverse effects.
Standard tools and equipment transformer design
A transformer is a widely used device in the electrical and electronics domain. It is an electromagnetic device that follows the basic principle of electromagnetism discovered by Michael Faraday. Transformer design requires special tools and equipment to ensure its proper functioning. Electric meters, oscilloscope calipers, and multimeters are some of the most commonly used tools and equipment for transformer design. They are used to measure electrical parameters such as voltage, current, power, and frequency. These tools help accurately determine the size of a transformer’s windings, the number of turns per winding, and other related parameters.
High voltage engineering application-
High-voltage engineering applications require equipment like voltage dividers that help measure high voltages without risking damage to the measuring device or personnel. Additionally, insulation testers can be used to test the insulation resistance of a transformer’s core-and-coil assembly before finalizing its design. These tools help ensure the transformer is safe for high-voltage applications.
Moreover, High Voltage Application in Industries is used in electric power distribution, in cathode ray tubes, to generate x-rays and particle beams, to produce electrical arcs, for ignition, in Photomultiplier Tubes, and high power amplifier vacuum tubes. Also, other industries, materials, and Scientific applications.