How do electrons flow in a basic electronic circuit?

[glenn101]

Hey guys, I'm going to university next year to complete a degree in electronics engineering and I'm hoping to get a head start.

Ok I've attempted to read several online materials to try and create a mental model of what occurs in an electronic circuit. Let's assume its a basic circuit with a battery, copper wires, and a load. And I'll also assume non-conventional current i.e. electron flow from negative to positive terminal inside battery. Ok so beginning from the battery, my first question arises, I've read that inside the battery there is an electric field directed from the negative to the positive terminal, is there a build up of electrons at the positive terminal of the battery to induce this field?

From there work is done on the electrons from the chemical reactions inside the battery to push electrons against this electric field gaining electric potential in the process, so once the electrons leave the positive terminal of the battery, is there another electric field created in the circuit to push the electrons around the circuit whilst reducing electric potential eventually returning to the negative terminal?

I'm assuming there is, if so, what is creating this electric field?

Thanks in advance

 

[vk6kro]

I've read that inside the battery there is an electric field directed from the negative to the positive terminal, is there a build up of electrons at the positive terminal of the battery to induce this field?

Where did you read that?

The electrons that flow out of a battery do not "bunch up" on the negative terminal.
Before you completed the external circuit, those electrons were spinning around Zinc atoms on the Zinc electrode of the battery.
The Zinc dissolves in the electrolyte to become Zn++, releasing two electrons.
At the positive terminal, there are a lot of Hydrogen ions that are able to use returning electrons to become Hydrogen gas.

The electrons do not actually move through the battery.

These reactions depend on the kind of battery it is, but the principle is the same.

The net result of these chemical reactions waiting to happen is that there is a potential difference across the battery. You can measure it with a meter. This voltage is due to the Oxidation and Reduction potentials of the reactions happening at the terminals.

After that, Ohm's Law applies and the current that flows depends on the external resistance and the internal resistance of the battery.

 

[oswaler]

for any help provided!

I can provide a response to your question about how electrons flow in a basic electronic circuit. In a basic circuit, the flow of electrons is driven by the presence of an electric field. This electric field is created by the difference in electric potential between the positive and negative terminals of the battery. Inside the battery, there is a buildup of electrons at the negative terminal, creating a negative charge. This negative charge repels the electrons in the circuit, causing them to flow towards the positive terminal.

As the electrons flow through the circuit, they encounter different components such as resistors, capacitors, and other electronic devices. These components can either impede or facilitate the flow of electrons, depending on their properties. For example, a resistor will impede the flow of electrons, causing them to lose energy and reducing their electric potential. On the other hand, a capacitor can store and release electrons, allowing them to flow through the circuit more easily.

As the electrons move through the circuit, they eventually return to the negative terminal of the battery. This creates a closed loop, allowing for a continuous flow of electrons. The electric field in the circuit is maintained by the difference in electric potential between the positive and negative terminals of the battery.

I hope this helps to provide a better understanding of how electrons flow in a basic electronic circuit. Good luck with your studies in electronics engineering!