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Physics is a manifestation of self-induction. Self-induction, inductiveness. self-induction of the skin guide, according to the electric current, is located near the powerful magnetic field. Electromagnetic induction self-induction lesson in education

Lesson topic : self-induction.

Meta lesson :

chief: Learn about self-induction manifestation, formulate knowledge for this manifestation.

developing: activating the misdirection of schoolchildren, developing the motivation for enhancing physics.

Vikhovna: Vihovuvati is interested in the subject.

Go to lesson:

Lesson type Combinations.

IOrganizational part.

IIStage of setting goals and giving a lesson: on the given level of knowledge, like and who will be able to see the manifestation of self-induction, it is possible to see, for the help of which it will be demonstrated that the phenomenon is, for the sake of it significant, that self-induction is a ceremony In the end of the lesson, a physical value is introduced, which will show the abundance of the EPC self-induction from the form and form of the provider and from the middle, in which the provider is, to be inductive.

IIIstage of actualization pivotal knowledge:

Food for the class:
1. How is the law of magnetic induction to be formulated?
2. Write down the law ate. Magnetic Induction?
3. Does the "-" sign mean?
4. Why should the law of electromagnetic induction be formulated for the EPC, and not for the current7
5. Is the field called "vortex"?
6. So also Foucault's strumi?

IVStage of vivchennya new material:
self-induction

a. Biographical information about medical history

The foundations of electrodynamics boules were laid by Ampere in 1820. Ampere's robots pushed a lot of engineers into the design of new technical annexes, such as an electric motor (designer B.S. Jacobi), a telegraph (S. Morse), an electro-magnet, and the design of what he was doing in the American Gen.

Joseph Henry (Fig. 1) became famous for the founders of a series of unique most needed electromagnets with a power of 30 to 1500 kg with a power of 10 kg of magnet. The development of electromagnetism, in 1832 the development of a new phenomenon in electromagnetism - the phenomenon of self-induction. A lesson has been assigned to the tsyom yavisch.

Small. 1. Joseph Henry

Joseph Henry -1832

b. Demonstration of the lantsyug circuit:

Genri wines walked in flat coils in the dark medium, for the addition of some power effects, which turned more and more yaskravo, not when victorious drowning salty waves. Having learned to respect it, it’s just an hour of moving in the lancet of a tighter strum in a lancet of the lancet of its maximum value, no more.

Small. 2. Scheme of the experimental setup D. Henri

Small. 3. The tension of the light bulbs at the moment the lantsyug is turned on

When the key is pressed, the lamp sleeps practically at once, a friend - by remembering.

The EPC іnductions in the lancers of the lamp are great, and the power of the strum is not immediately attainable to its meaning.

With the release of the key, the strum in the lancet changes in the EPC induction in the lancet, but the induction strum of the straightening is on the same side as the vlast strum of the loop. Tse to produce up to the hopeful decline of the vlasny struma - Another lamp does not go out all at once.

Visnovok: when changing the strum in the provider, the electromagnetics of the induction in the same provider, which is the source of the induction strum, are straightened with such a rank, so that you can overwhelm the provider. In a tsomu polyaga manifestation of self-induction. Self-Induction of Vidadoks of Electromagnetic Inductions. Formulas for the flow of magnetic induction and EPC self-induction.

Main applications: Self-induction is the manifestation of electro-magnetic induction in the provider when changing the force of the strum, which is against the messenger.

Electric power of induction directly proportional to the speed of the struma, which contradicts the messenger taken with the minus sign. Coefficient of proportionality is called inductance, Yaka lay down from the geometrical parameters of the guide:

The provider has an inductive power, equal to 1 HN, when the speed changes to the provider, 1 A per second, the electrical power of self-induction is brought to the general provider, which is 1B.

The manifestation of self-induction of people is common today. Skinny times, turning on any light, we’ll stop it by ourselves, but it’s like a lance, when it’s damaging the induction strumi. Inodi tsi strumi can reach such great values, but in the middle of a vimikach rush through, as we can beat.

Revision of a fragment of the disc "Self-induction in the side and technology "

V Stage of fixing new material.

Food for the class:

1. What is called self-induction?
2. How is it straightened according to the relation to the line of the tension of the vortex electric field in the provider in case of a change or change in the force of the line?
3. What is called inductiveness?
4. What to take for one inductance?
5. For what purpose is the EPC self-induction?

Virіshennya tasks: Maron, st. 23 B1. Rimkevich No. 931, 932, 934, 935, 926.

VI Home zavdannya : P. 15, exercise. Maron, st. 102 (1st U 1-6)

According to Lenz's rule, an inductive strum, like a vine in a closed circuit, is dependent on the opposite of a ringing magnetic flow, like a wicked ring. This year we will look at the vipadoks, if the appearance of the electro-magnetic induction is accompanied by a change from a struma, we will walk through the cat great number turns. As soon as the reason for the fault of the induction struma in the growing struma, then the induction strum with its magnetic field will be against the growth. You can change your mind on the offensive entrance. One parallel two bulbs, to the first bulb, the current is consumed, passing through the rheostat, and to the other bulb, passing through the inductance coil, and the number of turns in the coil is great, but the transformer core is found in the middle. (magnetic field, like a bude vinicati near such a cat, is great). We lock the key with the lancer. The offended light bulbs lit up, the other light bulb lit up with visible reservations. What is the cause of this manifestation? At the moment of locking the key, the force of the struma I is sent, and they force the struma in the skin head I1 and I2 to repair the teeth. And as soon as the conductors of the winners are able to improve the strength of the magnetic field, for example, according to Lenz's rule, in the rheostat and in the case of the winners, the induction streams are detected, as there will be overshoot of the growth of the small ones. Well, the magnetic field, like a winnick near the cat with a strum, is stronger, so the number two light will light up more.
Beastly respect, as in the past, as they looked at earlier, the induction strum in the contour of the vine, as a result of the glorious magnetic field. We have a butt, an induction strum in a lantsyuz, a vine, through a snake, a strum in a lantsyuz. I will call this phenomenon self-induction. The manifestation of self-induction is a phenomenon that is summed up by the promises of an induction strum in a provider, or a cat, as a result of a change in a strum. Viniclius current is called the self-induction strum. The light came on more, passing through the coil, which is more in the induction coil, lower in the rheostat (the coil has a larger number of turns and core). It seems to him that there is less inductive power than a rheostat.
So also inductiveness? Inductance - the price is a physical value; I mean inductance with the letter L (spruce). One of the changes in inductance in the international system is one (CI) - Genri (Gn). The inductiveness of the young cats will be good. Find out the size of the size and shape of the coil, the number of turns, the appearance of the core and the material, the type of preparation. And obviously, because of the greater inductiveness of Volodya's cat, the light bulb will light up with great memories.
We will carry out another dosage, which will demonstrate the manifestation of self-induction during the development of a lanceug. In the scheme, they were picked earlier, carried out by the actions of the change. I will pick up a light bulb, and before the boiler, we will parallelly connect a neon light, yak on the diagram, meaningfully Ln (ate with the index en). When the lance is stuck, it’s just one light bulb. The stress on the dzherely struma is less, it is not necessary for the neon lamp to burn (it is not less than 80 volts to blame). Open the lance, the light bulb goes off, and the neon light goes off with a short-hour sleep.
Why do you think so? With a change in struma in lantsyuz, in the cotushtsi winyk іnduktsіyny strum, with its magnetic field, which has changed struma in lantsyuzi. Moreover, the great induction strum of the floor is great, and it’s just a neon light bulb for the furnace, but it’s just too weak.
Think and give an indication of food, in what way is it a phenomenon of self-induction in lanceus?
A) with a change in the struma in lanceuse,
B) with growing struma in lanceuse,
C) in both cases.
The manifestation of self-induction of wine when it passes through the coil of a changeable struma (it can be done and improved and changed).
When the lantsyug is mixed up, the induction strum
A) pereshkojaє zbіlshennyu struma in lantsyuzі,
B) spriy zbіlshennyu struma in lanceuse,
C) not pouring into the lancet.
When the key is locked, the winyk іnduktsіyny strum pereshkojaє grows struma in lantsyuzі. Self-indulgence of winners among all the guides, when they change the struma in the lancers, however, it will take a lot of money to make a splash on some of the elements in the lancet, only in the wake of the victorious cat to finish the great cat

At the given level of development, as it is, it is possible to see the manifestation of self-induction, it is possible to see, for the help of which it will be demonstrated, it is significant that self-induction is a ceremony In the end of the lesson, a physical value is introduced, which will show the presence of the EPC of self-induction in the form of the provider and in the middle, in which the provider is, i.e., the inductiveness.

Small. 2. Scheme of the experimental setup D. Henri

In fig. 2 shows an electrical diagram of the experimental installation, on the basis of which it is possible to demonstrate the manifestation of self-induction. It is electrically stored with two parallel bulbs connected through a key to a dzherel post-struma. The boiler is connected one after another from one of the lamps. When the lantsyug is flickering, it can be seen that the light bulb, which is last seen from the cat, will light up more, below the other, the light bulb (Fig. 3).

Small. 3. The tension of the light bulbs at the moment the lantsyug is turned on

When the light was turned on, the light was turned on, the light was turned on last, but the light went out.

Why don't the bulbs go out overnight

When the key is pressed (Fig. 4) through the EPC self-induction, the current in the lamp grows more and more, so the lamp will light up more.

Small. 4. Key lock

When the key is released (Fig. 5), the EPC self-induction will change the strum. Tom will continue to flow for a day. A closed loop is required to remove the struma. Such a contour in lantsyuzi є, win revenge offended light bulbs. To that, when the lantern is released, the light bulbs are guilty of the same hour, and there may be some other reasons for this.

Small. 5. Sharing the key

The processes that can be seen in this number when the key is pressed and released are understandable.

1. Locking the key.

Lancyuz has a string-conductive turn. Lead the strum in the whole turn of the flow of the antiquated shooting. The magnetic field will be directed up the hill (Fig. 6).

In such a rank, the coil appears in the vastness of the powerful magnetic field. When the struma grows, the coil will appear in the vastness of the magnetic field of the vlasny struma. If the strum is growing, then the folds of the cym strum the magnetic flow is also growing. Like it seems, when the magnetic flux grows, it penetrates the area of the contour, in the whole contour of the electric shock, the power of the induction, like the inheritance, the induction strum. According to Lenz's rule, the whole strum will be straightened by such a rank, with its own magnetic field crossing the magnetic flux, which permeates the contour area.

Tobto for the one shown in fig. The 6th loop of the induction strum is guilty of the straightening of the winding strum (Fig. 7), by itself the overstretching of the growth of the vlasny strum of the loop. Otzhe, when the key of the strum in the lancet grows, it is not mittvo zvdyak to the one in the lancet of the gallant strum, it is straightened in the protylezhny bik.

2. Sharing the key

With the release of the key, the strum in the lance will change, so that the area of the loop is reduced to a decrease in the magnetic flux. Change the magnetic flux to produce before the appearance of the EPC induction and induction struma. At the same time, the induction strum of straightening is on the same side as the vlast strum of the coil. Tse to produce up to the hopeful decline of the vlasny struma.

visnovok: when changing the strum in the provider, the electro-magnetic induction in the same provider, who is the source of the induction strum, is straightened with such a rank, so that you can overwhelm the provider (Fig. 8). In tsomu polyagaє the essence of self-induction manifestation. Samoinduktsiya is a category of vipadoks of electromagnetical inductions.

Small. 8. The moment of inclusion and switching of the lantsyug

Formula for the knowledge of the magnetic induction of a direct provider with a strum:

de - magnetic induction; - magnetic post; - the strength of the struma; - see the guide to the point.

Potency of magnetic induction through the site of the road:

de - the area of the surface, yak pierced by a magnetic flow.

Such a rank, because of the magnetic induction, is proportional to the size of the strum in the provider.

For a cat, in yak is the number of turns, and is the number of turns, and is the induction of the magnetic field;

Magnetic flow, folds with a coil with the number of turns N, Dorivnyu:

Submitting the formula for the induction of the magnetic field to the tsei viraz, we will recognize:

The setting of the number of turns until the end of the coil is significant by the number:

Otrimumo residual viraz for the magnetic flow:

It can be seen from the figured out how much the flow is to be deposited by the size of the strum and by the geometry of the boiler (radius, dovzhina, number of turns). The value, which is expensive, is called inductive:

One unit of inductiveness Genri:

Otzhe, because of the magnetic іnduksії, viklikaniy strumom in kotushtsі, dorіvnyu:

From the definitions of the formula for the EPC Induction, it is recognized that the EPC Self-Induction provides additional information about the efficiency of the change to the inductance, taken with the sign "-":

self-induction- the whole phenomenon of electromagnetics induction in the provider during the change of the struma, which is the opposite of the messenger.

Electric power of self-induction directly proportional to the speed of the struma, which contradicts the messenger, taken from the sign of the minus. Coefficient of proportionality to be called inductance, Yaka lie in the geometrical parameters of the guide.

The provider has an inductive power, equal to 1 HN, when the speed of the message to the provider is 1 A per second, the electrical power of self-induction, which is 1 V.

List of Literature

Myakishev G.Ya. Physics: Textbook. for 11 cl. zagalnoosvit. install. - M .: Education, 2010 rock.
Kasyanov V.A. Physics. 11 cl.: Textbook. for zalnoosvit. install. - M .: Bustard, 2005.
Gendenshtein L.E., Dik Yu.I., Physics 11. - M.: Mnemosyne.

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Home zavdannya

Nutrition in the paragraph 15 (side 45) - Myakishev G.Ya. Фізика 11 (div. List of recommended literature)
The inductance of a road guide 1 Genri?

Proyav yavischa samoіnduktsії Zamikannya tsepіRazmikanіe lantsyuga When zamikannі in el.tsepі narostaє Strum scho viklikaє in kotushtsі zbіlshennya magnіtnogo flow vinikaє Vihrova el.pole, spryamovane proti Strum, tobto in kotushtsі vinikaє EPC samoіnduktsії scho pereshkodzhaє knots in Strum in lantsyuzі (Vihrova field galmuє electronics). As a result, P1 will light up, lower L2. When rozmikannі el.chain current is ubuv, winyk change of m. Flow in kotushtsі, vinikє vortexes in a field, yak strum is straightened (pragmatically save the amount of force of the strum), so that in kotushtsi vinikє ERS is self-guided structs. As a result, L in case of a successful sleep.

Inductance What is the origin of EPC self-induction? Spruce current svoryuє vlasne magnetic field. Magnetic flow through the contour of the proportional induction of the magnetic field (F ~ B), the induction of the proportional force of the strum in the conductor (B ~ I), and the magnetic flow of the proportional force of the strum (F ~ I). The EPC of self-induction is to lay aside a kind of change in the economy, or in the chain of food, because of the powers of the provider (changes and forms) and because of the general magnetic penetration of the middle, in which there is a provider. It is a physical quantity that shows the presence of EPC self-induction in the form of a provider and in the middle, in which the provider is located, is called a conference of self-induction for inductive.

ENERGY of the magnetic field of the strum Around the guide with the strum, there is a magnetic field, like the energy. Are you getting the stars? Dzherelo struma, inclusions in the food chain, volodya with a reserve of energy. At the moment of the fading of the food chain, dzherelo struma vitrachak a part of his energy for the podolannya of the winery of the EPC self-induction. It’s a part of energy, which is called a powerful energy strum, and it’s going to illuminate the magnetic field. Energy of the magnetic field to the power of the strum. Vlasna energy strum is numerically dignified for robots, because he is guilty of dzherelo strum for additional EPC self-induction, to set the strum in lantsyuz.

The energy of the magnetic field projected by the strum is directly proportional to the square of the strum. Kudi know the energy of the magnetic field to pinch the struma? - see (at the time of the rose, the day of the lantsyug, with the great power of the struma, you can win the iskri or the arc)