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The classical theory of electric and magnetic fields, both in the static and dynamic case. Also covers general questions about magnets, electric attraction/repulsion etc. Distinct from electrical-engineering.

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The equation for energy density is as follows: And A dielectric works by decreasing the Value of the Electric field by a factor of its value, lets call it k. So I assumed that the energy density w …
asked Jun 7 '17 by David Abraham
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So I have been introduced to the four field formalism but have not been explained it in a way that i think is logical or makes sense so i need to ask a few questions on here to allow myself to think c …
asked Apr 22 '18 by David Abraham
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My notes have stated that the relations between direction of electric and magnetic field is as follows: $$ \frac \omega k \vec B_0 = \hat{\vec k} \times \vec E_0$$ where $\hat{\vec k}$ is the unit vec …
asked May 9 '18 by David Abraham
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vote
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If you look at the derivation for the angular frequency it is as follows: When looking at my notes it said that this frequency is also equal to that of the voltage (since the p.d must change directi …
asked May 9 '17 by David Abraham
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2answers
I have a couple of questions regarding the following section in my notes and would like some help in resolving some confusions. 1)why is εr = 1 in the plasma? 2) If µr = 1 it means we switched of …
asked Apr 23 '18 by David Abraham