What is Voltage, Current & Resistance?

Here we will explore the basic concepts of electricity, voltage, current, and electrical resistance.

Electricity is a form of energy resulting from the movement of charged particles, such as electrons. It can be found in nature, for example in lightning strikes, but it's also harnessed and used in a variety of man-made devices, from light bulbs to smartphones.

Voltage, or electric potential difference, is the measure of how much electrical energy is carried per unit of electric charge. It's often described as the "pressure" that pushes electrical current through a circuit. Voltage is measured in volts (V).

Current, on the other hand, refers to the flow of electrical charge in a circuit. It's measured in amperes (A) and it's often described as the "rate" at which electricity flows through a circuit. Electrical current is what powers electrical devices and it's essential for any electrical system to function.

Finally, we have electrical resistance, which is the measure of how much an object or material opposes the flow of electrical current through it. Resistance is measured in ohms (Ω) and it determines how much voltage is needed to produce a certain amount of current. Resistors are used in electronic circuits to control the flow of current and to reduce the amount of energy that's dissipated as heat.

Understanding these basic concepts of electricity, voltage, current, and electrical resistance can help you to better understand the inner workings of electronic devices and electrical systems. We hope this short video has been informative and helpful!

[reu.mathematicsacademy]

You really helped me so much especially during my campus times

[tyberiussear]

We love this teacher!!!! Your knowledge echos.

[alfredob]

We appreciate the extremely valuable content.

[naderhumood]

Appreciate your effort, thanks v much

[arshidwani]

I am trying to understand current.Hopefully, the second watching in the evening shall make things more clear.

[runzheyang]

Maybe we could try to think of it in another way, you can imagine there is a mountain with higher levels and lower levels, and the water is flowing, the water can only flow from a higher place to a lower place, and for the current is a bit like the water, it could only flow from higher voltage to lower voltage, so you can imagine the circuit is like a mountain, voltage as the level and current as the water.

[Ma_X]

It's closed but not always. Antennas!

[rome]

I thought free electrons pulsated not flowed

[MosaidDeath]

I know there has to be a closed loop, but WHY does there have to be a closed loop? Why can’t the electrons just fly out into the air, like in the water hose analogy?

[jamescunningham]

Can you teach my electrical class pls 🙏 😅