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Results tagged with electromagnetism
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user 36384
The classical theory of electric and magnetic fields, both in the static and dynamic case. It also covers general questions about magnets, electric attraction/repulsion, etc. Distinct from electrical-engineering.
1
vote
Find electric field given the magnetic field
You must known the impedance of the medium. For the vacumm:
$$
\eta_0 = \sqrt{\dfrac{\mu_0}{\varepsilon_0}}
$$
then, the relation between the fields:
$$
\vert\mathbf{H}\vert = \dfrac{\vert\mathbf{E …
- 599
4
votes
Why are there dust particles on TV screens?
When the electric charge on the dust particle is induced, it is attracted to the TV screen. The dust particle is a solid, the electric charge induced the TV screen, can (or not) move the particle (th …
- 599
0
votes
Do electrons flow only on the surface of a wire?
This article explains how electrons flows in a wire. Basically, the penetration depth of the electrons in a conductor depends on the frequency of the varying electric field to which they are subjected …
- 599
1
vote
Transformers and DC voltage
The transformer operation is based on Faraday's Law
$$
\nabla\times\mathbf{E} = -\dfrac{\partial\mathbf{B}}{\partial t}
$$
This law relates the generated electric field (resulting in electromotive f …
- 599
1
vote
Accepted
How you call the constant $\alpha$ within the heat equation in general and in terms of elect...
For an electromagnetic wave, this is the propagation constant. It can be expressed as the sum of two terms: the attenuation constant and the phase constant.
- 599