1.Maxwells Equations Awab Sir (www.awabsir.com) 8976104646

2. Every electromagnetic form or radiation - visible light, x-rays, sunlight that heats the earth, radio waves, television waves, wifi signals, bluetooth signals, cell phone transmission, and GPS all consist solely of Electric and Magnetic Fields. And everything you need to know about how they propagate and interact with materials is completely determined by Maxwells Equation. Awab Sir (www.awabsir.com) 8976104646 3. Maxwells Equations Maxwell's Equations are a set of 4 complicated equations that describe the world of electromagnetics. These equations describe how electric and magnetic field propagate, interact, and how they are influenced by objects. Awab Sir (www.awabsir.com) 8976104646 4. Maxwells Equations Awab Sir (www.awabsir.com) 8976104646 5. Gauss Law (Point form) Gauss' Law is the first of Maxwell's Equations which dictates how the Electric Field behaves around electric charges. Gauss' Law can be written in terms of the Electric Flux Density and the Electric Charge Density as: Awab Sir (www.awabsir.com) 8976104646 6. Gauss Law (Integral form) Awab Sir (www.awabsir.com) 8976104646 7. Interpretation of Gauss' Law Gauss' Law states that electric charge acts as sources or sinks for Electric Fields. If you use the water analogy again, positive charge gives rise to flow out of a volume - this means positive electric charge is like a source (a faucet - pumping water into a region). Conversely, negative charge gives rise to flow into a volume - this means negative charge acts like a sink (fields flow into a region and terminate on the charge). Awab Sir (www.awabsir.com) 8976104646 8. Gauss Law for Magnetic Field Gauss' Law for Electric Fields states that the divergence of the Electric Flux Density D is equal to the volume electric charge density. But the second equation, Gauss' Magnetism law states that the divergence of the Magnetic Flux Density (B) is zero. Awab Sir (www.awabsir.com) 8976104646 9. Why? Why isn't the divergence of B equal to the magnetic charge density? Well - it is. But it just so happens that no one has ever found magnetic charge - not in a laboratory or on the street or on the subway. And therefore, until this hypothetical magnetic charge is found, we set the right side of Gauss' Law for Magnetic Fields to zero. Awab Sir (www.awabsir.com) 8976104646 10. Gauss Law for Magnetic Field Awab Sir (www.awabsir.com) 8976104646 11. Interpretation of Gauss Law for Magnetic Field Every magnetic object is a magnetic dipole, with a north and south pole. No matter how many times you break the magnetic in half, it will just form more magnetic dipoles. Gauss' Law for Magnetism states that magnetic monopoles do not exist - or at least we haven't found them yet. Awab Sir (www.awabsir.com) 8976104646 12. Faradays Law We know that an electric current gives rise to a magnetic field - but thanks to Faraday we also know that a magnetic field within a loop gives rise to an electric current. Awab Sir (www.awabsir.com) 8976104646 13. Amperes Law Awab Sir (www.awabsir.com) 8976104646 14. Awab Sir (www.awabsir.com) 8976104646 15. Maxwells Equation in Point form Awab Sir (www.awabsir.com) 8976104646 16. Awab Sir (www.awabsir.com) 8976104646 17. Maxwells Equation in Integral form Awab Sir (www.awabsir.com) 8976104646 18. Awab Sir (www.awabsir.com) 8976104646 19. Time Harmonic form of Maxwells Equation Awab Sir (www.awabsir.com) 8976104646 20. Awab Sir (www.awabsir.com) 8976104646 21. Maxwells Equation with only E and H Awab Sir (www.awabsir.com) 8976104646 22. Refer http://www.maxwells-equations.com/ Awab Sir (www.awabsir.com) 8976104646