How to distinguish voltage (voltage) and current (amperes) of electricity
There are several problems in understanding electrical science. And the most important problem is about calculating and differentiating between electrical units. There are many units of electricity, but what we often hear includes voltage (volts), current (amperes), power (watts), resistance (ohms), and frequency (Hz).
Usually, these units are listed in a description table on electronic and electric devices. For example on a water pump which always shows voltage, current, electric power, and frequency as well as specifications for suction power, thrust, and water discharge.
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And, sometimes we as users of electrical energy must have felt confused about the difference between electric voltage and electric current. Usually, we think of 220V as an electric current even though it is a voltage.
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Therefore, it would be important if the discussion of this electrical problem could be described so that it could clear up confusion. At the same time adding insight and not getting lost anymore to place unit V and unit A and maybe other units such as the Watt unit.
The first thing that can be done is to compare the definitions of the two units based on the most credible information gathering place in cyberspace today, namely wikipedia.org
Definition
According to wikipedia.org, the electric voltage is the difference in electric potential between two points in volts (as previously explained). This quantity measures the potential energy of an electric field that results in an electric current in an electric conduit.
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Depending on the difference in electric potential. An electric voltage can be said to be extra low, low, high to extra high. By definition, voltage causes objects with a negative electric charge to be attracted from a low-voltage place to a higher-voltage place. So that the direction of conventional electric current in the conductor flows from high voltage to low voltage.
Meanwhile, according to wikipedia.org, electric current is the amount of electric charge caused by the movement of electrons, flowing through a point in the circuit per unit of time. Electric current can be measured in coulombs / second and amperes.
Examples of electric currents in everyday life range from very weak in units
MicroAmpere such as in body tissues, up to kilo amperes to mega amperes like what happened to Lightning.
In most direct current (DC) circuits it can be assumed that the resistance to electric current is constant so that the amount of current flowing in the circuit depends on the volts and resistance according to Ohm’s law.
Simple analogy
How to analogize voltage? In simple terms, an electronic circuit is analogous to the flow of water in a pipe driven by a water pump. The difference in water pressure from one point near the pump and another point at the end of the pipe can be analogized to the difference in electric potential which is interpreted as an electric voltage.
If the pump starts working, the water pressure in the pipe at a point near the pump becomes higher so that the water in the pipe starts being pushed from one point (well) to another point (the reservoir). This movement of water is capable of doing work, for example, turning a turbine. Likewise in an electrical circuit that does business, for example turning an electric motor or lighting.
Meanwhile, the current is analogous to the collection of water contained in a pump piping system described above. From one point to another. The amount of water will remain stationary unless there is the pressure that pushes or sucks the water which is analogized to the pressure as tension. The size of the pipe will affect the amount of water.
Another difference between current and power can also be seen in how to measure it.
The measuring instrument used to measure voltage is called a voltmeter, and the measuring instrument used to measure current is called an ampere meter. The Avo meter / multimeter can measure both because the Avometer contains the Voltmeter and the ampere meter on one measuring instrument, but still, on the multimeter, the mode selector between measuring current and measuring voltage is differentiated.
Application of voltage and current in everyday life
Voltage is usually located and generated by current sources such as batteries, batteries, generators, and other power plants if the electric power supply is supplied through airlines with a voltage between 380V and 1000KV to consumers.
Before heading to residential consumers, the voltage was lowered to 220V. Therefore, in general, the electricity in our homes ranges from 200V-240V. no need to recalculate because indeed the general calculation of AC voltage in our homes is 200V-240V.
In contrast to the voltage generated from electrical energy sources, electric currents are generated by electric loads such as lighting and electric motors such as water pumps.