The principle of magneto electricity experiment, the principle of electromagnet experiment

The principle of magnetic generation is to cut the magnetic inductance line, the principle of electromagnetism metal wire through the current, then the space around the wire will produce a circular magnetic field, the specific principle of the generator is to use the enameled wire in the engine to become an energized conductor after the principle of movement in the magnetic field of the reaction, the specific working principle or cutting the magnetic inductance line, whether it is hydroelectric power or nuclear reactor, thermal power farm, the final working principle is to drive the engine to rotate, generate current, the motor power supply of the four-wheel drive vehicle can rotate, rotation is to generate current, That is, to use this principle.

There are two conditions that are first required for a conductor to generate an electric current:1Loop closure.

2.The magnetic flux ( ) of the closed loop changes. Broadly speaking, the current generated by a magnetic field is caused by a change in the magnetic flux in the conductor circuit.

F=QVB is only applicable to the case where the conductor cuts the magnetic inductance line (think about the magnetic flux of the conductor in series with the magnetic inductance line when the conductor cuts the magnetic inductance line, does the magnetic flux change with it?). It has limitations and is not suitable for situations where the magnetic field (flux) does not change in the loop. That is to say that it is one of those cases that can be explained by the fact that the Lorentz force directly produces an electric current by the movement of the charge.

The principle of magnetism is essentially explained from the point of view of "field", that is, the effect of "magnetic field" on "charge". The Lorentz force is also caused by the magnetic field and can be used as an intermediate product to connect the magnetic field with the electric charge.

The right-hand rule determines the direction of the magnetic field, and the magnetic inductance lines are closed curves.

The principle of the electromagnet experiment is electromagnetic induction.

The phenomenon of electromagnetic induction was developed by the British physicist Michael Faraday.

What is found specifically refers to the magnetic flux that is put into the conductor to change.

There will be an electromotive force in it.

If the conductor is closed, a crack induced current will be formed. It can also be explained by the fact that in a closed circuit, the conductor moves to cut the magnetic inductance line, which generates an induced current.

The phenomenon of electromagnetic induction is widely used in modern times, and it has played an extremely important role in promoting the development of the old skills of science and technology.

Summary. In order to obtain a strong magnetic field, the coil should be embedded in the stator core slot, and the electromagnet should be used instead of the permanent magnet as the rotor Large rotating pole generator can provide a voltage of several thousand volts to tens of thousands of volts, and the power can reach hundreds of thousands of kilowatts, or even more than one million kilowatts

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First of all, we need to connect a circuit that can generate electricity magnetically, and find two small magnets.

The positive and negative poles are reversed, one is placed on the table, resting, and the other is held in the hand.

Feeling a little resistance, one end of the wire is connected to the light-emitting diode.

Then cut the magnetic inductance line between two small magnets.

In order to obtain a strong magnetic field, the coil should be embedded in the stator core groove, and the electromagnet should be used instead of the permanent magnet as the rotor Large rotating magnetic pole generator can provide a voltage of several thousand volts to tens of thousands of volts, and the power can reach hundreds of thousands of kilowatts, or even more than one million kilowatts.

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The principle of magnetoelectric generation refers to the phenomenon that when a magnetic field interacts with a conductor, an electric current is generated in the conductor

1.Magnetic field generation and basic concepts:

The magnetic field is generated by the motion of a charged object and can be generated by passing an electric current through a wire or magnet; A magnetic field is made up of magnetic field lines and is directional and magnitude. The strength of the magnetic field can be expressed by the intensity of magnetic induction b in Tesla (t).

2.Faraday's Law of Electromagnetic Induction:

Faraday's law of electromagnetic induction is a law that describes the interaction between a magnetic field and a conductor to produce an induced electromotive force; When the conductor moves relative to the magnetic field, or when the magnetic field changes, an induced electromotive force is generated in the conductor; The magnitude of the induced electromotive force is proportional to the rate of change of the magnetic induction intensity, and the direction is determined by the right-hand rule.

3.Induced electromotive force and current generation:

When an induced electromotive force is generated in a conductor, if the conductor is a closed loop, the induced electromotive force drives the charge to move within the conductor to form an electric current; The free electrons in the conductor are subjected to the force, move through the conductor, and generate an electric current; The magnitude of the current is related to the induced electromotive force and the impedance of the conductor.

4.Application of the principle of magnetism and electricity:

The principle of magnetism is the basic principle in electric power and electronic technology, and is widely used in the working principle of electromagnetic equipment such as transformers, generators, motors, etc.; The principle of magnetoelectric generation is also used in industrial fields such as induction heating and induction welding; The generation of induced electromotive force can also be used to measure the strength and direction of magnetic fields, such as Hall effect sensors.

5.Limitations of the principle of magnetogeneticism:

The principle of magneto-generation is only applicable to the generation of induced electromotive force, and cannot directly convert the magnetic field into electrical energy; The energy conversion efficiency in the principle of magneto-electrification is affected by many factors, such as the strength of the magnetic field, the material and shape of the conductor, etc.

The principle of magnetoelectric generation refers to the phenomenon that when the magnetic field interacts with the conductor, an induced electromotive force will be generated in the conductor, which will drive the charge finger to move in the conductor to form an electric current. This principle is the basis of power and electronic technology, and is widely used in the working principle of various electromagnetic devices as well as induction heating and induction welding in the industrial field. However, the principle of magneto-generation can only realize the conversion from magnetic field to electrical energy, and its energy conversion efficiency is affected by many factors.

The principle of magnetoelectric generation refers to the fact that when a conductor changes the magnetic flux in the magnetic field, it will generate an electromotive force inside the conductor, resulting in a circular rise of electric current.

This phenomenon is described by Faraday's law of electromagnetic induction. According to this law, when the magnetic flux changes through a region, an electromotive force is induced in that region. The change in magnetic flux can be produced by a change in the density of magnetic inductance lines in the magnetic field or by the relative motion of the conductor and the magnetic field.

The reason for this phenomenon is that during the change of the magnetic field, the magnetic field exerts a force on the free electrons in the conductor, which causes the electrons to move in the conductor, which in turn generates an electrically induced electromotive force. If the conductor forms a loop, then this electromotive force causes the electrons to form a flow in the conductor, resulting in an electric current.

In general, the principle of magnetogenesis is based on the principle of electromagnetism, mainly the interaction between the magnetic field and the electric field. The application of magnetism is very wide, including various electrical equipment and technologies, such as generators, electric motors, electromagnets, and many more.

Magnetic electro-reaction

When a conductor moves in a magnetic field or the strength of the magnetic field changes, an electric field is generated inside the conductor. This electric field causes electrons to flow inside the conductor, resulting in an electric current. If the conductor is closed into a loop, an orange electromotive force and current will be formed.

Magneto-electric reactions are based on the principles of electromagnetism and are known in physics as Faraday's law of electromagnetic induction. This law describes the phenomenon of electromotive force and electric current caused by changes in magnetic flux. Magneto-electro-reaction is an important application of electromagnetism, which has a wide range of applications in production and life, such as generators, transformers, electromagnetic induction furnaces and so on.

In industrial production, magneto-electric reactions are widely used in generators and transformers to convert and transmit electrical energy through the interaction between changing magnetic fields and conductors. At the same time, magneto-electric reaction is also widely used in induction furnaces, which use electric current to generate heat energy and use it to melt metals and other materials to achieve automation and efficiency in industrial production.

The principle of electromagnetism is the presence of a magnetic field around an energized conductor.

The direction of the magnetic field can be determined according to the "right-handed spiral rule" also known as "Ampere's rule one", hold the straight wire with the right hand, and let the direction of the thumb point in the direction of the current, then the direction of the four fingers bending is the direction of the magnetic field. In fact, the magnetic field generated by this straight wire is similar to the effect of placing a circle of small magnets around the wire with the ends of the NS poles connected.

If a long metal wire is wound in one direction on a hollow cylinder, the object formed is called a solenoid. If this solenoid is energized, each turn of the solenoid will produce a magnetic field, and the direction of the magnetic field is to hold the energized solenoid with your right hand and let the four fingers point in the direction of the current, then the end of the thumb is the n pole of the energized solenoid.

Then, at the position between the two adjacent turns, the total magnetic field cancels out due to the opposite direction of the magnetic field; On the other hand, inside and outside the solenoid chain, the magnetic fields generated by each turn of the coil are superimposed on each other to form the shape of the magnetic field. It can also be seen that the shape of the magnetic field on the outside of the solenoid is the same as the shape of the magnetic field produced by a magnet.

Introduction to Magnetic Fields:

Magnets attract substances such as steel. It has the strongest ability to attract steel at its two ends, which are called magnetic poles. A magnet that can rotate freely, such as a suspended magnetic needle, and the magnetic pole of the guide when stationary is called the south pole, also known as the s pole; The magnetic pole pointing north is called the North Pole, also known as the N-pole.

The opposite-name poles attract each other, and the opposite-name poles repel each other, and the property of magnets attracting iron, cobalt, nickel and other substances is called hail and diamagnetism. The area where the magnet is magnetically strong at both ends is called the magnetic pole, with one end being the north pole (n pole) and the other end being the south pole (s pole). Experiments show that the same polar poles are repulsed by each other, and the opposite poles are attracted to each other.

There are many primary magnets with two opposite poles in iron, and when there is no external magnetic field, these primary magnets are arranged disordered, and their magnetism cancels each other out and does not show magnetism to the outside. When the iron is brought close to the magnet, these protomagnets are neatly arranged under the action of the magnet, so that the end close to the magnet has a polarity opposite to the polarity of the magnet and attracts each other.