How voltages are formed in circuits

Voltage. As we all know, the reason why water can flow in the pipe is because there is a pressure caused by the difference between the high and low water levels, so that the water can flow from high to low. The tap water used in the city can flow out of the pipe as soon as the water gate is opened, because the water storage tower is higher than the ground, or because the pressure difference caused by the water pump.

The same is true of electricity, which is able to flow in the wire, also because there is a difference between high and low potential. This difference is called the potential difference, also known as the voltage. In other words.

In a circuit, the potential difference between any two points is called the voltage at those 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.

High voltages can be expressed in kilovolts (kv) and low voltages can be expressed in millivolts (mv).

The conversion relationship between them is:

1 kilovolt (kv) = 1000 volts (v).

1 volt (V) = 1000 millivolts (mV).

When current flows through an electrical component with a resistance value, a voltage is generated at both ends of the element.

Voltage, also known as potential difference, refers to the difference in electric potential generated by the difference in electric field between two points in space. The magnitude of the electric field is directly proportional to the magnitude of the charge and inversely proportional to the square of the distance, and the subtraction of the electric potential between two points is the electric potential, which is referred to as voltage.

When the circuit is complete and there is a power supply, a voltage is formed.

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. Its magnitude is equal to the work done by a unit positive charge to move from point A to point B due to the action of an 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. In accordance with the national standard "GB3805-83", the safety voltage of potatoes stipulates the voltage series powered by a specific power supply in order to prevent electric shock accidents in skillful hands. China stipulates the following five levels for power frequency safety voltage, namely 42V, 36V, 24V, 12V and 6V.

1. The formation of voltage is due to the potential difference in the current. The voltage is the difference between the positive and negative poles of the power supply, the positive electrode gathers excess positive charge, and the negative pole gathers excess negative charge, and the difference between the positive and negative poles is called voltage.

2. Voltage is the reason for the directional movement of the charge to form the current. The reason why the current is able to flow in the early lead of the wire is also because there is a difference between the high and low potential in the current. This difference is called the potential difference, also known as the voltage.

In other words. In a circuit, the potential difference between any two points is called the voltage at those two points. The letter u is usually used to represent voltage.

3. The voltage law of the series circuit: the total voltage at both ends of the series circuit is equal to the sum of the voltages at both ends of the circuit of each part. Parallel circuit voltage law: The voltage at both ends of each branch of the parallel circuit is equal and equal to the power supply voltage.

4. Voltage can be divided into high voltage, low voltage and safe 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 ground voltage is less than 1000 volts, and the voltage is low.

The function of the voltage is to make the free charge of the wild Nenga move in the direction of the high surplus of the circuit to form an electric current

So the answer is: to make the free charge move in a directional way in the circuit