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No. Charges cannot be created in a vacuum, nor can they disappear in a vacuum.
The principle of electromagnetic induction is that the electrons that move randomly in the original metal move in a directional direction under the action of the magnetic field, thus forming an electric current.
Electrons are inherently there, but the direction of movement is limited, and they can only move in a directional direction. And before it was only messy and moving.
Unipolar is the same.
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The magnetic inductance line is the magnetic inductance line, there is no pole, only the direction... It is important to remember that magnetic lines are closed directed curves... The object is in a uniform magnetic field, and cutting the magnetic inductance lines does not cause a change in the potential of the object, and no new charge is generated, because the magnetic flux does not change...
The change in charge, i.e. potential, depends on the change in the derivative of magnetic flux, and that's it... As for the usual study of cutting magnetic inductance lines, it is only a special research method under special circumstances, and it is not the essence of the change of electric potential in the magnetic field, and it is correct only under limited special conditions...
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What is cutting unipolar magnetic inductance lines, now there are no magnetic monopoles found at all, how can there be unipolar magnetic inductance lines, magnetic inductance lines are all closed loops. The magnetic inductance line from one end must come back from the back of this end. Generating an electric charge?
How can electric charges be produced for no reason, that does not violate the conservation of matter. If the wire cuts the magnetic inductance line, the charge itself is present in the conductor, but the electromagnetic induction causes the charge to move, resulting in an electric current.
Cutting the n-class or single-sided S pole on one side will not produce an electric charge, only an electric current, and I didn't say that there will be no unprovoked production of electric charge, and the statement that an electric charge will be generated is wrong.
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There is no essential difference between the magnetic inductance lines of the magnetic unipolar and other magnetic inductance lines, they are all the same thing, so it is inevitable that the magnetic inductance lines are cut to produce induced current.
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Yes. It adheres to the principle of electromagnetic induction.
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The principle of cutting magnetic inductance lines to generate electric current:
The phenomenon in which a conductor cuts a magnetic inductance line and generates an electric current is called electromagnetic induction.
When a part of the conductor of the closed circuit is cut in the magnetic field, the free electrons in the conductor are still moving irregularly, but at the same time, they all move with the conductor, and the effect is that they move with the conductor, so the free electrons in the conductor are subjected to the same direction of the force of the magnetic field.
Under the action of this force, the free electrons move in the same direction, all from one end of the conductor to the other, so that one end of the conductor has an excess positive charge and one end has an excess negative charge, which also generates a voltage. Because the circuit is closed, the charge is driven by the voltage and moves directionally, forming an electric current.
Cutting Magnetic Inductance Line Applications:
1. Electromagnetic induction.
If a part of the conductor in the closed circuit moves in a magnetic field to cut magnetic inductance lines, the electrons in the conductor will be subjected to the Lorentz force, which is a non-electrostatic force that can cause a potential difference and produce an electric current, which is called induced current.
2. Generator.
The principle of the generator is electromagnetic induction, and the basic structure of the generator is the magnetic field and the coil that rotates in the magnetic field. Its energy conversion is the conversion of mechanical energy into electrical energy.
3. DC generator.
Both the alternator and the DC generator generate alternating current internally, while the outside of the DC generator generates direct current, and the outside of the alternator generates alternating current.
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Answer: Hello The principle is that when a part of the conductor of the circuit is closed, when the movement of cutting the magnetic inductance line in the magnetic field is made, an electric current will be generated in the conductor, this phenomenon is called electromagnetic induction, and the current generated is called induced current.
Two conditions must be met to generate an induced current:
1. A part of the conductor of the closed circuit;
2. Do the movement of cutting magnetic inductance lines. If the circuit is not closed, only the induced voltage is generated, and the induced current cannot be generated.
Cutting magnetic lines is when an object moves in a magnetic field that has a certain velocity in the direction of perpendicular (or non-parallel) to the magnetic lines. However, in reality, magnetic inductance lines do not exist, and are only hypothetically used to describe the distribution of magnetic fields.
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Ask the same brother. The Three Gorges Power Station is also cutting magnetic inductance lines? Huge amount of energy** coming? Cutting magnetic lines? Cutting whose magnetic inductance lines produces so much energy?
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There is no induced current when the magnetic inductance line is cut, and the conductor must obtain the induced current when the magnetic inductance line is cut; To make the conductor travel a complete circuit; Only the loop will have a voltage drop, and a voltage drop will produce an induced current.
The object moves in a magnetic field, and this motion must be at an angle to the magnetic inductance lines, not parallel to the magnetic inductance lines. A part of the conductor of the closed circuit cuts the magnetic inductance line in the magnetic field, and an electric current is generated in the conductor.
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Not necessarily, some conductors will have induced electromotive force when they cut magnetic inductance lines, and if the circuit is closed, there will be induced current. The conditions for the generation of induced current are: a part of the conductor does the movement of cutting magnetic inductance lines; 2. Circuit closing.
If the whole circuit is in a uniform magnetic field, the magnetic flux remains unchanged, and there will be no induced electromotive force and no induced current.
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The movement of a closed coil in a magnetic field requires an induced current under only one condition: a change in the magnetic flux passing through the coil (there are many possible reasons for the change).
Therefore, a closed coil moving in a magnetic field does not necessarily have an induced current. The coil does not induce a current when translated in a uniform magnetic field (e.g., the coil plane is perpendicular to the magnetic field and moves in the direction of the magnetic field).
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This method is wrong because when a closed circuit moves parallel to the magnetic inductance lines in the magnetic field, it does not cause a change in magnetic flux and does not generate current.
If a part of the conductor in a closed circuit moves in a magnetic field to cut magnetic inductance lines, the electrons in the conductor will be subjected to the Lorentz force, which is a non-electrostatic force that can cause a potential difference and generate an electric current.
The direction of the induced current can be right-handed rule (this point is often confused, you can find that the word "force" is left-handed, so use the left hand; And the word "electricity" is handed to the right, so use the right hand to memorize the mantra: left to force right to generate electricity) to judge. This phenomenon of magnetism generating electricity is called electromagnetic induction, and was first discovered by Faraday.
Extended Materials. The magnitude of the induced current is proportional to the magnetic induction intensity b, the length of the wire l, the speed of motion v, and the sine of the angle between the direction of motion and the direction of the magnetic inductance line. Increasing the magnetic induction intensity B, increasing the length of the wire L of the cutting magnetic inductance line, increasing the cutting speed v and cutting the magnetic inductance line as perpendicular as possible (=90°) can increase the induced current.
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The movement of the conductor to cut the magnetic inductance line does not necessarily produce an electric current.
1. The whole coil is cut in the magnetic field, and the magnetic flux through the coil remains unchanged, and there is no induced current in the coil.
2. The circuit is not closed, and a part of the conductor of the circuit does not produce induced current when it cuts the magnetic inductance line.
3. A part of the conductor of the closed circuit does the movement of cutting magnetic inductance lines to generate induced current.
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The movement of a conductor in a magnetic field does not necessarily produce an electric current. If the conductor moves at a certain angle to the magnetic inductance line in the magnetic field (that is, it does not move along the magnetic inductance line, or cuts the magnetic inductance line), an electromotive force will be generated. At this point, the conductor can be seen as a power source.
As soon as a section of wire is connected, an electric current will be generated. That's what the book says"When a conductor in a closed circuit cuts a magnetic inductance line, an electric current is generated"The root cause of this is that the magnetic flux has changed, and the emphasis is on the change, not the amount of magnetic flux.
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Summary. Matter is composed of positively charged nuclei and negatively charged electrons, when the conductor cuts the magnetic inductance line, the positive and negative charges inside the conductor will be forced, but they are forced in opposite directions, at this time the nucleus accounts for almost all the conductor mass, and the positively and negatively charged particles conform to the conservation of momentum, so the phenomenon of the nucleus does not move and the electrons move.
Matter is composed of positively charged nuclei and negatively charged electrons, when the conductor cuts the magnetic inductance line, the positive and negative charges inside the conductor will be forced, but they are forced in opposite directions, at this time the nucleus accounts for almost all the conductor mass, and the positively and negatively charged particles conform to the conservation of momentum, so the phenomenon of the nucleus does not move and the electron collapses.
Electrons move to produce an electric current.
What about the uncut? If the magnetic inductance line is not cut, no current will be generated.
Why is everything stressed?
Think about it, for example, if you chop wood, do you have to cut the wood in parallel or do you cut the wood horizontally?
It's just that cutting magnetic lines is the force on the electrons, and the same understanding is <><
Theoretically, there can be, but nature has not yet discovered it. Molecular currents can be thought of as magnetic dipoles, and they correspond only to the properties of polarized charges (pairs). In addition, Dirac had shown that the product of a magnetic monopole and charge was a constant, and Jasckson's book of classical electrodynamics gave the assumption that if each charged particle had a magnetic monopole with a constant proportion to the charge, then Maxwell's equations could still return to the form without magnetic monopoles by means of coordinate transformations. >>>More
Nima: Go upstairs, since you say that the No. 2 mouth can be cut When you are cutting the board, you can cut it It doesn't matter if you cut into the line 70 board, you must cut from the edge of the board It is impossible to make a hole so 5mm is OK It's a waste After all, such a thick board The fire must be adjusted well I often cut the 70 board The gun must be adjusted vertically When cutting in, bake it with fire in the place where it is cut In the red, open high-pressure oxygen on the outside of the board Cut in at a slow speed Adjust to the right number of degrees when completely worn The board surface must be clean Otherwise, it is easy to break the fire It will be troublesome Where there is rust, it is best to use a grinder to grind it Cut thick plates comfortably A plate is cut for a day Just sit on the machine One shift is over Hehe I use a 70 plate for No. 4 cutting nozzle No pressure Oh Hehe If you don't know, it's better to use No. 5 or No. 6.
Cutting method: The chamfering of the wall corner of the gypsum line is determined according to the size of the plaster line and the height of the paste. Stand the plaster line against the corner of the wall, draw two marking lines with a marker pen on both sides of the plaster line, and then measure the size of both sides with a steel tape measure. >>>More
The Informant".
Yesterday, I saw the movie viewing call post sent by the mother ape in the Tianya Immortal Edition, although I still have to work the night shift at night, but after a little consideration, I signed up, to be honest, it was the first time to participate in this kind of activity. >>>More
There must be electricity, which is energized to generate a magnetic field, and then the shaft of the generator is driven by an external force, so that there is magnetic flux in the coil. >>>More