Download "Электрический ток в газах | Физика 10 класс #61 | Инфоурок"

"videoThumbnail Электрический ток в газах | Физика 10 класс #61 | Инфоурок

0:00

Вступление

0:47

Ионизация

2:46

Рекомбинация заряженных частиц

4:39

Tлекющий разряд

5:50

Дуговой разряд

6:15

Коронный разряд

7:36

Искровой разряд

В Казахстане иностранцам платят больше местных

В Казахстане иностранцам платят больше местных

Channel: Красная Юрта

Различия в молекулярном строении газов, жидкостей и твердых тел | Физика 7 класс #8 | Инфоурок

Различия в молекулярном строении газов, жидкостей и твердых тел | Физика 7 класс #8 | Инфоурок

Channel: ИНФОУРОК

Первый закон термодинамики | Физика 10 класс #41 | Инфоурок

Первый закон термодинамики | Физика 10 класс #41 | Инфоурок

Channel: ИНФОУРОК

Момент силы. Второе условие равновесия твёрдого тела | Физика 10 класс #23 | Инфоурок

Момент силы. Второе условие равновесия твёрдого тела | Физика 10 класс #23 | Инфоурок

Channel: ИНФОУРОК

Магнитный поток | Физика 9 класс #38 | Инфоурок

Магнитный поток | Физика 9 класс #38 | Инфоурок

Channel: ИНФОУРОК

Отражение света. Законы отражения света | Физика 8 класс #27 | Инфоурок

Отражение света. Законы отражения света | Физика 8 класс #27 | Инфоурок

Channel: ИНФОУРОК

Аминокислоты. Названия и свойства аминокислот | Химия 10 класс #44 | Инфоурок

Аминокислоты. Названия и свойства аминокислот | Химия 10 класс #44 | Инфоурок

Channel: ИНФОУРОК

инфоурок

школа

видеоуроки

физика

10 класс

00:00:00

[music]

00:00:10

electric current in gases

00:00:14

gases under normal conditions dielectrics

00:00:18

air is used in technology as an insulator

00:00:21

in power lines between the plates of

00:00:24

air capacitors contacts of

00:00:27

switches

00:00:29

however under certain conditions gases

00:00:31

can be conductors lightning

00:00:34

electric spark arc when welding

00:00:39

they current through gas is called a gas

00:00:42

discharge

00:00:44

free charges ions and electrons

00:00:47

appear in gases only during the process of

00:00:49

ionization; all atoms are neutral;

00:00:53

if the electron leaves its place on

00:00:55

the shell, then it will be a positive

00:00:58

ion; if, on the contrary, an electron is added,

00:01:02

this particle becomes

00:01:04

negatively charged, in other words, a

00:01:06

negative ion,

00:01:09

that is, ionization occurs;

00:01:12

ionization of gases is caused by high

00:01:15

temperature

00:01:16

ultraviolet rays

00:01:19

X-rays, gamma rays and the

00:01:22

like,

00:01:23

ionization occurs under the condition

00:01:26

that the product of the charge of an electron and a small one is the

00:01:29

free path of charged

00:01:32

particles lambda and the length and

00:01:35

large greater than the ionization energy as a result of

00:01:39

heating or exposure to radiation,

00:01:42

part of the atoms is ionized, that is,

00:01:45

disintegrates into positively charged

00:01:47

ions and electrons the main part of the

00:01:50

released electrons remain

00:01:52

free,

00:01:53

the rest join molecules or

00:01:56

atoms forming negative ions,

00:02:00

thus, during the ionization process,

00:02:03

positive negative ions and

00:02:06

electrons appear

00:02:08

if an electric field is created in the gas,

00:02:10

then the positive ions will begin to move to the

00:02:13

cathode and the electrons and negative ions

00:02:17

to the anode

00:02:18

forming an electric current in In electrolyte solutions, the

00:02:21

formation of ions occurs as a

00:02:24

result of the weakening of

00:02:26

intramolecular bonds under the influence of

00:02:28

solvent molecules as a result of the

00:02:31

heating effect of an external

00:02:34

radiation ionizer;

00:02:36

if the ionizer ceases to act,

00:02:38

the gas ceases to be a conductor, since

00:02:42

when positive ions and electrons approach,

00:02:45

they can again form a neutral

00:02:48

atom; this process is called recombination of

00:02:51

charged particles due to

00:02:54

recombination, to maintain a long

00:02:57

current, constant ionization is necessary

00:03:00

if the discharge occurs only under the

00:03:03

action of an ionizer, then the discharge is

00:03:06

not independent;

00:03:08

if the discharge can occur without the action of an

00:03:11

external ionizer by electron impact, then

00:03:14

it is called

00:03:15

independent;

00:03:18

the solution at which an

00:03:20

independent discharge occurs is called the

00:03:22

breakdown voltage; the

00:03:24

ionization potential for studying the

00:03:27

discharge in gas at different pressures,

00:03:30

we use a tube with two electrodes, we

00:03:33

will consider an experiment in obtaining

00:03:35

non-self-sustaining discharges,

00:03:37

let as a result of ionization

00:03:39

several pairs of charged

00:03:42

particles of positive ions and electrons are formed

00:03:46

with a small potential difference between the

00:03:48

electrodes of the tube, positively

00:03:51

charged ions move to the

00:03:53

negative electrode and electrons and

00:03:56

negatively charged ions move to the

00:03:58

positive electrode,

00:04:01

as a result, an electric current arises in the tube,

00:04:03

that is, a

00:04:05

gas discharge occurs; however, if the action of the

00:04:08

ionizer is stopped, the discharge will also stop,

00:04:11

since there are no other sources;

00:04:15

graph a.a.

00:04:17

Some of the charged particles reach the

00:04:19

electrodes, some recombine

00:04:22

a.b. the current almost does not increase saturation current

00:04:27

bc self-discharge

00:04:30

there are several types of

00:04:32

self-discharge

00:04:34

with wide technical application 1

00:04:37

glow discharge

00:04:39

it is a low-

00:04:41

density current arising at low

00:04:44

pressure and the voltage on the electrodes is of the

00:04:46

order of several hundred volts the

00:04:50

glow discharge is accompanied by the glow of a

00:04:52

gas column it is used in luminous

00:04:55

tubes advertising filled with neon

00:04:58

argon and also in fluorescent lamps

00:05:01

to excite the phosphor with which the

00:05:04

inner surface of the tube is coated.

00:05:10

Sogas is a living plasma. The

00:05:13

studying part adjacent to the cathode is

00:05:16

called the dark cathode space. The

00:05:19

luminous column and gas filling the

00:05:22

rest is called the anode

00:05:25

positive column.

00:05:27

At certain pressures, the cold column

00:05:30

breaks up into separate layers

00:05:32

separated by dark intervals of

00:05:38

gas stratification in a glow discharge is

00:05:41

impact ionization

00:05:43

and knocking out electrons from the cathode by

00:05:45

positive ions

00:05:50

oh arc in the

00:05:51

discharge is used in

00:05:53

high-pressure mercury lamps light sources when

00:05:57

welding metals in electric melting

00:05:59

furnaces during the electrolysis of melts in

00:06:02

electric furnaces

00:06:04

meadow discharge burns in mercury lamps of

00:06:06

very bright light sources, an arc discharge occurs between the

00:06:09

electrodes of the welding machine

00:06:16

and a corona discharge is a current

00:06:19

passing through a gas at atmospheric

00:06:21

pressure, arising under the influence of a

00:06:24

non-uniform electric field of

00:06:27

high intensity, a

00:06:30

corona discharge is observed near the

00:06:32

pointed parts of the conductors in the

00:06:35

case when the

00:06:36

electric field strength

00:06:38

near the conductor exceeds 3 at 106

00:06:41

voltmeter the

00:06:42

cause and discharge is the impact

00:06:45

ionization of gas occurring in the area

00:06:48

directly adjacent to the

00:06:52

corona discharge conductor; characteristic

00:06:55

gas glow forms a corona

00:06:57

surrounding the electrode; corona discharge

00:07:00

is used in electrical filters to

00:07:02

purify fuel combustion products from

00:07:05

impurities of solid particles;

00:07:07

used in

00:07:09

Geiger-Müller charged particle counters; lightning rod

00:07:15

there is to deny

00:07:16

the phenomenon characteristic of a corona

00:07:19

discharge causes energy leakage on

00:07:21

high-voltage lines is

00:07:23

especially undesirable and the occurrence of

00:07:25

this discharge on high-voltage

00:07:28

power lines since it leads to

00:07:31

losses of electrical energy

00:07:34

4 spark discharge

00:07:37

we see it in lightning, here the

00:07:40

electric field strength

00:07:42

reaches the breakdown value high

00:07:45

voltage

00:07:46

is used during processing metals,

00:07:49

the most common

00:07:51

state of matter in nature, which is an

00:07:54

ionized gas heated to a very

00:07:57

high temperature containing electrons,

00:08:00

positively charged ions,

00:08:02

neutral atoms, this is plasma, it

00:08:06

consists of the sun, stars, the upper layers of

00:08:09

the atmosphere,

00:08:11

there is low-temperature plasma and

00:08:14

high-temperature plasma,

00:08:15

in addition to household plasma devices on

00:08:18

earth, you can also often see natural

00:08:20

plasma

00:08:21

is lightning, northern lights, St.

00:08:25

Elmo's lights, the earth's ionosphere and of course fire,

00:08:29

plasma is of great importance in

00:08:32

obtaining a thermonuclear reaction

Description:

Видеоуроки являются идеальными помощниками при изучении новых тем, закреплении материала, для обычных и факультативных занятий, для групповой и индивидуальной работы. Они содержат оптимальное количество графической и анимационной информации для сосредоточения внимания и удержания интереса ребят без отвлечения от сути занятия. Каждый видеоурок озвучен профессиональным мужским голосом, четким и приятным для восприятия. Ученики ценят оригинальность подачи материала, родители радуются повышению отметок детей, а учителя в восторге от эффекта и экономии времени и денег при подготовке к урокам. ____________________________________ ★Инфоурок★ Крупнейший в России образовательный онлайн-проект МЫ ПРЕДЛАГАЕМ: ✓ Курсы дополнительного образования детей и взрослых: https://infourok.ru/ ✓ Тесты для учителей и воспитателей: https://infourok.ru/tests ✓ Самые массовые международные дистанционные олимпиады: https://infourok.ru/konkurs ✓ Видеоуроки по 14 предметам: https://school.infourok.ru/videouroki?authChecked=true ✓ Каталог репетиторов: https://school.infourok.ru/?authChecked=true ✓ Библиотека методических материалов для учителей: https://infourok.ru/biblioteka Адрес редакции и издательства: 214011, РФ, г. Смоленск, ул. Верхне-Сенная, 4. [email protected] © 2012–2017 Издатель: Проект «Инфоурок»

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 "Электрический ток в газах | Физика 10 класс #61 | Инфоурок" 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 "Электрический ток в газах | Физика 10 класс #61 | Инфоурок" 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 "Электрический ток в газах | Физика 10 класс #61 | Инфоурок" 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 "Электрический ток в газах | Физика 10 класс #61 | Инфоурок" 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 "Электрический ток в газах | Физика 10 класс #61 | Инфоурок"?

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 "Электрический ток в газах | Физика 10 класс #61 | Инфоурок"?

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.