About the change in the work done and the electric potential of the electric field force

You should know that the electric potential decreases gradually with the direction of the electric field lines.

If the source charge is positive, then the direction of the electric field lines it produces is outward. The same kind of charge repels each other, so if there is a positive charge on the electric field line produced by the source charge, the positive charge is moving in the direction of the electric field line and away from the source charge. The electric field is good for doing positive work.

So its electric potential decreases. When doing negative work, it moves against the direction of the electric field line, close to the source charge. So the electric potential increases.

On the other hand, the negative charges, the dissimilar charges attract, move against the direction of the electric field line, and get closer to the source charge. So the electric potential increases. The electric field force also does positive work. Negative work moves in the direction of the electric field line, away from the source charge. Electric potential is reduced.

The same is true for assuming that the source charge is negative.

From the energy point of view, regardless of the positive charge or negative charge, the electric field force does positive work, the electric potential energy must decrease, and the negative work potential energy must increase.

Electric potential energy is the product of the charge and the electric potential, so for the positive charge, the electric field force does positive work, the electric potential decreases, and the negative work potential increases.

Whereas, for a negative charge, due to its sign of charge, the electric field force does positive work, the electric potential increases, and the negative work potential decreases.

In fact, all the principles of the field are the same, let's take a familiar example. For example, in a gravitational field, when an object is at a certain height, when it moves downward, gravity does positive work, and the gravitational potential energy decreases; When he moves upwards, gravity does negative work, and the gravitational potential energy increases.

Now in the electric field, replace "gravity" with "electric field force", "height" becomes "electric potential", and "gravitational potential energy" becomes "electric potential energy", and this sentence is equally true. You can imagine the motion scene in the gravitational field to simulate the situation of the electric charge in the electric field, draw the electric field lines and the positive and negative charges, I believe you can understand it at one point.

The positive work potential energy of the electric field force decreases, and the negative work potential energy of the electric field force increases.

Expression: wab=epa-epb=- ep

When WAB is positive, EPA > EPB, indicating that the electrostatic force does positive work and the potential energy decreases. When the WAB is negative, the EPA is supplemented:

1) Characteristics of work done by electrostatic force: when moving the charge in a uniform electric field, the work done by the electrostatic force is related to the starting position and end position of the charge, and has nothing to do with the path through which the charge passes.

2) The work done by the electrostatic force can only determine the amount of change in the electric potential energy, but not the value of the electric potential energy at a certain point in the electric field. The potential energy of a charge at other points in the electric field can only be determined by first specifying the potential energy at a point in the electric field as 0. It is usually specified that the electric potential energy of the charge at infinity away from the field source charge is 0 or 0 at the surface of the earth.

When the electric field force does positive work, the electric potential energy decreases, and conversely, when the electric field force does negative work, the electric potential energy increases.

The electric potential decreases along the electric field line, the potential energy of the positive charge decreases along the electric field line, and the potential energy of the negative charge increases along the electric field line.

When a positive charge is moved, the potential energy and the electric potential change simultaneously, while when a negative charge is moved, the potential energy and the electric potential change in inversion. In electrostatics, electric potential energy is actually a kind of potential energy of the charge distribution in the electric field, which is related to a configuration of the charge distribution within the system.

The unit of electric potential energy is joules. The electric potential energy ep=q , i.e., the electric potential energy is equal to the product of the charge and the electric potential.

The relationship between the electric field force and the electric potential energy is positive work, the electric potential energy decreases, the electric field force does negative work, and the electric potential energy increases. In the case where only the electric field force does the work, the electric potential energy and kinetic energy of the charged particles are converted into each other, and the kinetic energy increases as much as the potential energy decreases, and the total amount of energy remains the same.

The power bureau has no spring power.

When doing positive work, the electric potential energy decreases, and vice versa, the electric potential energy increases.

The electric potential decreases in the direction of the electric field line.

Positive charge. The electric potential energy decreases along the direction of the electric field line.

The potential energy of the negative charge increases along the direction of the electric field line.

Moving a positive charge, the potential energy and the electric potential change synchronously.

Moving a negative charge, the potential energy and the potential change in reversal.

The relationship between the work done by the electric field difference and the change in electric potential energy is briefly described as follows:

When the positive electric pirate brother brother moves in the electric field, the electric field force does positive work, and the electric potential energy decreases. Since Q>0, the potential decreases (from high to low).

The positive charge moves in the electric field, and the electric field force does negative work, then the electric potential energy increases. Since Q>0, the potential increases (from low to high).

The negative charge moves in the electric field, and the electric field force does positive work, then the electric potential energy decreases. Since the q negative charge moves in the electric field, the electric field force does negative work, then the electric potential energy increases. Since the work done by the electric field force in q is closely related to the electric potential energy, just like the relationship between the work done by gravity and the gravitational potential energy of the object, the positive work done by the electric field force and the electric potential energy decrease, and the negative work done by the electric field force and the electric potential energy increases.

wabo, ep0, the electric field force does positive work, and the electric potential energy decreases and is converted into other forms of energy; wabo, ep0, the electric field force does negative work, and the electric combustion celebration potential energy increases the energy of other forms into electric potential energy.

The electric field force, the work done and the electric potential energy have their own characteristics

Characteristics of work done by electric field force: the formula of work done by electric field force wab=quab; The work done by the electric field force is only related to the charge charge, the potential difference between the two points, and not the path of motion.

Characteristics of electric potential energy: epq=qua; The electric potential energy of the charge is determined by the position of the charge in the electric field, which is related to the selection of 0 potential, the electric potential energy is relative, the change of electric potential energy is absolute, and the change of electric potential energy is equal to the work done by the electric field force.

1. The electric field force does positive work, and the electric potential energy decreases. The electric lead changes the field force to do negative work, and the electric potential energy increases. In electrostatics, electric potential energy is the potential energy of the charge distribution in an electric field, which is related to the configuration of the charge distribution within the system. The unit of electric potential energy is joules.

2. The interaction between the charges occurs through an electric field. As long as there is an electric charge, there is an electric field around the charge, and the basic property of the electric field is that it has a strong effect on the charge placed in it, and this force is called the electric field force.

3. The electric field has the properties of force and energy, and the physical quantities that describe the electric field include electric potential, electric potential energy, electrostatic force, electrostatic force work, etc., in order to better describe the electric field, there are also concepts such as electric field lines and equipotential surfaces, which can be judged from multiple angles.

4. Use electric field lines to judge the electric potential. The electric potential is getting lower and lower in the direction of the electric field lines. In the electric field produced by a positive charge, the closer you are to the charge, the higher the potential, and in the electric field produced by a negative charge, the closer you are to the charge, the lower the potential.

Positive or negative electric potential. If the electric potential at infinity is zero, then the potential of each point around the positive point charge is positive, and the potential of each point around the negative point charge is negative.