# Difference between Electromotive Force (EMF) and Potential Difference

Electricity is all around us and is a key part of our modern lives. We use it to power our homes, businesses, and gadgets. But do you know what electricity is? In this blog post, we will discuss the difference between electromotive force (EMF) and potential difference. We will also look at some examples of each to help illustrate the concepts. Are you ready to learn about electricity? Let’s get started!

Contents

## What is Electromotive Force (EMF)?

Electromotive force (EMF) is a measure of the potential difference in a circuit. It is the work done per unit charge as it moves around a closed circuit. The SI unit of EMF is the volt (V). EMF can be caused by various sources, such as chemical reactions, heat, light, and mechanical stress. When an EMF is applied to a circuit, it causes a current to flow.

This is because the charged particles in the circuit are free to move and will do so when an EMF is present. The strength of the current will depend on the resistance of the circuit. If the circuit has a high resistance, then only a small current will flow. If the circuit has a low resistance, then a large current will flow. EMFs are important in many applications, such as electrical power generation and electrical motors.

## What is the Potential Difference?

Potential difference is the difference in potential energy between two points in an electric field. Potential difference can be caused by a variety of factors, including voltage, current, and resistance. Potential difference is measured in volts, and it is the key factor that determines the amount of current flowing through a circuit. Potential difference can be used to calculate the amount of work done in a circuit, as well as the amount of power dissipated in a resistor. Potential difference is an important concept in electrical engineering, and it is essential for understanding how electric circuits work.

## Difference between Electromotive Force (EMF) and Potential Difference

Electromotive force (EMF) is the work done per unit charge to bring the charge from infinity to that point within an electric field. A point within an electric field has a certain amount of potential energy, and the EMF is equal to the change in potential energy divided by the charge. Potential difference, on the other hand, is the work done per unit charge to move a charge between two points within an electric field. The potential difference is equal to the change in potential energy divided by the charge. EMF is a measure of the total potential energy available while potential difference is a measure of the potential energy available per unit charge. Thus, they are two different but related quantities.

## Conclusion

In conclusion, EMF is the force that drives current through a wire, while potential difference (voltage) is the measure of how much work can be done per unit of charge. They are both important concepts to understand when working with electricity, and it’s important to be able to distinguish between them.