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SIMPLIFIED: "What is the Difference Between Voltage and Current?"

Aug 24
2 min read

Note: The above image was taken from the original article.
Note: The above image was taken from the original article.

The article linked above talks about the difference between voltage and current, which is an important concept to understand if you want to go into electrical engineering. Voltage and current are, in my opinion, two of the most important concepts when learning about electricity.

I’ll start with voltage. The unit for voltage is the volt, which is denoted as V. Voltage can be defined like this: if there are two points, voltage is the electric potential difference between those same two points. Voltage is what pushes electrons through a circuit. The example that many teachers and sources use on the internet is a water pipe. Voltage is like water pressure, which is what causes water to actually move through the pipe.

Current is different because it is the physical flow of electrons. The unit for current is an amperes, which is usually called an amp and denoted as A. If you use the same water pipe analogy, current is the AMOUNT of water passing through the pipe, and this water is passing through the pipe because of the voltage. 

I have simplified an article under the physics tab that relates these two variables together. That equation is called Ohm’s Law, and it is V = I times R, where R is resistance, I is current, and V is voltage. If you want to learn more about Ohm’s Law in a physics setting, go check out that simplified article. Ultimately, voltage and current are both involved in electric circuits that help power electrical devices like batteries, phones, computers, and even motors, which is why these ideas are important for electrical engineering. 


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