Senior 2 Physics Triboelectric Induction Induction Contact Electrolysis Difference Ask for help.

The difference and connection between the three power generation methods:

Mode: Triboelectric Electrification; Induction of electricity ; Contact is electrified.

Generation and conditions When two different insulators rub against each other; When the conductor is close to a charged body; When a conductor comes into contact with a live conductor.

Phenomenon Two objects carry an equal amount of dissimilar charge; The conductor has the same amount of dissimilar charge at both ends, and the electrical properties are "close to different and far the same" with the original charged body; A conductor has a charge of the same electrical properties as a charged body.

Causes: The atomic nuclei of different substances have different binding forces on electrons outside the nucleus, resulting in electron gain and loss; The free electrons in the conductor are attracted (repulsed) by a positively (negatively) charged object and move closer (away); The free charge is transferred between the charged body and the conductor.

For example, the friction of the fur and rubber rods are positively and negatively charged, respectively; Conductors placed in an electric field have equal amounts of dissimilar charges at both ends; The working principle of the electroscope.

Essence is the transfer of electric charges between or within objects.

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1.The two sides of the friction energizing must be insulators, (but if the conductor can also be frictionally energized in extreme cases) itself is not electrified, but can be electrified.

Triboelectric activation can occur in insulators. The reason is: the ability of different substances to attract electrons is different, and the difference between the two is: induction of electricity generally makes no contact, and electromagnetic field is used as a means to induce electricity.

It is highly recommended that you go to the sophomore physics elective 3-1

The essence of electricity initiation is the transfer of electrons.

1. The example introduced in the book is that two parties are insulators, but in fact, when two different metals are in contact, when there is a temperature difference, an electric current will also be formed (thermocouple thermometers are made according to this principle). We know that there are reactive metals and inactive metals, and reactive metals are prone to lose electrons, and when two different metals are put together, there may also be electron transfer.

2. In a sense, the "energized party" that contacts and induces electricity should be conductors. This is because these two types of electricity require a charge to move, and in the conductor there are freely moving electrons (or holes in semiconductors).

3. It is not necessarily divided, it is only divided when two identical objects come into contact (you will know the specific reason after learning this chapter).

Take a closer look at the books, they are all in the books.

The difference between triboelectric energization, induction energized and contact energizing is: different principles, different operations, and different acting energies.

First, the principle is different.

1. Triboelectric Electricity: It is the result of the transfer of electrons from one object to another, so that the two objects carry the same amount of charge.

2. Induced electricity: It is a phenomenon of redistribution of the charge of the object under the action of the electrostatic field.

3. Contact electrification: Heterogeneous materials are in contact with each other, due to the different work functions of the materials, when the distance between the two materials is close to the atomic level (about 25 angstroms), electric charges will be generated on the two surfaces in contact, thus forming the phenomenon of charged bodies.

Second, the operation is different.

1. Triboelectric Electrification: When two objects rub against each other, such as rubbing with silk with a glass rod, some electrons of the glass rod are transferred to the silk, the glass rod is positively charged due to the loss of electrons, and the silk is negatively charged due to the electrons. Rub the rubber rod against the fur, some of the electrons of the fur are transferred to the bright and virtual rubber rod, the fur belt is positively charged, and the rubber rod carries the same amount of negative electricity.

2. Induction of electricity: first connect the two conductors into the electric field to generate electrostatic induction, after the two conductors induce positive and negative charges, the two conductors are separated and then purely removed from the electric field, and the two conductors have positive and negative charges respectively.

3. Contact electrification: two objects are in contact with each other without friction, when the two objects are separated again, static electricity is generated, the material with high work function is negatively charged, and the material with low work function is positively charged.

Third, the action energy is different.

1. Triboelectric energy: It is caused by heat energy.

2. Induction of electricity: action by field energy.

3. Contact electricity: by electrical energy.

Difference: Triboelectric Electrification: When two objects rub against each other, because the nuclei of different objects have different abilities to bind electrons outside the nucleus, one of them must lose some electrons and the other object gains excess electrons.

This transfer of electrons is the essence of triboelectric induction. It is also the transfer of electrons that makes the object charged.

Induced Electrification: Under the action of the charge on the charged body, the positive and negative charges on the conductor are separated, so that the charge is transferred from one part of the conductor to the other.

Contact Electrification: Heterogeneous materials are in contact with each other, due to the different work functions of the materials, when the distance between the two materials is close to the atomic level, an electric charge will be generated on the two surfaces in contact, thus forming a phenomenon of charged bodies.

Contact: If A is positively charged and B is uncharged, after A comes into contact with B, a part of A's charge is transferred to B.

Friction: A is a glass rod, B is a silk scarf, after AB rubbing, A loses its negative charge and is positively charged.

Induction: A positively charged Yuanling A object approaches the uncharged B object, so that the end of the parallel cavity B close to A is negatively charged, and the end away from A is positively charged.

The friction charge with the same amount of dissimilar charge, the contact charge with the same amount of the same charge, the induction charge rearranged.

When two objects rub against each other, some electrons that are not tightly bound tend to transfer from one object to another, so the original electrically neutral object is negatively charged due to the electron, and the object that loses electrons is positively charged, which is the starting point of friction.

When a charged body is close to the conductor, due to the mutual attraction or repulsion between the charges, the free charge in the conductor will tend to or away from the charged body, so that the end of the conductor close to the charged body has a different charge, and the end away from the charged body has the same charge, which is induced electricity, also called electrostatic induction.

Contact electrification means that the uncharged object touches the charged object, then the uncharged object also carries the same charge as the charged object, such as the negatively charged rubber rod and the uncharged electroscope metal ball, the electroscope will be negatively charged, and the metal foil will be opened.

For example, the rubber rod rubbed with fur is negatively charged, and the fur belt is positively charged; The glass rod rubbed with silk is positively charged, and the silk is negatively charged. Fur and rubber rods, silk and glass rods, they carry the same amount of electricity.

Contact charge is transmitted, and induction is charge redistribution, so the total number of contact charges changes, while induction does not.

In essence, triboelectric is a process of contact and separation, resulting in an imbalance between positive and negative charges. Friction is a process of constant contact and separation. Therefore, triboelectric initiation is essentially contact separation electrolysis. In everyday life, all kinds of objects can generate static electricity due to movement or friction.

Another common type of electricity generation is induction charging. When a charged object approaches an uncharged object, negative and positive charges are induced at both ends of the uncharged conductor, respectively.

Agree with the above view.

PS: Induced electrification refers to the movement of a conductor cutting magnetic inductance lines in a closed circuit, thereby generating an induced current.

It is called the phenomenon of current induction.

Generally speaking, it is the use of magnetism to generate electricity and convert mechanical energy into electrical energy.

Generators use this principle!

The three methods of electrification, triboelectric initiation, contact electrolysis, and induction energizing, do you know their principles?

Triboelectric activation can occur in insulators.

The reason is that the ability of different substances to attract electrons is different, and friction causes electrons to run away from substances with a poor ability to bind electrons like stronger, unbalanced positive and negative charges, and thus become electrified.

In the final analysis, electrons are transferred from one object to another, and neither object can form a pathway with the earth or other conductors, so one is positively charged and the other is negatively charged.

If it is unbalanced, it will be electrified.

An atom gains electrons to be negatively charged, and electrons lost is positively charged.

The party that is contacted (or induced) by contact and induction must be a conductor, otherwise no electricity will be generated. The contact party can be either a conductor or an insulator as long as it is electrified.

The difference between the two is:

Generally speaking, induced electricity is not contacted, and the electromagnetic field is used as a means to induce the electric object as a whole, and the electrons are biased.

The object that touches the electrification is one party that acquires the charge of the other.

Triboelectric Conduction: When two objects rub against each other, some electrons that are not tightly bound tend to move from one object to another, so that the original electrically neutral object is negatively charged due to the electrons gained, and the object that loses electrons is positively charged.

Electrostatic induction: The phenomenon of moving an electric charge closer to an uncharged conductor can make the conductor electrified, which is called electrostatic induction. Inductive Electrification: The use of electrostatic induction to electrify an object is called inductive electrification.

Contact Electrification: Refers to the phenomenon in which an uncharged conductor separates by coming into contact with another charged body, thus becoming a charged body. The distribution of charge in the two conductors after contact is related to the shape and surface area of the conductor.

If the two conductors are identical, the amount of charge of the original charged conductor will be evenly distributed between the two conductors. (Actually, it's the transfer of electrons).