Скачать или смотреть Electrical contacts | Wikipedia audio article

This is an audio version of the Wikipedia Article:
https://en.wikipedia.org/wiki/Electri...


00:01:06 1 Contact states
00:01:35 2 Contact form
00:02:01 2.1 Form A contacts
00:02:30 2.2 Form B contacts
00:02:53 2.3 Form C contacts
00:03:43 2.4 Form D contacts
00:04:15 2.5 Form K contacts
00:04:42 2.6 Form X contacts
00:05:11 2.7 Form Y contacts
00:05:33 2.8 Form Z contacts
00:06:09 2.9 Make break order
00:06:57 3 Electrical ratings
00:07:21 4 Arc snuffing
00:08:21 5 Materials used
00:08:44 6 Electrical contact theory
00:10:37 7 See also



Listening is a more natural way of learning, when compared to reading. Written language only began at around 3200 BC, but spoken language has existed long ago.

Learning by listening is a great way to:
increases imagination and understanding
improves your listening skills
improves your own spoken accent
learn while on the move
reduce eye strain

Now learn the vast amount of general knowledge available on Wikipedia through audio (audio article). You could even learn subconsciously by playing the audio while you are sleeping! If you are planning to listen a lot, you could try using a bone conduction headphone, or a standard speaker instead of an earphone.

Listen on Google Assistant through Extra Audio:
https://assistant.google.com/services...
Other Wikipedia audio articles at:
https://www.youtube.com/results?searc...
Upload your own Wikipedia articles through:
https://github.com/nodef/wikipedia-tts
Speaking Rate: 0.9724073823470998
Voice name: en-US-Wavenet-A


"I cannot teach anybody anything, I can only make them think."
Socrates


SUMMARY
=======
An electrical contact is an electrical circuit component found in electrical switches, relays, connectors and circuit breakers. Each contact is a piece of electrically conductive material, typically metal. When a pair of contacts touch, they can pass an electrical current with a certain contact resistance, dependent on surface structure, surface chemistry and contact time; when the pair is separated by an insulating gap, then the pair does not pass a current. When the contacts touch, the switch is "closed"; when the contacts are separated, the switch is "open". The gap must be an insulating medium such as air, vacuum, oil, SF6 or other electrically insulating fluid. Contacts may be operated by humans in push-buttons and switches, by mechanical pressure in sensors or machine cams, and electromechanically in relays. The surfaces where contacts touch are usually composed of metals such as silver or gold alloys that have high electrical conductivity, wear resistance, oxidation resistance and other properties.