Download "Изоляторы и диэлектрики: в чём разница?"

Please wait. We're preparing links for easy ad-free video watching and downloading.

Previous video: Момент силы Next video: Технологии НЛО доступны. "Технологии НЛО" фильм полностью. В. Катющик.

Технологии НЛО доступны. "Технологии НЛО" фильм полностью. В. Катющик.

Технологии НЛО доступны. "Технологии НЛО" фильм полностью. В. Катющик.

Channel: Научный трибунал "Катющик ТВ"

Момент силы

Момент силы

Channel: GetAClass - Физика в опытах и экспериментах

Устройство и принцип работы теплового двигателя Стирлинга Обзор товара. Заказать с Алиэкспресс

Устройство и принцип работы теплового двигателя Стирлинга Обзор товара. Заказать с Алиэкспресс

Channel: obzor69

Inertia ● 1

Inertia ● 1

Channel: GetAClass - Physics in experiments

Электрофор Вольта и коронный разряд

Электрофор Вольта и коронный разряд

Channel: GetAClass - Физика в опытах и экспериментах

Прохождения Венеры по диску Солнца

Прохождения Венеры по диску Солнца

Channel: GetAClass - Физика в опытах и экспериментах

Быстрее ветра и против ветра ● 2

Быстрее ветра и против ветра ● 2

Channel: GetAClass - Физика в опытах и экспериментах

Галилей и его открытия

Галилей и его открытия

Channel: GetAClass - Физика в опытах и экспериментах

Пифагор и его открытия

Пифагор и его открытия

Channel: GetAClass - Физика в опытах и экспериментах

Опыты со шлангом ● 1

Опыты со шлангом ● 1

Channel: GetAClass - Физика в опытах и экспериментах

физика

physics

science

наука

опыты по физике

getaclass

гетакласс

гетакласс физика

школьная физика

физические эксперименты

физика с нуля

физика с нуля видеоуроки

физика просто

физика для начинающих

видеоурок физика

00:00:00

gita eye channel with you Andrey Sitnikov

00:00:04

or the question that is included in the title of

00:00:07

this video arose as a result of

00:00:09

correspondence with one of the subscribers of our

00:00:11

channel, I thought that maybe it

00:00:14

would be interesting and voiced to everyone how

00:00:17

dielectrics differ from insulators and the

00:00:23

answer is that well this essentially the

00:00:28

same substances, but we consider

00:00:32

it from two different points of view, whether

00:00:35

in accordance with their two different functions or

00:00:38

properties. When we talk about insulators,

00:00:41

we are interested in the properties of these substances; they do not

00:00:45

conduct electric current well;

00:00:48

well, an imaginary ideal insulator does

00:00:52

not conduct electric current at all;

00:00:54

its resistivity equal to

00:00:56

infinity, real insulators, of

00:01:01

course, have some kind of large

00:01:04

but nevertheless finite

00:01:06

resistivity and, albeit poorly,

00:01:09

nevertheless conduct electric

00:01:12

current, and here it is necessary to correctly draw

00:01:16

the line between what a good

00:01:20

insulator means and what a not-so-good

00:01:23

insulator or a bad insulator is have become a different

00:01:26

situation, well, take for example

00:01:30

distilled or even

00:01:32

idealized water, of course,

00:01:34

compared to metals it has a very

00:01:37

high resistivity, but

00:01:41

compared to plastics or many

00:01:44

liquids in general, and the

00:01:47

resistivity is quite small and there are

00:01:50

situations when even Diane is zero Bath

00:01:55

water will no longer be a good

00:01:58

insulator because electric current will flow through it,

00:02:02

but especially when we are talking

00:02:04

about large voltages,

00:02:08

well, in the end they will already be noticeable,

00:02:11

or we may be interested in the discharge times

00:02:14

through this material; the relaxation times

00:02:17

will also not be as great as

00:02:20

In the case of plastics, and by the way,

00:02:25

insulators, we are interested in one more

00:02:28

aspect, namely from the side of assembling them and

00:02:31

how they have a breakdown voltage,

00:02:35

what voltage, or what kind of

00:02:39

electric field, generally speaking, it’s better to say

00:02:41

they can withstand without

00:02:44

a hole, again here is how would be

00:02:49

different materials and in some situations

00:02:53

some of them can serve as

00:02:57

insulators in relation to this

00:02:59

voltage and breakdown; others are already

00:03:03

considered as not very suitable;

00:03:06

this is about insulators; now about dielectrics,

00:03:10

that is, about the same substances as a rule,

00:03:14

but considered under a different name point

00:03:17

of view because when we talk about

00:03:20

dielectrics

00:03:21

we are interested in its dielectric

00:03:24

constant,

00:03:25

in fact, what is

00:03:28

a dielectric placed its external

00:03:30

electric field

00:03:32

itself is polarized and due to the internal

00:03:37

polarization, an induced

00:03:38

electric field appears

00:03:41

which weakens the external ones so that the

00:03:43

total electric field inside the

00:03:45

dielectric is compared to this In the same

00:03:47

situation in a vacuum, the electric field with the

00:03:51

same sources means it is

00:03:55

weakened, and again,

00:04:02

such a simple picture in electrostatics seems to do one thing,

00:04:06

and another thing when we are talking about the

00:04:09

behavior of the same substances in

00:04:12

high-frequency fields in the

00:04:18

radio range, and even more so in the color

00:04:23

range, well, it’s as if the picture begins

00:04:27

to expand in comparison with, so to speak, a

00:04:30

simple picture and a school textbook,

00:04:33

and besides, many dielectrics

00:04:37

again have interesting and useful properties,

00:04:41

well, electrets, ferroelectrics,

00:04:46

pen electricians, Pisa electricians,

00:04:49

and these properties are interesting from the point of

00:04:53

view of their possibility applications of

00:04:56

applications, well, it probably

00:05:00

needs to be said separately because

00:05:03

this question constantly arises, as I

00:05:06

see it, regarding the properties of vacuum, can we

00:05:11

say that in vacuum it is a dielectric,

00:05:13

but formally, of course, you can only have

00:05:17

dielectric carts with a dielectric

00:05:18

constant

00:05:19

equal to unity, and we are usually interested in

00:05:23

electrical constants excellent from

00:05:26

one and even noticeably more than

00:05:28

one, but nevertheless, if you want to

00:05:32

say so, then you can say so, well, in

00:05:36

any case,

00:05:37

vacuum should be noted that it is an excellent

00:05:44

insulator, but in the first sense, as if it does

00:05:47

not conduct electric current at all

00:05:51

until if there weren’t some

00:05:55

particles, well, for example, there are

00:05:58

electrons in vacuum tubes which, as it

00:06:02

were, the vacuum ppm is compressed

00:06:04

into it is indexed and

00:06:08

the vacuum has a fairly high

00:06:12

resistance to electrical testing

00:06:15

in the country compared to air, the

00:06:16

spark jumps at lower

00:06:20

electric field strengths,

00:06:22

well so if you want, you can

00:06:24

look at it like that, and when it comes to a

00:06:29

capacitor, you need to directly say that there is,

00:06:32

again, this question is already regularly

00:06:35

asked to me, well, yes, there are such devices,

00:06:37

vacuum capacitors, they are used

00:06:41

in radio stations, but they are quite complex

00:06:44

in terms of devices, in general, some kind of then not in

00:06:46

some sense, not electric vacuum

00:06:49

devices, they are all quite

00:06:50

complicated and quite expensive, so the

00:06:55

capacitances there are not so large, of

00:06:58

course, but such

00:07:03

elements exist, and in this sense,

00:07:08

well, the vacuum in this capacitor is

00:07:13

what is located between its plates,

00:07:17

but although talking specifically

00:07:21

about the dielectric properties of vacuum is a

00:07:24

strange speech, although once upon a time, so to speak,

00:07:28

historically we were talking about the

00:07:31

dielectric constant of vacuum,

00:07:35

what is denoted by epsilon zero is now

00:07:38

simply called the electrical

00:07:41

constant

00:07:43

in the B system, but about that

00:07:46

We’ll probably talk some other time and

00:07:48

separately where this

00:07:50

terminology came from and how it

00:07:54

all worked out historically, but now

00:07:57

thank you for your attention and see you again

Description:

Изоляторы и диэлектрики — обычно это одни и те же материалы, но рассматриваемые с точки зрения разных их свойств. Когда мы говорим об изоляторах, нас интересует способность этих материалов плохо проводить электрический ток. А когда мы говорим о диэлектриках, нас интересует поляризуемость этих же материалов во внешнем электрическом поле. Наш канал с дополнительными материалами https://t.me/getaclass_channel Новосибирский Государственный Университет Физический факультет НГУ https://www.nsu.ru/n/

Preparing download options

Popular

HD video

Only sound

All

* — If the video is playing in a new tab, go to it, then right-click on the video and select "Save video as..."

** — Link intended for online playback in specialized players

Questions about downloading video

How can I download "Изоляторы и диэлектрики: в чём разница?" video?

http://unidownloader.com/ website is the best way to download a video or a separate audio track if you want to do without installing programs and extensions.
The UDL Helper extension is a convenient button that is seamlessly integrated into YouTube, Instagram and OK.ru sites for fast content download.
UDL Client program (for Windows) is the most powerful solution that supports more than 900 websites, social networks and video hosting sites, as well as any video quality that is available in the source.
UDL Lite is a really convenient way to access a website from your mobile device. With its help, you can easily download videos directly to your smartphone.

Which format of "Изоляторы и диэлектрики: в чём разница?" video should I choose?

The best quality formats are FullHD (1080p), 2K (1440p), 4K (2160p) and 8K (4320p). The higher the resolution of your screen, the higher the video quality should be. However, there are other factors to consider: download speed, amount of free space, and device performance during playback.

Why does my computer freeze when loading a "Изоляторы и диэлектрики: в чём разница?" video?

The browser/computer should not freeze completely! If this happens, please report it with a link to the video. Sometimes videos cannot be downloaded directly in a suitable format, so we have added the ability to convert the file to the desired format. In some cases, this process may actively use computer resources.

How can I download "Изоляторы и диэлектрики: в чём разница?" video to my phone?

You can download a video to your smartphone using the website or the PWA application UDL Lite. It is also possible to send a download link via QR code using the UDL Helper extension.

How can I download an audio track (music) to MP3 "Изоляторы и диэлектрики: в чём разница?"?

The most convenient way is to use the UDL Client program, which supports converting video to MP3 format. In some cases, MP3 can also be downloaded through the UDL Helper extension.

How can I save a frame from a video "Изоляторы и диэлектрики: в чём разница?"?

This feature is available in the UDL Helper extension. Make sure that "Show the video snapshot button" is checked in the settings. A camera icon should appear in the lower right corner of the player to the left of the "Settings" icon. When you click on it, the current frame from the video will be saved to your computer in JPEG format.

What's the price of all this stuff?

It costs nothing. Our services are absolutely free for all users. There are no PRO subscriptions, no restrictions on the number or maximum length of downloaded videos.