And from personal experience, it is hard to get two engineers to agree on what it actually is. Now might be a good time to talk briefly about the term “field.” It is a strange concept.
Maxel engineers how to#
Ta-da! We now know how to draw the connection between the amount of electric charge and the amount of force produced. We can then use equation 1 in combination with another simple equation that describes how to translate electric or magnetic field into force. What we mean is that if there was another electron nearby, it would be pushed. Imagine an electron, and the next thing you see is this electron radiating electric force pulling inwardly and uniformly in all directions. But let’s skip this densely mathematical section and jump to what the equations really mean.Įquation 1 states that electric field ( E or D) goes outward/inward ( ∇.) from an electric charge ( ρ). Professors usually take a few lectures to explain what a field line is and what a differential operator is. The four equations shown in Figure 1 carry an abstract but complete understanding of everything we know about electromagnetism. On the other hand, we, engineers, we like to understand concepts and feed formulas to computer simulators. Physicists are fond of abstracting concepts into mathematical expressions and operators. Maxwell equations: Four lines that provide a complete description of light, electricity and magnetism. Very few engineering lecturers, on the other hand, focus on the underlying physics of such equations or the relevance of such hypothetical problems or developing intuition. They keep the students too busy memorizing formulas and solving hypothetical charge problems. Lecturers are more often than not flooding the minds of students with a tremendous number of equations and mathematical problems. The conflict starts simply with the way electromagnetism is taught in engineering schools. The equations seem to bring up some frustrating memories to everyone. Feynman, recipient of the Nobel Prize in Physics in 1965Įlectrical engineers tend to dislike hearing about Maxwell’s equations. The American Civil War will pale into provincial insignificance in comparison with this important scientific event of the same decade.” “From a long view of the history of mankind, seen from, say, ten thousand years from now, there can be little doubt that the most significant event of the 19th century will be judged as Maxwell’s discovery of the laws of electrodynamics. By Asem Elshimi, Design Engineer, Silicon Labs
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