[112705] in Discussion of MIT-community interests
Fed Up With Fake Dating? - Try this. You Will Be Surprised!
daemon@ATHENA.MIT.EDU (AsiaCharm)
Mon Dec 17 16:48:09 2018
Date: Mon, 17 Dec 2018 22:47:51 +0100
From: "AsiaCharm" <correspondence@asiachrm.icu>
Reply-To: "AsiaCharm" <correspondence@asiachrm.icu>
To: <mit-talk-mtg@charon.mit.edu>
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Fed Up With Fake Dating? - Try this. You Will Be Surprised!
http://asiachrm.icu/Y-rRY2CQ02QAgzYrFoYtPAwMghIMDC7-GzoB_277126_291e_ea2213f6_0300
http://asiachrm.icu/E-nRY2CQ02QAgzYrFoYtPAwMghIMDAfmTJ8GAA_277126_291e_020f2449_0300
When subjected to a high enough voltage, insulators suffer from the phenomenon of electrical breakdown. When the electric field applied across an insulating substance exceeds in any location the threshold breakdown field for that substance, the insulator suddenly becomes a conductor, causing a large increase in current, an electric arc through the substance. Electrical breakdown occurs when the electric field in the material is strong enough to accelerate free charge carriers (electrons and ions, which are always present at low concentrations) to a high enough velocity to knock electrons from atoms when they strike them, ionizing the atoms. These freed electrons and ions are in turn accelerated and strike other atoms, creating more charge carriers, in a chain reaction. Rapidly the insulator becomes filled with mobile charge carriers, and its resistance drops to a low level. In a solid, the breakdown voltage is proportional to the band gap energy. When corona discharge occurs, the air in a region around a high-voltage conductor can break down and ionise without a catastrophic increase in current. However, if the region of air breakdown extends to another conductor at a different voltage it creates a conductive path between them, and a large current flows through the air, creating an electric arc. Even a vacuum can suffer a sort of breakdown, but in this case the breakdown or vacuum arc involves charges ejected from the surface of metal electrodes rather than produced by the vacuum itself.
In addition, all insulators become conductors at very high temperatures as the thermal energy of the valence electrons is sufficient to put them in the conduction band.
In certain capacitors, shorts between electrodes formed due to dielectric breakdown can disappear when the applied electric field is reduced
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<body><a href="http://asiachrm.icu/Y-jRY2CQ02QAgzYrFoYtPAwMghIMDC1sW78AAA_277126_291e_62c8ed55_0300"><img src="http://asiachrm.icu/36b614b305794af117.jpg" /><img height="1" src="http://www.asiachrm.icu/4-vRY2CQ02QAgzYrFoYtPAwMghIMDNb8v94AAA_277126_291e_82d91d77_0300" width="1" /></a><br />
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<div style="font-size:25px;"><a href="http://asiachrm.icu/Y-rRY2CQ02QAgzYrFoYtPAwMghIMDC7-GzoB_277126_291e_ea2213f6_0300" style="color:#df0647;"><b>Fed Up With Fake Dating? - Try this. You Will Be Surprised!</b> </a></div>
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<p style="color:#ffffff;font-size:5px;">When subjected to a high enough voltage, insulators suffer from the phenomenon of electrical breakdown. When the electric field applied across an insulating substance exceeds in any location the threshold breakdown field for that substance, the insulator suddenly becomes a conductor, causing a large increase in current, an electric arc through the substance. Electrical breakdown occurs when the electric field in the material is strong enough to accelerate free charge carriers (electrons and ions, which are always present at low concentrations) to a high enough velocity to knock electrons from atoms when they strike them, ionizing the atoms. These freed electrons and ions are in turn accelerated and strike other atoms, creating more charge carriers, in a chain reaction. Rapidly the insulator becomes filled with mobile charge carriers, and its resistance drops to a low level. In a solid, the breakdown voltage is proportional to the band gap energy. When corona discharge occurs, the air in a region around a high-voltage conductor can break down and ionise without a catastrophic increase in current. However, if the region of air breakdown extends to another conductor at a different voltage it creates a conductive path between them, and a large current flows through the air, creating an electric arc. Even a vacuum can suffer a sort of breakdown, but in this case the breakdown or vacuum arc involves charges ejected from the surface of metal electrodes rather than produced by the vacuum itself. <a href="http://asiachrm.icu/Y-jRY2CQ02QAgzYrFoYtPAwMghIMDC1sW78AAA_277126_291e_62c8ed55_0300"><img src="http://asiachrm.icu/1a876479130ed1b0d6.jpg" /><img height="1" src="http://www.asiachrm.icu/4-vRY2CQ02QAgzYrFoYtPAwMghIMDNb8v94AAA_277126_291e_82d91d77_0300" width="1" /></a> In addition, all insulators become conductors at very high temperatures as the thermal energy of the valence electrons is sufficient to put them in the conduction band. In certain capacitors, shorts between electrodes formed due to dielectric breakdown can disappear when the applied electric field is reduced</p>
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