[Main] Difference Between Voltage and EMF Explained



Difference Between Voltage and EMF


The main difference between voltage and EMF is that voltage is the potential difference between the two ends of a conductor but EMF is a force which causes the flow of electrons. Many difference between EMF and Voltage can be written but you should know the actual difference between voltage and EMF. In this article, we have tried to explain the actual difference. Here you also find many key differences between EMF and Voltage.





Actual Difference between Voltage and EMF


First of all, let's know what is current? In simple words, the flow of electrons through a conductor is called electrical current. Now the question is when electrons flow through a conductor? There are two reasons for flow electrons, one is when we create a potential difference between two ends of a conductor then the electrons start flowing from the higher potential to lower potential. Another reason is if we give push or force to the electrons they will start flow through the conductor.

So the first reason for flowing current that is the potential difference between two ends of a conductor is called Voltage.

The second reason for flowing current that is the electromotive force is called EMF.



Understanding the Difference Between EMF and Voltage with an Example


To better understand the difference we have taken the example of water flow. Here the water represents the current and the pipe represents as a conductor.

Voltage VS EMF


In the above figure, you can see, there is no force arrangement which can force the water to flow from A to B. Both A and B at the same hight so the water flow is not possible.

Main Difference Between Voltage and EMF


In the above figure, you can see A and B are at different hight. So there is no force is required to flow water from A to B. Water automatically flow from A to B because they are at different hight. So, in this case, we can think the height difference as the potential difference between two ends of conductors. Although that exact same concept not applied for electrical circuit and current. This explanation only to understand the difference between emf and voltage.

difference between EMF and Voltage


In the above figure, both A and B are at the same height. So naturally, water flow is not possible. But a pump is placed between A and B which force the water to flow from A to B. Here the pump act as EMF.


Voltage VS EMF



Voltage
EMF(Electromotive Force)
Voltage is the potential difference between the two ends of a conductor for which current flowing through that conductor.
EMF is the electromotive force which pushes to the electrons to flow through a conductor.
The voltage or potential difference can be measure between any two points of a circuit.
EMF always measure between the two terminals of the source.
Voltage may be the effect of electromagnetic force.
When EMF is applied to an electrical circuit, it creates a potential difference.
The unit of voltage is volt.
The unit of EMF is also volt
Actually, there is no source of Voltage, it just a potential difference which may create in any place in a circuit.
The source of EMFs are Dynamo, Batteries, alternator, etc.




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[Main] Difference Between Voltage and EMF Explained [Main] Difference Between Voltage and EMF Explained Reviewed by ETechnoG on 08:16 Rating: 5
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