Tiếng ViệtWhen using electricity, we often look at the parameters and care about the voltage (voltage) and capacity of that device, but we forget that there is also an important quantity that is current. Current, also known as amperage, is a quantity with voltage that creates energy for the electrical system to help electric equipment and tools work. The direction of the current represents the direction of energy movement as well as the direction of the voltage energy. What is electric current? In this post, we will help you know clearly the conditions for having a current and what is the conventional current direction of the current and the effect of the current.
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Contents
What is electric current? The condition for current is gfi and the current direction convention
What is electric current?
What is electric current? Electric current is the displacement of charged particles, the current generated by the movement of electrons along a conductor. Current flows in the direction from a place of high potential to a place of low potential, while electrons flow in the opposite direction of current from a place of low potential to a place of high voltage.
TTTT current directly affects the energy of the power source, current and voltage are the two main quantities that determine the capacity of that device and system. ElectricTTTT current is the core of electricity.
What is the current condition and what is the current direction convention?
The condition for current is that as long as the potential difference between two conductors is maintained, the current is maintained. Electric current is caused by the motion of charge carriers moving into electrical conductors. The current flowing between two potentials is always equal when connected in series and equal to the sum of the branches when connected in parallel.
Conventional current direction is that the current is passed from the anode where the voltage is high through the electrical equipment and then to the cathode where the voltage is low. The current in the series circuit will flow in a straight line and in the parallel circuit will divide the small currents inside.
Amperage and amperage unit
Amperage is a quantity representing the strength and weakness of an electric current. The greater the amperage of the generator motor, the stronger the current flows, the smaller the amperage, the weaker the current flows.. The larger the amperage, the stronger the current flows, the smaller the amperage, the weaker the current flows. Amperage and current are directly proportional to each other.
The amperage unit is I and the unit is A (Ampere). In addition, when talking about amperage, people also use the unit of mA (milli Amp) known as 1000 mA = 1A, the unit of milliAmpe is used a lot in electronic circuits and circuits with small amperage. more than 1A.
State the effect of electric current
Current in practice has many different effects, but the main effects of current include the following:
- Photoelectric effect: Electricity can be converted into optical energy such as lighting lamps of all kinds, this is a commonly used application of photovoltaic energy.
- Thermal effect: Electricity is converted into heat to provide temperature for appliances such as rice cookers, irons, kettles, etc.
- Magnetic effect: Electricity is converted into magnetic or mechanical energy to rotate a certain device, the application is magnets, magnetic pumps, …
- Biological effects: When electricity enters the body of a person or object, it will affect different organs and apply it to treat specific diseases.
- Chemical action: Electricity creates the contraction effect of chemical substances applied in electrolysis, copper reacting,….
State the effect of electric current as optical effect, thermal effect, magnetic effect, biological effect, chemical effect.
See more: Functions of power protection relays.
DC current, what is ac current and what is dc current?
What is DC current, dc current?
Direct current is the unidirectional movement of areas, direct current generated by batteries, accumulators or solar cells. DC current has a charge moving in one direction from the positive terminal of the power supply to the positive terminal of the power supply.
What is dc current? DC current is also abbreviated direct current. dc current stands for Direct Current.
What is ac current?
What is ac current? AC current is alternating current, amperage and direction of AC current will be changed according to a cyclic cycle. That is, the direction of the current will go from positive to negative and then reverse from negative to positive.
See more: Current protection relay and basic functions.
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