All Questions
Tagged with electricity conductors
159
questions
2
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70
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Induced charge on conducting sphere sliced by a plane
We are given a conducting solid sphere, and it is cut by a plane as shown.
A charge $Q$ is given to the smaller part of the conductor, and it is required to find the induced charge on the surface of ...
- 428
1
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1
answer
40
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Confusion about EM waves in a conductor, AC in wires, and skin effect
I am trying to get my head around these different points:
From Maxwell's equations we find that an electromagnetic wave in a conductor decays in amplitude with a characteristic length of about 1 cm in ...
- 197
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34
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Maximum mean distance electrons can travel in ballistic conduction?
How far in mean distance can electrons reasonably travel via ballistic conduction according to the current model and what is the current mean or average distance or length record for ballistic ...
0
votes
3
answers
81
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About lightning and lightning conductor
Lightning not only strikes on a lightning conductor installed on the building... Lightning can strike anywhere on the surface roof of the building even though that building has installed a lightning ...
- 31
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1
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55
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If metals can’t sustain an electric field inside them (as their electrons move to cancel it out), how do they still conduct electricity? [duplicate]
I tried to understand by my own couldn't do so.
- 103
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3
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134
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Would this simple design function as an electromagnet?
I was thinking about electromagnets today and a thought popped up in my mind on what would be a very simple way to create an electromagnet.
Although I have not built and tested it, I am pretty sure ...
- 478
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59
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Is Faraday's cage described in electrostatic 100% insulated?
I apologies if my wording is bad or it is duplicate.
I'm new to Electrostatics. During the topic of conductors & electric
field I was introduced to Electrostatic Equilibrium state in which
the ...
user380217
0
votes
1
answer
179
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Does the physical shape of a current carrying conductor affect the shape of its magnetic field?
I am wondering if the physical shape of a current carrying conductor will have any effect on the shape of its magnetic field or is it that the magnetic field surrounding any current carrying conductor ...
- 478
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Is Net force per unit charge zero in a conductor in the presence of a magnetic field?
Let's assume there is a perfect conductor. This conductor starts moving with a constant velocity in the presence of an external electric field and magnetic field.
Generally an external magnetic field ...
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0
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9
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Effect of pulsed electric field on the temperature of a conductor
I am wondering if my physical intuition regarding the following situation is correct.
Suppose we have an ordinary neutral conductor (say an ordinary piece of metal). We now turn on an electric field. ...
1
vote
1
answer
104
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If a downed powerline contacts the metal chassis of my car, can I touch any metal parts of my car while sitting inside of it?
consider the following situation. I parked my car underneath some high-voltage lines – let’s say 380 kV-lines. Suddenly, one of the lines breaks in the middle due to a storm and one end of the (still ...
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24
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Since propagation of electricity takes time, does magnetic field (that iron filings organize around) build up gradually from one end toward the other?
In very long wires, such as hundreds of kilometers, when we flip a switch and turn on the electricity, does the magnetic field (that iron filings organize around) start to form in one direction and ...
- 171
2
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35
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How does collision affect conductivity in metals? [duplicate]
Say we apply an AC electric field at some angular frequency $\omega$ onto a metal with a scattering time of $\tau$.
How does the relation between $\omega$ and $\tau$ affect the conductivity of the ...
- 624
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27
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Can you measure different currents at different contact points for a volume of material made of two different metals with different conductivities?
My question is about the variation of conductivity in a volume of material and its effect on measured current. A volume is comprised of two metals joined symmetrically in a cuboid shape as in the ...
2
votes
1
answer
557
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Do electrons really move on the conductor?
For my understanding:
Maxwell's equations combined with Poynting's theorem give us a model where electricity is energy carried along with the electromagnetic field (energy is stored in the field, not ...
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