The problem of potential difference and voltage, what is potential difference, and what is the relat

Not the force potential difference is numerically equal to the work done by the electric field force when the unit positive charge moves from one point to another.

Since a numerical value is work, it is a scalar quantity

The potential difference is the difference between two points

And the absolute value of the potential difference is the voltage

To put it bluntly, it's voltage.

The potential difference is positive and negative

It is used to indicate which point has a high voltage and which point has a low voltage (here you understand it for the time being) in the addition of voltage, and the power supply is connected in series here

Potential Difference Open Categories: Physical, Circuits.

1.Definition: The potential difference refers to the difference in the electric potential between two points in the electric field, also called voltage, which is represented by the letter u.

2.Formula: UAB a b

3.Unit: In the International System of Units, the unit of potential difference is volts, referred to as volts, and the symbol bank charge moves from one point in the electric field to another, and if the electric field force does 1 joule of work, the potential difference between the two points is 1 volt.

4。Physical Significance:

When the charge q moves from one point A to another point B in the electric field, the ratio of the work done by the electric field force to the amount of charge is called the potential difference between points A and B. The relation is.

uab=wab/q

5.Relationship with electric field strength:

u ed (the difference in potential between two points in a uniform electric field is equal to the strength of the electric field multiplied by the distance between the two points in the direction of the field strength).

Adding voltage between xx means using an external power supply or other means to make the potential difference (i.e., voltage) between xx a specific value.

Potential difference = voltage is the energy and gravity compared to the gravitational potential energy and gravity The key is to set the 0 potential point 10 meters high object (relative to the ground) Now let the 0 potential point be 5 meters (relative to the ground) then he has the gravitational potential energy = 50j

Potential difference numerically = voltage.

The formula for the relationship between voltage and charge: UAB = WAB Q

Definition of potential difference (voltage difference):

The ratio of the work of the electric field force made by the electric field Wab to the charge Q is called the potential difference between the two points of AB (the difference of the electric potential between the two points of AB, also known as the potential difference), which is expressed by UAB and the formula: UAB = WAB Q

where WAB is the work done by the electric field force rubber group and Q is the amount of electric charge.

Potential difference is a physical quantity that describes the difference in electric potential energy between two points in an electric field, usually represented by the letter δv. It represents the change in potential energy produced by a charge from one point to another under the action of an electric field force.

Voltage is another term for potential difference, which refers to the potential difference between two nodes in a circuit. The unit of voltage is volts (V) and 1V is equal to the work done by the electric field force to move 1 coulomb charge by 1 meter.

Electric charge is a fundamental physical quantity in electronics, denoted by the letter Q, and its unit is coulomb (c). The amount of electricity is the basis of electric current and the basic unit of charge.

There is a certain relationship between the potential difference, voltage, and electricity:

1.The potential difference is equal to the work done by a unit charge under the action of an electric field force. i.e. δv = w q, where δv denotes the potential difference, w denotes the change in electric potential energy (i.e., work), and q denotes the electric charge.

This relationship can be understood as: the potential difference is the energy per unit of electricity.

2.Voltage can be understood as the amount of energy gained or dissipated per unit of electricity as it passes through a circuit element. In an electrical circuit, the power supply provides a potential difference that allows the charge to flow through the circuit and complete the electrical energy conversion. Therefore, voltage can be thought of as providing electrical energy or potential difference.

3.Electricity refers to the number of charges and is the basis of electric current. The current is equal to the amount of charge that the stool passes through a certain cross-section per unit time. The greater the value of the charge per unit of time, the greater the current.

Voltage and potential difference are two common concepts in electricity, and their differences and connections are as follows:

1.Definitions:

The potential difference (voltage difference) refers to the potential difference that exists between two points, i.e., the difference in energy required for a unit charge to move between two locations. It is a commonly used physical quantity used to measure the strength of an electric field.

The electric potential difference is a standard physical quantity that is usually measured in "volts (v)".

2.Physical Significance:

Both the potential difference and the voltage represent the charge distribution or charge flow information that exists between two ends of a circuit or electrical device.

Voltage usually represents the potential difference provided by the power supply, which can be understood as the driving force of the current, and the pressure difference applied to a circuit such as the movement of the charge from a low potential to a high potential.

The potential difference represents the change in energy from point A to point B in the direction of an electric field. For example, when a charge passes through a resistor or other electronic device, an energy change and voltage drop occurs, which can be described as a potential difference.

3.Calculation method:

The voltage can be measured by an electrical instrument such as a voltmeter.

The potential difference is calculated by adding the potential difference between the observed position and the electric field reference point to obtain the potential difference between the two positions. This method has been used in many complex circuits and electric fields.

4.Applications:

Voltage plays a vital role in the design of many electrical equipment, and has a wide range of applications in the fields of television, computers, telecommunication systems, aerospace and so on.

The potential difference is closely related to voltage, and is also involved in many physical processes such as power conversion and transmission, thermal energy control, optical component manufacturing, etc., and has a great impact on the performance and stability of electronic products such as lasers, LED lights, and batteries.

In summary, the fundamental difference between voltage and potential difference lies in their specific definition and expression, but from a physical point of view, there are some connections between the two. Voltage mainly describes the dynamic change of charge between adjacent points in a circuit, while potential difference mainly describes the change in potential energy that a charge undergoes as it moves in an electrostatic field.

There is no difference, the voltage is the potential difference. Voltage, also known as potential difference or potential difference, is a physical quantity that measures the difference in energy between a unit charge in an electrostatic field due to different potentials. The magnitude of the voltage from one point to another is equal to the work done by the unit positive charge to move from one point to another due to the action of the electric field force, and the direction of the voltage is specified as the direction from the high potential to the low potential.

Voltage can be divided into high voltage, low voltage and safety voltage.

The difference between high and low voltage is based on the voltage value of the electrical equipment to the ground. The voltage to the ground is higher than or equal to 1000 volts. The voltage to the ground is less than 1000 volts.

Among them, the safe voltage refers to the voltage that the human body is exposed to for a long time without the risk of electric shock. According to the national standard "GB3805-83" safety voltage, the voltage series used to prevent electric shock accidents and supplied by a specific power supply is specified. China stipulates the following five levels for power frequency safety voltage, namely 42V, 36V, 24V, 12V and 6V.

Explanation of the potential difference.

The difference in electric potential between two points in a charged body or conductor in a circuit. The unit of potential difference is volts. It is also called potential difference, voltage.

Decomposition of Words Explanation of Electricity Electricity (electricity) à a physical phenomenon, an energy that can be obtained by chemical or physical methods to make a lamp glow, mechanically turn, etc.: electricity. Electrical energy.

Electric heating. Sensitive Radio. On a rainy day, the light of the notice is emitted when the clouds in the sky discharge the bridge Yuyuan:

Lightning. Thunder. Refers to the telegram:

Power. Message. Refers to telegrams: telegram invitations.

A physical quantity with the same unit in physics.

All have the same physical nature, hence the voltage and potential difference.

It is indeed the same in nature, and it is also said in your question that the hands are exactly the same, that is, their essence is the same, as for the different mushu, many of them are different in usage and occasions, in addition, many situations have their particularities, which cannot be understood by the usual theory, and can only be understood after a certain amount of knowledge accumulation. There was a mistake in that book. It will be electromotive.

and the concept of potential difference is confused. Ohm's law hole width for closed loops.

The formula is e = u + IR This formula means that the electromotive force of the power supply is consumed by two aspects, one is the voltage at the end of the road (that is, the potential difference between the two ends of the power supply) U, and the other is the voltage ir consumed on the internal resistance, and the sum of these two parts is the electromotive force of the power supply. So the e in this formula is definitely not the potential difference, but the electromotive force! Electromotive force and potential difference (voltage) are the two concepts that are most likely to be confused.

Electromotive force is the expression of: [Non-electrostatic force.]

Put the unit positive charge.

The work done to move from the negative electrode to the positive electrode through the inside of the power supply. The potential difference is the work done by [electrostatic force] to move a unit of positive charge from one point in the electric field through an arbitrary path to another, and they are two completely different concepts.

That is to say, the electromotive force is the non-electrostatic force to overcome the internal resistance to do work, and there is still a surplus after overcoming the internal resistance to do work, the remaining work is the road-end voltage U, and from the measurement point of view, this U is the potential difference between the two ends of the measured power supply (that is, the road-end voltage).

The area table of the potential difference and voltage of the electric imitation seems to be relatively large, after all, the potential difference and the voltage are on in the case of a discuss, and it has a certain relationship. Omen.

The potential difference between two points in an electric field is called the potential difference. Sometimes it's called voltage. The electric potential sum and the potential difference are physical quantities that are closely related to the potential field, the so-called conservative force field.

In the potential electrostatic first containing field and the steady electric field, the potential difference between any two points is equal to the work done by the electric field force to move the unit positive charge from one point of the electric field to another point along any path, and the voltage between the two points is the potential difference between the two points, and is determined by the position of the two points.

Potential difference = voltage.

Electric potential difference = the difference between the electric potential chains of two points in the electric field.

The potential difference is absolute.

The electric potential is the right thing to do with the sails.