Is voltage only suitable for electrostatic fields?

The working principle of the triode To understand the amplification effect of the triode, it is important to remember that energy will not be generated for no reason, so the transistor must not produce energy. But the power of the transistor lies in:

It can control a large current with a small current. The principle of amplification lies in the fact that a large static DC is controlled by a small AC input.

Let's say the transistor is a dam, and the strange thing about this dam is that there are two valves, one big and one small. The small valve can be opened by manpower, and the large valve is very heavy, and it cannot be opened by manpower, and can only be opened by the hydraulic power of the small valve. Therefore, the usual workflow is that whenever the water is released, people open the small valve, and the small water trickles out, and this trickle hits the switch of the big valve, and the big valve opens and the turbulent river flows down.

If you keep changing the size of the small valve opening, then the large valve will also change accordingly, and if you can change it strictly in proportion, then perfect control is complete. Here, UBE is the small water flow, UCE is the big water flow, and the person is the input signal. Of course, it would be more accurate to compare the flow of water to an electric current, because the transistor is, after all, a current control element.

If one day, the weather is very dry and the river is gone, that is, the big water is empty. The administrator opened the small valve, and although the small valve continued to impact the large valve and make it open, there was no water flowing out because there was no water flow. This is the cut-off zone in the transistor.

The saturation zone is the same, because at this time the river water has reached a very large level, and the size of the valve opened by the administrator is useless. If you don't open the valve, the river will rush away by itself, which is the breakdown of the diode. In analog circuits, the valve is generally ajar, and the size of the output water flow is determined by controlling its opening size.

When there is no signal, the water will flow, so when it is not working, there will also be power consumption. In digital circuits, the valve is either open or closed. When not working, the valve is completely closed and there is no power consumption.

The constant electric field is embedded in the electrostatic field, which is the relationship between the contained and the included. Electrostatic Field: An electric field formed by a stationary field source charge, in which the object placed in it is subjected to an electric field force.

Constant electric field: that is, the charge moves in a directional direction according to a certain rate, and the electric field where the charge is located at this time is a constant electric field.

Constant electric field. A constant electric field is an electric field formed by the joint excitation of the charges on the two poles of the power supply in a closed loop and the charges accumulated on the wires and other electrical components, which are characterized by electric field lines.

Everywhere along the direction of the conductor, since the distribution of charges is stable (i.e., a state of dynamic equilibrium is reached), the electric field formed by this stable distribution of charges is called a constant electric field.

Electrostatic field. Electrostatic field, which refers to the observer.

The electric field observed when at rest relative to a charge whose amount of charge does not change with time. It is a special form of matter that exists in the space around the electric charge, and its basic characteristic is that it has a strong effect on the stationary charge placed in it, Coulomb's law.

This force is described.

Electrostatic induction. When a charged object approaches an uncharged conductor, the charges inside the conductor are redistributed due to the interaction between the charges, and the dissimilar charge is attracted to the vicinity of the charged body, while the same charge is repelled to the other end of the conductor away from the charged body. This phenomenon was developed by the British scientist John Canton and Sweden.

Scientist Johann Carl Wilk discovered it in 1753 and 1762.

The electrostatic field is similar to the gravitational field and has two properties: one is from the perspective of force: the charge placed in the electrostatic field will experience an electrostatic force.

action, similar to the fact that an object placed near the earth must be cleared by the earth's gravity; The other is from the perspective of energy: it is the charge placed in the electrostatic field that has electric potential energy, similar to the gravitational potential energy of an object near the earth at a certain altitude.

Therefore, the answer to the world is: electrostatic force; Electric potential energy.

The common denominator: both can be used to generate force on charge.

Differences: 1. Different properties: the induced electric field is generated due to the changing magnetic field, and the curl is not zero, that is, the electric field lines of the induced electric field are closed, the electrostatic field is generated by the excitation of the electric charge, and the curl is zero, that is, the electric field lines of the electrostatic field are not closed.

2. Different functions: the electrostatic field is a special form of substance that exists in the space around the charge, and its basic characteristics are a strong effect on the stationary charge placed in it. The induced electric field exerts force on the charged particles in it.

3. Different characteristics: the essence of the vortex electric field force is a component of the Lorentz force, and the vortex electric field line is this force line. The vortex electric field is an equivalent electric field, and it is not real. The electric field lines of the electrostatic field start from a positive charge or infinity.

1 There are no points with equal field strength in the electric field formed by the point charge, but there are two points with equal potential... That's right. The field strength is a vector quantity, which is distributed in a "sunlight-like" space, so there is no exact same field strength point. The electric potential is scalar, and the points on the "sphere" are all equipotential.

2 The positive charge must move from a high potential to a low potential only under the action of the electric field force... Wrong. When the initial velocity is not 0, it can move in the opposite direction.

3. A positive charge with zero initial velocity must move along the electric field line under the action of the electric field force... Wrong. It should be said "only under the action of the electric field force".

The properties of the electrostatic field are as follows:

1.The electric field strength varies with the charge distribution. Both the magnitude and direction of the electric field strength are related to the nature and number of charges.

2.The electrostatic field is a vector field with the principle of scalar superposition. If there are multiple charges, then the electrostatic field generated by these charges can act directly superimposed on the same point.

3.The electrostatic field obeys Coulomb's law, which states that the strength of the electric field between two charges is inversely proportional to the square of the size and distance of the charge.

4.The electric field lines in the electrostatic field flow from a positive charge to a negative charge, and their density is proportional to the strength of the electric field. At the same time, the electric field lines also have information that reflects the strength and direction of the electric field.

5.The potential difference in an electrostatic field refers to the potential difference between two points and is a physical quantity used to describe the energy of an electric field. The potential difference between the two points of the fiber deficiency is equal to the result of the integration of the electric field between the two points along an arbitrary path.

6.The energy of the electric field in the electrostatic field is generated by the interaction of the charge and the electric field. When the charge distribution changes, so does the electrostatic field energy.

Further information is as follows:

The electrostatic field is the electric field observed by the observer when the charge is at rest relative to a charge whose amount of charge does not change with time. It is a special form of matter that exists in the space around the charge, and its basic characteristic is the powerful action on the source of the stationary charge placed in it, which is described by Coulomb's law.

According to Gauss's theorem of electrostatic field: the electric field lines of the electrostatic field start from a positive charge or infinity and end at a negative charge or infinity, so the electrostatic field is an active field. According to the Ampere loop theorem, it is an imitation vortomy field without volcanic permeability.

According to the ring theorem, the ring in the electrostatic field is constant equal to zero, which indicates that the work done by the electric field force is zero when the charge moves along an arbitrary closed path in the electrostatic field, so the electrostatic field is a conservative field.

According to Coulomb's law, the force between two point charges is proportional to the product of their charge and inversely proportional to the square of their distance, and the direction of the force is on their line.

i.e. f=(k·q1q2) r2; where Q1 and Q2 are the charges of the two charges (excluding positivity and negativity), and k are the electrostatic force constants, which are about; ), r is the distance from the line connecting the center points of the two charges. Note that the point charge is a charged body regardless of its size, shape, and charge distribution.

It is an idealized model of an actual charged body. When the distance of the charged bodies is much greater than their size, the shape and size of the charged bodies are negligible point charges.

The electric field is a special kind of pre-Changxiao substance that exists in the space around the electric charge and the changing magnetic field. This kind of substance is different from ordinary matter, although it is not composed of molecules and atoms, it is a special substance that exists objectively, and has objective properties such as force and energy that ordinary matter has.

The nature of the force of the electric field is manifested as follows: the electric field has a force acting on the charge placed in it, and this force is called the electric field force. The energy property of the electric field is manifested as follows: when the charge moves in the electric field, the electric field force does work on the charge, indicating that the electric field has energy.

The electrostatic field is an electric field excited by a stationary charge. This stationary charge is known as the field source charge, which is simply called the source charge. The electric field lines of an electrostatic field start at positive or infinity and end at infinity or negative charge.

The direction of the electric field line of the electrostatic field is closely related to the field source charge. When the source charge is positive, the electric field lines of the electric field are divergent; When the field source charge is negative, the electric field lines of the electric field are convergent. The work done by the electric field force moving the charge has the characteristic of being path-independent.

The energy properties of an electric field are described with a potential difference, or the distribution of the electric potential of an electric field is visualized with an equipotential surface.

The formula for the strength of the electric field in the electrostatic field is: e=f q. The unit is Newton per coulomb and the symbol is n c. Another unit is volts per meter (v m), and the relationship between the two units is 1n c = 1v m.

An electric field excited by a stationary charge (as opposed to the stationary charge of the observer) is called an electrostatic field.

According to Gauss's theorem of the electrostatic field, the electric field lines of the electrostatic field start from a positive charge and end with a negative charge, or from infinity to infinity, so the electrostatic field is an active field It is a spin-free field from the Ampere loop theorem According to the ring theorem, the ring in the electrostatic field is always equal to zero, indicating that the work done by the electric field is zero when the charge moves along any closed path in the electrostatic field, because the belief calls this electrostatic field a conservative field

According to Coulomb's law, the force between two point charges is proportional to the product of their charge and inversely proportional to the square of their distance, and the direction of the force is on their line, i.e., f kq1q2 r2, k is the constant electrostatic force, about 9 10 9 Nm 2 Ku2

Note that point charges are charges that are negligible in shape and size when the distance of the charged bodies is much greater than their size

First of all, the electrostatic field is a substance, and its existence is as real as the chair we sit on. And it is invisible and intangible, and people perceive it only by the force received by the charged body in the electrostatic field, just as light can only be perceived by the eyes and not through the nose.