Working from electromagnetism to circuit theory

AI Thread Summary
The discussion centers on the relationship between electromagnetic theory and circuit theory, exploring how circuit theory can be viewed as a specific application of electromagnetic principles. Participants suggest that understanding circuits through the lens of electromagnetic theory can provide deeper insights, particularly by starting with fundamental equations before applying Kirchhoff's laws. Recommended resources include a Berkeley course on electromagnetism and Feynman's lectures, which illustrate the connection between Maxwell's equations and circuit laws like Ohm's and Kirchhoff's. The conversation also highlights that electrical engineers often apply these concepts in fields such as antenna theory and waveguides, reinforcing the relevance of electromagnetic principles in practical circuit analysis.
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Hi,
Are there ways to use/reduce electromagnetic theory to understand circuit theory better? ie use circuit theory as a special case of em theory? if so can you suggest books which do it this way?
basically my idea is to look at any circuit from the general point of view - using the physics of em theory and the equations first ( and then reduce it to Kirchoff and other laws later on and see the correlation).
Thank you.
 
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Things like kirchhoffs rules pretty much apply straight from energy conservation laws.
 
Check out the Berkley course on physics,the volume on electromagnetism,as well as the second volume of Feynman's lectures.I think I've seen Maxwell eqn-s------>Ohm & Kirchhoff's laws deduction.

Daniel.
 
Thank you for the information.
 
If I understand you correctly, you'll find that EEs do this sort of stuff in antenna theory, with wave guides, and so on.
Regards,
Reilly Atkinson
 
It may be shown from the equations of electromagnetism, by James Clerk Maxwell in the 1860’s, that the speed of light in the vacuum of free space is related to electric permittivity (ϵ) and magnetic permeability (μ) by the equation: c=1/√( μ ϵ ) . This value is a constant for the vacuum of free space and is independent of the motion of the observer. It was this fact, in part, that led Albert Einstein to Special Relativity.
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