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Results tagged with electromagnetism
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user 205354
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.
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Effect of an external electric field on a electric current
I'm wondering how an external electric field influences an electric current in a conducting wire and how could we measure this effect.
Without an external electric field, the conducting medium resis …
- 229
4
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1
answer
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Symmetry of the dielectric tensor
In the book Principles of Optics by Max Born, in chapter XIV, the rate of change in the electric energy density $w_{e}$ is generalised to
\begin{equation}
\frac{dw_{e}}{dt} = \frac{1}{4\pi}\sum_{kl}\ …
- 229
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Switching the position of voltage probes changes the sign of the measured voltage. How can y...
When you measure the voltage in a battery, for example, you place the voltage probes at the battery ends and get, let's say, a reading of 1.5V. If you change the position of the probes in regards to t …
- 229