All Questions
Tagged with electrical-engineering materials
44
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Making Silicone Rubber Surface Conductive
Hey Engineering Community, a physicist this side.
I am tinkering on a project where I need a local deformation of the thin sheet(0.2mm thickness, 25cm*20cm dimension); pressing on the surface from one ...
- 101
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What substances have the lowest dielectric strength (volts/meter)?
All the tables of dielectric strength I can find are lists of materials that engineers use as practical insulators, and air is usually the least insulating thing on the list.
Where can I find a more ...
- 101
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Electrical Charges
I have been doing some research on different textile materials and electrical charges. If I wanted to change a negatively charged material to a positive one, would that be possible? Thinking I could ...
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183
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How do I electrically charge a sheet of plastic strongly enough that it firmly sticks to the wall?
electrostatic whiteboards
I have a bunch of these special dry erase sheets. Someone gave them to me as a gift about a year ago; I see they are still available for purchase on the Internet — you can ...
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Electricity generation from sand particles in airstream hitting surface [closed]
I read an experiment which demonstrated that metal filings fired at a surface using air blasts charges the particles, surface and airstream. I understand this is triboelectricity, resulting from ...
- 98
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How could we aproach development of touchscreen with morphing surface or morphing keyboard?
There is this technology of braille e-readers. It is relatively simple and reliable but it never had much commercial success probably because small customer base.
In past a company called Tactus tried ...
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1
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128
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What would be the best capacitor to use for a railgun that uses a capacitor as the projectile?
I have had a long-time interest and fascination with railgun technology and for a long time I have wanted to build a small-scale, simple railgun as a scientific experiment. This railgun is designed to ...
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43
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Is there an electrical analogue to mechanical fatigue with respect to dielectric strength?
Suppose I have an elastomeric specimen from a material sample known to have dielectric strength of, say, 15 kV/mm, as informed by previous dielectric strength testing. If I were to repeatedly subject ...
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replacing the sound a small toy speaker makes
not sure if this counts for this community, and im open to suggestions where this would belong but im looking for advice.
i have no experience in working with physical hardware, as the limited ...
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1
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33
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Is half of depletion region a part of N region or P region?
Is it correct to say that if the P-N junction is in the middle of the depletion region, half of the depletion region is for the P region and the other half is for the N region?
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217
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Magnetising a needle with static electricity using silk cloth
A nautical navigation textbook on my table says that we can magnetise a non-magnetised needle by rubbing it with a silk cloth. I decided to cross check on the internet, and found some experts calling ...
- 98
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222
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Do all thermoelectric generators (TEG) require two distinct metals?
Most thermocouples that I've seen being sold online consist of two separate metal wires connected at junctions. Many smaller thermoelectric generators consist of a combination of iron and copper or ...
- 105
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Is this alternate grounding practice practically implementable?
While grounding power sockets in modular prefabricated steel buildings (see Light Gauge Steel Frame Technology), can we just connect the ground wire to the steel frame of the building itself? as the ...
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Searching for a material that respons to voltage change
For a project, I need a transparent ball that is rigid, but under application of a voltage changes it's size, like a self-inflating balloon. Because it's rigid, however, and thus would break when ...
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Why is it desirable to have high g value for sensing applications, while high d value is desirable for actuation in piezoelectricity?
In piezoelectric materials, two parameters are defined to construct relations between electrical and mechanical energy conversions. These parameters are the charge constant d and the charge constant g....
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