How is the intensity of electric current calculated?nada shaban
Electric current is the movement of electrical charges in a conductive section because they move from the high voltage area to the low voltage area. The ammeter is a unit of measurement for electric current. Electric current can be obtained from multiple sources. These sources are natural sources such as lightning, thunder, wind, and there are Materials that move regularly to transmit electrical current
These materials are divided into two parts: they are the conductive materials that allow electrical charges to pass through them, such as copper wires, and there are the insulating materials, which are the materials that allow electrical charges to pass through the ebonite rod.
Calculating the intensity of the electric current: The intensity of the electric current is calculated using an ammeter device , where the ammeter is connected to the elements of the electrical circuit. When the ammeter is connected to the battery, the poles are connected to the appropriate places for it, where the positive is connected to the positive and the negative to the negative, and when this device called the ammeter By measuring the intensity of the electric current, the ammeter pointer indicates the number vertically, so mathematical science can be used to calculate the intensity of the electric current.
The importance of electricity:
- First, electricity enables us to obtain lighting used in all societies.
- Secondly, electricity is used to operate many electrical devices that help communities communicate with each other, such as computers and Internet devices.
- Third: Electricity can be used for heating and cooling.
- Fourth: Electricity is used to operate important means of transportation, such as the metro, which relies entirely on electricity to operate, as well as cars and airplanes that use electric motors.
- Fifth: Electricity is used in medical fields by operating modern medical devices.
Electric current and its dangers:
If the electric current is not handled properly, it will be considered a source of danger, and one of the most dangerous risks that a person may be exposed to when using electric current is electric shock. When the electric current is circulated in the human body, it will lead to severe burns and cardiac arrest if the electrical charges are received incorrectly. Large to the heart, and the severity of the shock can vary on the body depending on the electrical current, and the electrical current is responsible for causing various fires, such as fires that result from electrical cables.
Therefore, a person must be careful and cautious when dealing with electrical current sources. He must not touch open cables and not place most of the device in one cable so that it does not get burned. The wires must be raised from the ground so that they are not within everyone’s reach as they should be. Dispose of dead batteries immediately after they are finished because they become toxic when they are empty.
Effects of electric current:
. Electric current cannot be seen with the naked eye, but its existence is inferred from its effects. These effects are:
First… the magnetic effect.
Secondly: The thermal effect.
Third: The chemical effect.
Fourth: The optical effect.