Differences b/w Voltage,EMF,Potential diff.

[rhia]

What are the differences among voltage,emf and potential difference?
n b

 

[ehild]

What are the differences among voltage,emf and potential difference?
n b

Voltage is defined between two points A, B in an electric field or in an electric circuit as the work done by the electric field when a unit positive charge moves from A to B.
The potential at a point A is defined as the work done by the field when a unite positive charge moves from A to the place of zero potential.
From these definitions follows that the voltage UAB = UA - UB, that is the negative of the potential difference which is UB-UA.
Electromotive force (emf) is defined for voltage sources, and it is equal to the voltage across the terminals of the unloaded source (when nothing is connected to it).

ehild

 

[Graeme Robinson]

Voltage, EMF, and potential difference are all related to the flow of electricity, but they have distinct differences.

Voltage is the measure of electrical potential difference between two points in a circuit. It is often described as the "pressure" or "push" that causes electricity to flow. Voltage is measured in volts (V) and is represented by the symbol V.

EMF (electromotive force) is the maximum potential difference that a source of electrical energy, such as a battery, can provide. It is the force that drives electrons through a circuit. EMF is also measured in volts (V) and is represented by the symbol E.

Potential difference, also known as voltage difference, is the difference in electrical potential between two points in a circuit. It is the measure of the change in voltage between two points and is often used to describe the energy that is lost or gained by an electron as it flows through a circuit. Potential difference is also measured in volts (V) and is represented by the symbol ΔV.

In summary, voltage is the measure of potential difference, EMF is the maximum potential difference that a source can provide, and potential difference is the difference in voltage between two points in a circuit. They are all related to the flow of electricity, but they have distinct definitions and uses in the study of electricity.