What is voltage, current, resistance, electron, potential, electrode potential, electromotive force,

Voltage: The difference between the potential between any two points in a circuit is called voltage.

Current: The flow of electrons formed by the directional movement of electrons in a circuit is called current.

Resistance: The property that hinders the flow of current in a circuit is called resistance.

Electromotive force. Inside the power supply, the power supply force separates the positive and negative charges and carries them to both ends of the power supply, which is the potential difference generated by the two ends of the power supply.

It's called electromotive force.

Voltage: The difference between the potential between any two points in a circuit is called voltage.

Current: The flow of electrons formed by the directional movement of electrons in a circuit is called current.

Resistance: The property that hinders the flow of current in a circuit is called resistance.

Electromotive force: The power supply force separates the positive and negative charges and transports them to both ends of the power supply, which is the potential difference between the two ends of the power supply called electromotive force.

Potential vs. voltage vs. electromotive force.

What are the similarities and differences?

The units of potential and voltage, and electromotive force are all volts.

The potential is only when the intensity factor of the theoretical ** electrical energy is the potential.

this concept. to be useful. Definition.

The potential at a certain point in space is to put a unit of positive charge.

From infinity.

Let's say the potential is zero here).

The amount of electrical energy consumed when brought to that point.

When the orange socks unit is positively demanding.

through a phase of matter.

a's phase interface, because in.

A has a surface at the phase interface.

Electric potential is an indefinite value, and the round denier excites a certain position in the phase of a substance.

Absolute. The potential cannot be determined.

Certainly, nor can it be measured.

The potential difference in a circuit caused by the conversion of energy into electrical energy in other forms.

Call. Do electromotive force. with letters. e

Indicates that the unit is volts.

In electrical circuits, electromotive force is commonly used.

Symbol. Denote.

Inside the power supply, there is no electrostatic force.

Transfer the unit positive charge from the negative electrode.

The work done when the positive pole is positive. Formula: e

wq (e is the electric potential energy).

Voltage is the potential difference between any two points in a circuit called the electricity at these two points.

Press. Voltage with a symbol.

u"Denote. The level of voltage is generally expressed in unit volts, referred to as volts, and is symbolized.

v"Denote. Voltage is used to indicate the level of electric potential and is also used in the table.

Shows the difference between the height and low of the electromotive force.

Difference between electromotive force and electric potential.

Voltage) are two concepts that are easily confused. The front has.

As mentioned above, electromotive force means that the non-electrostatic force moves the unit positive charge from the negative electrode through the inside of the power supply.

the work done to the positive pole;

The potential difference indicates that the electrostatic force removes the unit positive charge from the late electric field.

The work done by moving from one point to another.

They are two completely different concepts.

Electricity. Pressure is a unit used to express the strength of an electric potential.

Electromotive force: The work done by the non-electrostatic force to move the unit positive charge from the negative pole of the power supply to the positive pole. e=a/q

Defined from the perspective of work, it refers to the functional power of the power supply. In circuits, non-power supplies do not use this concept.

The potential is different depending on the selection of the reference point.

Voltage is the potential difference between two points in an electric field (or circuit). It is the work done by a unit positive charge when it moves between these two points in the electric field, and it is the ability to express the work done by the electric field force. The voltage is the direction in which the potential is directed from a high potential to an electric potential, that is, the potential drops.

The potential is the work done by the electric field force to move the unit positive charge from a point in the electric field to a reference point, and the more work there is, the higher the potential at that point. The potential is relative. Electromotive force is the ability to represent the non-electric field force (external force) to do or believe in the work of oranges, which is directed from a low potential to a high potential, that is, the direction of the electric potential rise.

The electromotive force is only present inside the power supply, whereas the voltage is not only present at both ends of the power supply but also outside the power supply. They are all measured in volts.

2. Electric potential: It is the ratio of the electric potential energy of a charge placed at a certain point in the electric field to the amount of its charge.

The formula is u=w q (w is the electric potential energy, q is the amount of charge, and u is the electric potential).

Electric potential and potential are actually the same concept.

3. Level: It is a parameter that indicates the relative magnitude of electrical quantities (voltage, current or electric power). When a certain value of an electrical quantity is specified as a standard value, other values can be compared with this standard value to obtain a relative magnitude value, which can be called the level value.

The level value is often expressed in the number of decibels, and the calculation formula is:

Level value = 10lg (given voltage or current or power Standard voltage or current or power) 4. Voltage: It is the cause of the formation of current in the circuit. The potential difference between the two points in the electric field, the high and low potential points, is the voltage.

The voltage between any two points in a circuit is equal to the difference between the potentials of these two points, so the voltage is also known as the potential difference.

Voltage is the potential difference or potential difference.

Both the conditional and standard electrode potentials are measured under certain conditions. Both of these are to obtain the electrode potential values of various electrodes, and the electrode potential of a certain electrode is used as a standard to form a battery with other electrodes to be measured, and the relative electrode potential e value of various different electrodes is determined by measuring the electromotive force of the battery.

The difference is that the conditions under which they occur are different, and the measurement methods are also different.

1. The conditions for occurrence are different. The conditional potential is the actual potential at the analyzed concentration of 1 mol per liter in both the oxidation and reduction states under certain conditions, while the standard electrode potential refers to the equilibrium potential measured at a temperature of 25 and an effective concentration of 1 mol l (i.e., activity of 1).

2. The results reflected are different. The conditional potential reflects the total result of the ionic strength and the influence of various side reactions, and the standard electrode potential can be used to determine the direction of the oxygen return reaction very simply.

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. This concept is similar to the "water pressure" caused by the high and low water level. It should be pointed out that the term "voltage" is generally only used in electrical circuits, while "potential difference" and "potential difference" are generally applied to all electrical phenomena.

The basis of voltage refers to the potential difference between two points A and B in the circuit (referred to as voltage), the magnitude of which is equal to the work done by the unit positive charge to move from point A to point B due to the action of the electric field force, and the direction of the electric deficit wide voltage is specified as the direction from high potential to low potential. The SI system of units for voltage is volts (V), and the commonly used units are millivolts (mv), microvolts (mv), kilovolts (kv), etc., DC voltage and AC voltage If the magnitude and direction of the voltage do not change with time, it is called steady voltage or constant voltage, referred to as DC voltage, represented by the capital letter U. If the magnitude and direction of the voltage change over time, it is called a fluctuating voltage.

For circuit analysis, one of the most important fluctuating voltages is the sinusoidal alternating current voltage (abbreviated as alternating voltage), which changes periodically in magnitude and direction according to the sinusoidal law over time. The instantaneous value of the AC voltage should be indicated by the voltaic bright lowercase letter u or u(t).

The electric potential is the electric potential, and the potential difference is sometimes called the potential difference.

Electric potential can be compared to the gravitational force potential You have learned gravitational potential energy, an object at a certain height, since it can be done by gravity, so it has a certain gravitational potential energy. The magnitude of gravitational potential energy is related to the mass and height of the object. But if we want to describe the gravitational potential energy at a certain location, we can divide the gravitational potential energy of the object at that location by the mass of the object to get an amount that is independent of the object.

This amount is only related to the position chosen by the destruction, which we can call the gravitational potential.

The same is true for the electric field, if you place a charge at a certain position in the electric field, and then choose a position with zero potential energy, and move the charge from this position to the position of zero potential energy, the electric field force will do work (both positive and negative work are possible), and the work done by the electric field force is the electric potential energy of the charge at that position. The ratio of the electric potential energy to the amount of charge is the electric potential at the point, which is only related to the position.

The potential difference is the difference in the potential between two points in the electric field, and it can be used to describe the change in energy of a charge moving from one point to another. The potential difference is also called voltage.

You may not understand why you can choose an infinite distance from a point charge as the zero potential energy surface and calculate the potential at a certain point. That's because the work done by the electric field force is finite to move the lift scale charge from a point to infinity. For example, the result obtained is infinitely close to 1, but it can never reach 1

I think the sum of this infinite sequence of numbers is 1The work of the electric field force is the same.

What are the similarities and differences between potential and voltage and electromotive force?

The units of potential and voltage, and electromotive force are all volts. （1

The concept of "potential" is only theoretically the intensity factor of electrical energy.

to be useful. Definition.

The potential at a point in space is to take the unit positive charge from infinity (assuming the potential is zero here).

The amount of electrical energy consumed when brought to that point.

When the unit is positively charged.

through a phase of matter.

a's phase interface, because in.

A has a surface at the phase interface.

The electric potential is indefinite, so the "absolute" potential at a certain position in the phase of a substance cannot be determined.

Certainly, nor can it be measured. （2

The potential difference in an electrical circuit caused by the conversion of energy into electrical energy in other forms is called electromotive force.

Represented by the letter e, the unit is volts.

In electrical circuits, electromotive force is commonly symbolized δ

Denote. Inside the power supply, the non-electrostatic force transfers the unit positive charge from the negative pole.

The work done when the positive pole is positive.

Formula: e w

q (e is the electric potential energy) (3

The voltage is the potential difference between any two points in a circuit called the voltage at these two points. Voltage with a symbol.

u"Denote. The level of voltage is generally expressed in unit volts, referred to as volts, and is symbolized.

v"Denote. Voltage is used to indicate the high and low of the electric potential and also to indicate the difference between the high and low electromotive force. （4

Electromotive force and potential difference (voltage) are two concepts that can be easily confused. As mentioned earlier, electromotive force is the work done by the non-electrostatic force to move the unit positive charge from the negative electrode to the positive electrode through the power supply;

The potential difference indicates that the electrostatic force removes the unit positive charge from the electric field.

The work done by moving from one point to another.

They are two completely different concepts.

Voltage is a unit used to express the strength of the electric potential.

When the external circuit of the power supply is disconnected, the voltage at both ends of the positive and negative poles of the power supply is equal to the electromotive force of the power supply. When the external circuit is turned on, the terminal voltage is less than the electromotive force due to the internal resistance. Whereas, potential is the voltage at one point in a circuit relative to another. The selected point is the zero potential point.

The so-called voltage, that is, the (two-point) voltage difference, is also the (two-point) potential difference, and also the (two-point) potential difference; The potential, i.e. the electric potential, is directed at a point (usually a point is selected as the point of zero potential); Electromotive force generally refers to the open-circuit voltage of the power supply (measured by a meter is equal to the circuit on, so it can only be obtained in theory).

Is the voltage between two points in a circuit the difference in potential between two points? The actual direction of the voltage is from the high voltage point to the low voltage point.