A magnetic field this is the matter that arises around sources of electric current, as well as around permanent magnets. In space, the magnetic field is displayed as a combination of forces that can influence magnetized bodies. This action is explained by the presence of driving discharges at the molecular level.
A magnetic field is formed only around electric charges that are in motion. That is why magnetic and electric field are, integral and together form electromagnetic field. The components of the magnetic field are interconnected and influence each other, changing their properties.
Properties of magnetic field:
1. A magnetic field arises under the influence of driving charges of electric current.
2. At any point, the magnetic field is characterized by the vector physical quantity entitled magnetic induction, which is the strength characteristic of the magnetic field.
3. A magnetic field can only affect magnets, current-carrying conductors and moving charges.
4. The magnetic field can be constant or alternating type
5. The magnetic field is measured only special devices and cannot be perceived by human senses.
6. The magnetic field is electrodynamic, since it is generated only by the movement of charged particles and affects only charges that are in motion.
7. Charged particles move along a perpendicular trajectory.
The size of the magnetic field depends on the rate of change of the magnetic field. According to this feature, there are two types of magnetic fields: dynamic magnetic field And gravitational magnetic field. Gravitational magnetic field occurs only near elementary particles and is formed depending on the structural features of these particles.
Magnetic moment occurs when a magnetic field acts on a conductive frame. In other words, the magnetic moment is a vector that is located on the line that runs perpendicular to the frame.
The magnetic field can be represented graphically using magnetic lines of force. These lines are drawn in such a direction that the direction of the field forces coincides with the direction of the field line itself. Magnetic lines of force are continuous and closed at the same time.
The direction of the magnetic field is determined using a magnetic needle. The lines of force also determine the polarity of the magnet, the end with the output of the force lines is the north pole, and the end with the input of these lines is the south pole.
It is very convenient to visually evaluate the magnetic field using ordinary iron filings and a piece of paper.
If we put a sheet of paper on a permanent magnet and sprinkle sawdust on top, then the iron particles will line up accordingly power lines magnetic field.
The direction of the power lines for a conductor is conveniently determined by the famous gimlet rule or rule right hand
. If we wrap our hand around the conductor so that thumb looked in the direction of the current (from minus to plus), then the 4 remaining fingers will show us the direction of the magnetic field lines. 
And the direction of the Lorentz force is the force with which the magnetic field acts on a charged particle or conductor with current, according to left hand rule.
If we place left hand in a magnetic field so that 4 fingers look in the direction of the current in the conductor, and the lines of force enter the palm, then the thumb will indicate the direction of the Lorentz force, the force acting on a conductor placed in a magnetic field. 
That's all. Be sure to ask any questions you have in the comments.
There are a lot of topics on the Internet dedicated to the study of the magnetic field. It should be noted that many of them differ from the average description that exists in school textbooks. My task is to collect and systematize all freely available material on the magnetic field in order to focus a New Understanding of the magnetic field. The magnetic field and its properties can be studied using a variety of techniques. With the help of iron filings, for example, Comrade Fatyanov conducted a competent analysis at http://fatyf.narod.ru/Addition-list.htm
Using a kinescope. I don't know this man's last name, but I know his nickname. He calls himself "Veterok". When a magnet is brought close to the kinescope, a “honeycomb pattern” is formed on the screen. You might think that the “grid” is a continuation of the kinescope grid. This is a magnetic field imaging technique.
I began to study the magnetic field using ferromagnetic fluid. It is the magnetic fluid that maximally visualizes all the subtleties of the magnetic field of the magnet.
From the article “what is a magnet” we found out that a magnet is fractalized, i.e. a reduced-scale copy of our planet, the magnetic geometry of which is as identical as possible to a simple magnet. Planet earth, in turn, is a copy of that from the depths of which it was formed - the sun. We found out that a magnet is a kind of induction lens that focuses on its volume all the properties of the global magnet of planet earth. There is a need to introduce new terms with which we will describe the properties of the magnetic field.
An inductive flow is a flow that originates at the poles of the planet and passes through us in the geometry of a funnel. The north pole of the planet is the entrance to the funnel, the south pole of the planet is the exit of the funnel. Some scientists call this flow the ethereal wind, saying that it "has galactic origin." But this is not an “ethereal wind” and no matter what ether, it is an “induction river” that flows from pole to pole. The electricity in lightning is of the same nature as the electricity produced by the interaction of a coil and a magnet.
The best way to understand that there is a magnetic field is to see him. It is possible to think and make countless theories, but from the standpoint of understanding the physical essence of the phenomenon, it is useless. I think that everyone will agree with me if I repeat the words, I don’t remember who, but the essence is this: best criterion this is an experience. Experience and more experience.
I did it at home simple experiments, but they allowed me to understand a lot. A simple cylindrical magnet... And I twisted it this way and that. I poured magnetic fluid on it. There is an infection, it doesn’t move. Then I remembered that I read on some forum that two magnets compressed by like poles in a sealed area increase the temperature of the area, and vice versa lower it with opposite poles. If temperature is a consequence of the interaction of fields, then why shouldn’t it also be the cause? I heated a magnet using " short circuit"from 12 W and a resistor, simply by leaning the heated resistor against the magnet. The magnet heated up and the magnetic fluid first began to twitch, and then became completely mobile. The magnetic field is excited by temperature. But how can this be, I asked myself, because in the primers they write about , that temperature weakens the magnetic properties of a magnet. And this is true, but this “weakening” of the kagba is compensated by the excitation of the magnetic field of this magnet. In other words, the magnetic force does not disappear, but is transformed due to the excitation of this field. Excellent Everything rotates and everything spins. But why is it rotating does the magnetic field have exactly this rotation geometry, and not some other? At first glance, the movement is chaotic, but if you look through a microscope, you can see that in this movement there is a system. The system does not belong to the magnet in any way, but only localizes it. In other words, a magnet can be considered as an energy lens that focuses disturbances within its volume.
The magnetic field is excited not only by an increase in temperature, but also by a decrease in temperature. I think that it would be more correct to say that the magnetic field is excited by a temperature gradient rather than by any specific temperature sign. The fact of the matter is that there is no visible “restructuring” of the structure of the magnetic field. There is a visualization of the disturbance that passes through the region of this magnetic field. Imagine a disturbance that moves in a spiral from the north pole to the south through the entire volume of the planet. So the magnetic field of a magnet = local part of this global flow. Do you understand? However, I am not sure which thread exactly... But the fact is that it is a thread. Moreover, there are not one, but two threads. The first is external, and the second is inside it and moves together with the first, but rotates in the opposite direction. The magnetic field is excited due to the temperature gradient. But we again distort the essence when we say “the magnetic field is excited.” The fact is that it is already in an excited state. When we apply a temperature gradient, we distort this excitation into a state of imbalance. Those. We understand that the excitation process is a constant process in which the magnetic field of the magnet is located. The gradient distorts the parameters of this process so that we optically notice the difference between its normal excitation and the excitation caused by the gradient.
But why is the magnetic field of a magnet stationary in a stationary state? NO, it is also mobile, but relative to moving reference systems, for example us, it is motionless. We move in space with this disturbance of Ra and it seems motionless to us. The temperature we apply to the magnet creates a local imbalance of this focused system. A certain instability will appear in the spatial lattice, which is a honeycomb structure. After all, bees do not build their houses from scratch, but they cling to the structure of space with their building material. Thus, based on purely experimental observations, I conclude that the magnetic field of a simple magnet is a potential system of local imbalance of the lattice of space, in which, as you already guessed, there is no place for atoms and molecules that no one has ever seen. Temperature is like the “ignition key” in this local system, includes imbalance. IN this moment I am carefully studying methods and means of managing this imbalance.
What is a magnetic field and how does it differ from an electromagnetic field?
What is a torsion or energy information field?
This is all the same thing, but localized by different methods.
The current strength is a plus and a repulsive force,
tension is a minus and a force of attraction,
a short circuit, or, say, a local imbalance of the lattice - there is resistance to this interpenetration. Or the interpenetration of father, son and holy spirit. We remember that the metaphor of “Adam and Eve” is the old understanding of the X and Y chromosomes. For understanding the new is a new understanding of the old. “Current strength” is a vortex emanating from the constantly rotating Ra, leaving behind an informational interweaving of itself. Tension is another vortex, but inside the main vortex of Ra and moving with it. Visually, this can be represented as a shell, the growth of which occurs in the direction of two spirals. The first is external, the second is internal. Or one inward and clockwise, and the second outward and counterclockwise. When two vortices interpenetrate each other, they form a structure, like the layers of Jupiter, which move in different directions. It remains to understand the mechanism of this interpenetration and the system that is formed.
Approximate tasks for 2015
1. Find methods and means to control imbalance.
2. Identify the materials that most influence the imbalance of the system. Find the dependence on the state of the material according to Table 11 of the child.
3. If every living being, in its essence, is the same localized imbalance, therefore it must be “seen”. In other words, it is necessary to find a method of fixing a person in other frequency spectra.
4. The main task is to visualize non-biological frequency spectra in which the continuous process of human creation occurs. For example, using a means of progress, we analyze frequency spectra that are not included in the biological spectrum of human feelings. But we only register them, but we cannot “realize” them. Therefore, we do not see further than our senses can perceive. This is my main goal for 2015. Find a technique for technical awareness of the non-biological frequency spectrum in order to see the information basis of a person. Those. essentially his soul.
A special type of study is a magnetic field in motion. If we pour magnetic fluid onto a magnet, it will occupy the volume of the magnetic field and will be stationary. However, it is necessary to check the experiment of “Veterok” where he brought a magnet to the monitor screen. There is an assumption that the magnetic field is already in an excited state, but the volume of liquid is held in a stationary state. But I haven't checked it yet.
A magnetic field can be generated by applying temperature to a magnet, or by placing a magnet in an induction coil. It should be noted that the liquid is excited only at a certain spatial position of the magnet inside the coil, making a certain angle to the axis of the coil, which can be found experimentally.
I conducted dozens of experiments with moving magnetic fluid and set myself the following goals:
1. Identify the geometry of fluid movement.
2. Identify the parameters that affect the geometry of this movement.
3. What place does the movement of fluid occupy in the global movement of planet Earth.
4. Does the spatial position of the magnet depend on the geometry of movement acquired by it?
5. Why "ribbons"?
6. Why do ribbons curl?
7. What determines the vector of ribbon twisting?
8. Why do cones shift only through nodes, which are the vertices of the honeycomb, and only three nearby ribbons are always twisted?
9. Why does the displacement of the cones occur abruptly, upon reaching a certain “twist” in the nodes?
10. Why is the size of the cones proportional to the volume and mass of the liquid poured onto the magnet?
11. Why is the cone divided into two distinct sectors?
12. What place does this “separation” occupy in the context of interaction between the poles of the planet.
13. How does the geometry of fluid movement depend on the time of day, season, solar activity, intention of the experimenter, pressure and additional gradients. For example, a sudden change from cold to hot
14. Why the geometry of cones identical to Varja geometry- special weapons of the returning gods?
15. Is the data available in archives? special services 5 machine guns, any information about the purpose, availability or storage of samples of this type of weapon.
16. What do the gutted storehouses of knowledge of various secret organizations say about these cones and is the geometry of the cones connected with the Star of David, the essence of which is the identity of the geometry of the cones. (Masons, Juzeites, Vaticans, and other uncoordinated entities).
17. Why there is always a leader among cones. Those. a cone with a “crown” on top, which “organizes” the movements of 5,6,7 cones around itself.
cone at the moment of displacement. Jerk. “...only by moving in the letter “G” will I get to it.”...
A magnet is a body that forms a magnetic field around itself.
The force created by a magnet will act on certain metals: iron, nickel and cobalt. Objects made of these metals are attracted by a magnet.
(a match and a cork are not attracted, a nail only to the right half of the magnet, a paper clip to any place)
There are two areas where the force of attraction is maximum. They are called poles. If you hang a magnet on a thin thread, it will unfold in a certain way. One end will always point north and the other end south. Therefore, one pole is called the north, and the other - the south. 
You can clearly see the effect of the magnetic field formed around a magnet. Let's place the magnet on a surface on which metal filings have previously been poured. Under the influence of a magnetic field, the sawdust will be arranged in the form of ellipse-like curves. By the appearance of these curves, one can imagine how magnetic field lines are located in space. Their direction is usually designated from north to south. 
If we take two identical magnets and try to bring their poles closer together, we will find out that different poles attract, and similar ones repel. 
Our Earth also has a magnetic field called the Earth's magnetic field. The north end of the arrow always points north. Therefore, the north geographic pole of the Earth is the south magnetic pole because opposite magnetic poles attract. Likewise, the geographic south pole is the magnetic north pole. 
The north end of the compass needle always points north, as it is attracted by the Earth's south magnetic pole.
If we place a compass under a wire that is stretched in the direction from north to south and through which a current flows, we will see that the magnetic needle will deviate. This proves that electricity creates a magnetic field around itself. 
If we place several compasses under a wire through which an electric current flows, we will see that all the arrows will deviate by the same angle. This means that the magnetic field created by the wire is the same across different areas. Therefore, we can conclude that the magnetic field lines for each conductor have the form of concentric circles. 
The direction of magnetic field lines can be determined using the right hand rule. To do this, you need to mentally clasp the conductor with electric current with your right hand so that the extended thumb of your right hand shows the direction of the electric current, then the bent fingers will show the direction of the magnetic field lines. 
If we twist a metal wire into a spiral and run an electric current through it, then the magnetic fields of each individual turn are summed up to common field spirals. 
The action of the magnetic field of the spiral is similar to the action of the magnetic field of a permanent magnet. This principle formed the basis for the creation of an electromagnet. It, like a permanent magnet, has a south and north pole. The North Pole is where the magnetic field lines come from. 
The strength of a permanent magnet does not change over time. With an electromagnet it is different. There are three ways to change the strength of an electromagnet.
First way. Let's place a metal core inside the spiral. In this case, the actions of the magnetic field of the core and the magnetic field of the spiral are summed up.
Second way. Let's increase the number of turns of the spiral. The more turns the spiral has, the greater the effect of the magnetic field force.
Third way. Let's increase the strength of the electric current that flows in the spiral. The magnetic fields of individual turns will increase, therefore, the total magnetic field of the spiral will also increase. 
Speaker
The loudspeaker device includes an electromagnet and a permanent magnet. The electromagnet, which is connected to the loudspeaker membrane, is placed on a rigidly fixed permanent magnet. At the same time, the membrane remains mobile. Let us pass an alternating electric current through an electromagnet, the type of which depends on sound vibrations. As the electric current changes, the effect of the magnetic field in the electromagnet changes.
As a result, the electromagnet will be attracted or repelled from the permanent magnet with different strength. Moreover, the loudspeaker membrane will perform exactly the same vibrations as the electromagnet. Thus, what was said into the microphone will be heard through the loudspeaker. 
Call
An electric doorbell can be classified as an electrical relay. The reason for the intermittent sound signal is periodic short circuits and open circuits.
When the bell button is pressed, the electrical circuit is closed. The bell tongue is attracted by an electromagnet and strikes the bell. In this case, the tongue opens the electrical circuit. The current stops flowing, the electromagnet does not act and the tongue returns to its original position. Electrical circuit closes again, the tongue is again attracted by the electromagnet and strikes the bell. This process will continue as long as we press the call button. 
Electric motor
Let's install a freely rotating magnetic needle in front of the electromagnet and spin it. We can maintain this movement if we turn on the electromagnet at the moment when the magnetic needle turns the same pole towards the electromagnet.
The attractive force of the electromagnet is sufficient to ensure that the rotational movement of the needle does not stop. 
(in the picture, the magnet receives a pulse whenever the red arrow is near and the button is pressed. If you press the button when the green arrow is near, the electromagnet stops)
This principle is the basis of the electric motor. Only it is not a magnetic needle that rotates in it, but an electromagnet, called an armature, in a statically fixed horseshoe-shaped magnet, which is called a stator. Due to repeated closing and opening of the circuit, the electromagnet, i.e. the anchor will rotate continuously. 
Electric current enters the armature through two contacts, which are two insulated half rings. This causes the electromagnet to constantly change polarity. When opposite poles are opposite one another, the motor begins to slow down. But at this moment the electromagnet changes polarity, and now there are identical poles opposite each other. They push off and the motor continues to rotate. 
Generator
Let's connect a voltmeter to the ends of the spiral and begin to swing a permanent magnet in front of its turns. In this case, the voltmeter will show the presence of voltage. From this we can conclude that the electrical conductor is affected by a changing magnetic field.
From this follows the law of electrical induction: a voltage will exist at the ends of the induction coil as long as the coil is in a changing magnetic field.
The more turns an induction coil has, the more voltage appears at its ends. The voltage can be increased by making the magnetic field stronger or by causing it to change faster. A metal core inserted inside the induction coil increases the induction voltage as the magnetic field is enhanced due to the magnetization of the core. 
(the magnet begins to be waved more strongly in front of the coil, as a result of which the voltmeter needle deflects much more)
A generator is the opposite of an electric motor. Anchor, i.e. An electromagnet rotates in the magnetic field of a permanent magnet. Due to the rotation of the armature, the magnetic field acting on it is constantly changing. As a result, the resulting induction voltage changes. During a full rotation of the armature, the voltage will be positive half the time and negative half the time. An example of this is wind generator, which creates alternating voltage. 
Transformer
According to the law of induction, voltage occurs when the magnetic field in the induction coil changes. But the magnetic field of the coil will change only if an alternating voltage appears in it.
The magnetic field changes from zero to a finite value. If you connect the coil to a voltage source, the resulting alternating magnetic field will create a short-term induction voltage that will counteract the main voltage. To observe the occurrence of induced voltage, it is not necessary to use two coils. This can be done with one coil, but then this process is called self-induction. The voltage in the coil reaches its maximum after some time, when the magnetic field stops changing and becomes constant. 
The magnetic field changes in the same way if we disconnect the coil from the voltage source. In this case, the phenomenon of self-induction also occurs, which counteracts the falling voltage. Therefore, the voltage does not drop to zero instantly, but with a certain delay. 
If we constantly connect and disconnect a voltage source to the coil, then the magnetic field around it will constantly change. At the same time, an alternating induction voltage also arises. Now, instead, let's connect the coil to an AC voltage source. After some time, an alternating induction voltage appears. 
Let's connect the first coil to an alternating voltage source. Thanks to the metal core, the resulting alternating magnetic field will also act on the second coil. This means that alternating voltage can be transferred from one electric current circuit to another, even if these circuits are not connected to one another. 
If we take two coils with identical parameters, then in the second we can get the same voltage that acts on the first coil. This phenomenon is used in transformers. Only the purpose of the transformer is to create a different voltage in the second coil, different from the first. To do this, the second coil must have a greater or lesser number of turns. 
If the first coil had 1000 turns, and the second - 10, then the voltage in the second circuit will be only a hundredth of the voltage in the first. But the current strength increases almost a hundred times. Therefore transformers high voltage necessary to create a large current. 
If an electric current is passed through iron, the iron will acquire magnetic properties while the current passes. Some substances, for example, hardened steel and a number of alloys do not lose their magnetic properties even after the current is turned off, unlike electromagnets.
These bodies that retain magnetization for a long time are called permanent magnets. People first learned to extract permanent magnets from natural magnets - magnetic iron ore, and then they learned how to make them themselves from other substances, artificially magnetizing them.
Magnetic field of a permanent magnet
Permanent magnets have two poles called north and south magnetic fields. Between these poles, the magnetic field is located in the form of closed lines directed from the north pole to the south. The magnetic field of a permanent magnet acts on metal objects and other magnets.
If you bring two magnets close to each other with like poles, they will repel each other. And if they have different names, then they attract each other. The magnetic lines of opposite charges seem to be closed on each other.
If the magnetic field gets into metal object, then the magnet magnetizes it, and the metal object itself becomes a magnet. It is attracted by its opposite pole to the magnet, so metal bodies seem to “stick” to the magnets.
Earth's magnetic field and magnetic storms
Not only magnets have a magnetic field, but also our home planet. The Earth's magnetic field determines the action of compasses, which have been used by people since ancient times to navigate the terrain. The earth, like any other magnet, has two poles - north and south. The Earth's magnetic poles are close to the geographic poles.
The Earth's magnetic field lines "exit" from the Earth's north pole and "enter" at the location of the south pole. Physics confirms the existence of the Earth's magnetic field experimentally, but cannot yet fully explain it. It is believed that the reason for the existence of terrestrial magnetism is the currents flowing within the Earth and in the atmosphere.
From time to time, so-called “magnetic storms” occur. Due to solar activity and the emission of streams of charged particles by the Sun, the Earth's magnetic field changes briefly. In this regard, the compass may behave strangely and the transmission of various electromagnetic signals in the atmosphere is disrupted.
Such storms can cause discomfort in some sensitive people, since the disruption of normal earth magnetism causes minor changes in a rather delicate instrument - our body. It is believed that with the help of earth's magnetism, migratory birds and migrating animals find their way home.
In some places on Earth there are areas where the compass does not consistently point north. Such places are called anomalies. Such anomalies are most often explained by huge deposits of iron ore at shallow depths, which distort the Earth’s natural magnetic field.
The term “magnetic field” usually means a certain energy space in which the forces of magnetic interaction manifest themselves. They affect:
individual substances: ferrimagnets (metals - mainly cast iron, iron and their alloys) and their class of ferrites, regardless of state;
moving charges of electricity.
Physical bodies that have a total magnetic moment of electrons or other particles are called permanent magnets. Their interaction is shown in the picture magnetic force lines.
They were formed after bringing a permanent magnet to the back of a cardboard sheet with an even layer of iron filings. The picture shows clear markings of the north (N) and south (S) poles with the direction of the field lines relative to their orientation: exit from the north pole and entrance to the south.
How is a magnetic field created?
The sources of the magnetic field are:
permanent magnets;
moving charges;
time-varying electric field.
Every kindergarten child is familiar with the action of permanent magnets. After all, he already had to sculpt pictures of magnets on the refrigerator, taken from packages with all sorts of delicacies.
Electric charges in motion usually have significantly more energy magnetic field than . It is also designated by lines of force. Let's look at the rules for drawing them for a straight conductor with current I.
The magnetic field line is drawn in a plane perpendicular to the movement of the current so that at each point the force acting on the north pole of the magnetic needle is directed tangentially to this line. This creates concentric circles around the moving charge.
The direction of these forces is determined by the well-known rule of a screw or gimlet with right-hand thread winding.
Gimlet rule
It is necessary to position the gimlet coaxially with the current vector and rotate the handle so that the translational movement of the gimlet coincides with its direction. Then the orientation of the magnetic field lines will be shown by rotating the handle.
In a ring conductor, the rotational movement of the handle coincides with the direction of the current, and the translational movement indicates the orientation of the induction.
Magnetic lines of force always leave the north pole and enter the south pole. They continue inside the magnet and are never open.
Rules for the interaction of magnetic fields
Magnetic fields from different sources add to each other to form a resulting field.
In this case, magnets with opposite poles (N - S) attract each other, and with like poles (N - N, S - S) they repel. The interaction forces between the poles depend on the distance between them. The closer the poles are shifted, the greater the force generated.
Basic characteristics of the magnetic field
These include:
magnetic induction vector (B);
magnetic flux(F);
flux linkage (Ψ).
The intensity or strength of the field impact is estimated by the value magnetic induction vector. It is determined by the value of the force “F” created by the passing current “I” through a conductor of length “l”. В =F/(I∙l)
The unit of measurement of magnetic induction in the SI system is Tesla (in memory of the physicist who studied these phenomena and described them mathematical methods). In Russian technical literature it is designated “Tl”, and in international documentation the symbol “T” is adopted.
1 T is the induction of such a uniform magnetic flux, which acts with a force of 1 newton for each meter of length of a straight conductor perpendicular to the direction of the field, when a current of 1 ampere passes through this conductor.
1T=1∙N/(A∙m)
The direction of vector B is determined by left hand rule.
If you place the palm of your left hand in a magnetic field so that the lines of force from the north pole enter the palm at a right angle, and place four fingers in the direction of the current in the conductor, then the protruding thumb will indicate the direction of the force on this conductor.
In the case when the conductor with electric current is not located at right angles to the magnetic lines of force, the force acting on it will be proportional to the magnitude of the flowing current and the component of the projection of the length of the conductor with current onto a plane located in the perpendicular direction.
The force acting on an electric current does not depend on the materials from which the conductor is made and its cross-sectional area. Even if this conductor does not exist at all, and moving charges begin to move in another medium between magnetic poles, then this force will not change in any way.
If inside a magnetic field at all points the vector B has the same direction and magnitude, then such a field is considered uniform.
Any environment that has , affects the value of the induction vector B .
Magnetic flux (F)
If we consider the passage of magnetic induction through a certain area S, then the induction limited by its limits will be called magnetic flux.
When the area is inclined at some angle α to the direction of magnetic induction, the magnetic flux decreases by the amount of the cosine of the angle of inclination of the area. Its maximum value is created when the area is perpendicular to its penetrating induction. Ф=В·S
The unit of measurement for magnetic flux is 1 weber, defined by the passage of induction of 1 tesla through an area of 1 square meter.
Flux linkage
This term is used to obtain the total amount of magnetic flux created from a certain number of current-carrying conductors located between the poles of a magnet.
For the case when the same current I passes through the winding of a coil with a number of turns n, then the total (linked) magnetic flux from all turns is called flux linkage Ψ.
Ψ=n·Ф . The unit of flux linkage is 1 weber.
How is a magnetic field formed from an alternating electric
Electromagnetic field interacting with electric charges and bodies possessing magnetic moments, is a combination of two fields:
electrical;
magnetic.
They are interconnected, represent a combination of each other, and when one changes over time, certain deviations occur in the other. For example, when creating an alternating sinusoidal electric field in a three-phase generator, the same magnetic field with the characteristics of similar alternating harmonics is simultaneously formed.
Magnetic properties of substances
In relation to interaction with an external magnetic field, substances are divided into:
antiferromagnets with balanced magnetic moments, due to which a very low degree of magnetization of the body is created;
Diamagnets with the property of magnetizing an internal field against the action of an external one. When there is no external field, their magnetic properties do not appear;
paramagnetic materials with magnetizing properties of the internal field in the direction of the external field, which have a low degree;
ferromagnets having magnetic properties without applied external field at temperatures below the Curie point;
ferrimagnets with magnetic moments unbalanced in magnitude and direction.
All these properties of substances have found various applications in modern technology.
Magnetic circuits
All transformers, inductors, electric cars and many other devices.
For example, in a working electromagnet, the magnetic flux passes through a magnetic core made of ferromagnetic steel and air with pronounced non-ferromagnetic properties. The combination of these elements makes up a magnetic circuit.
Most electrical devices have magnetic circuits in their design. Read more about this in this article -