question

Answer:

Voltage is the term or Electro Mototive Force that you will use every day for the restof your life as an Electrical Engineer.

Electro Motive Force is a term you will not likely use again once you pass this college course for which you are trying to cheat and get one of us to answer your homework question for you.

Do your own research, you will benefit from the experience. If we do your work for you, you will only learn to push your work on to other people. That might qualify you to be a manager, but not an engineer.

Nothing.
Or for a more detailed answer.
Absolutely nothing.

I think is the same diference between height and potencial energy,you could measure both in meters;you could too, measure tork or moment of a force in same units than energy but are very diferents concepts in same way one concept could be measured by diferents units.The important thing,i think, is the FEM is referred to the electric source as a battery and the when you solve a circuit, this "voltage" have an arrow pointing backwards the voltage drops thru resistors.-

Voltage is a measure of electromotive force.

Dear all,

I think Shaik.thameem is not asking question that need our answer, seems just practicing to become a college professor "what is the difference between the voltage and electromotive force (e.m.f.). give the detailed answer". Sir Shaik, you forgot to start your sentence from the word "Class" however if it is really a question all of the above answer are correct, but next time please don't make question sound very demanding, and being new member you are most welcome to ask very nice question.

Kind regards

Roman

The term is "electro" motive force and it is not abbreviated. It is synonoymous to voltage

- electrical pressure or potential.

The difference between voltage and emf is the difference between internal and external forces. Consider the simplest case...a standard 12 volt battery. The battery would produce (my chemical means), an electromotive force of 12 volts. A static voltage, but very much there, waiting for a connection back to its other terminal. I apply an external emf to it which I will measure in volts, say 14 volts positive compared to the negative pole of the battery. My applied emf will face a counter emf of 12 volts, resulting in an effective application of only 2 volts. If putting 14 volts to a 12 volt battery resulted in a current flow of 1 amp, then what would be the internal resistance of the battery?

A motor will usually act as a generator. As you spin it up with an applied voltage, it will generate a counter emf inside itself, which will oppose the incoming electricity, effectively creating automatic current limiting...the faster the motor goes, the less energy it will draw. In other words, a variable impedance dependant upon load and speed.

So the simple answer is emf is the force which pushes current through a wire, a generator, a coil or whatever, and we can measure this emf (OR ITS DIFFERENTIAL EFFECTS) in units of voltage. As you can see in the above examples, you can get some pretty powerful emf's which do not necessarily result in very high voltages. The emf (of any voltage producing item like a battery or a generator) is always the same, the voltage depends on where and how you measure it from.

I'll leave the detailed answer to your further study.

Electromotive force is the force that makes electrons flow. Voltage is the unit of measurement of the EMF (named after Alessandro Volta).

Hmmmm I always though an emf was and elctro magnetic field.

Ah well I should have paid more attention in class.