what is the difference between emf, current& potential difference?

Answer 1

emf (electromagnetic field) a field of force that consists of both electric and magnetic components, resulting from the motion of an electric charge and containing a definite amount of electromagnetic energy

current: a flow of electricity which results from the ordered directional movement of electrically charged particles

potential difference : difference btwn two charges in an electric field

Answer 2

Electromotive force (emf) is defined as the amount of energy gained per unit charge that passes through a device in the opposite direction to the electric field produced by that device. It is measured in volts.

Electric current is by definition the flow of electric charge. The SI unit of electric current is the ampere (A), which is equal to a flow of one coulomb of charge per second.

In physics, the potential difference is a quantity related to the amount of energy that would be required to move an object from one place to another against various types of forces. The term is most frequently used as an abbreviation of 'electrical potential difference', but it also occurs in many other branches of physics. Only changes in potential or potential energy (not the absolute values) can ever be measured.

Answer 3

An electric current
follows similar rules as a fluid flow in a duct.
The difference is how the electron moves .The electrons moves by collision to colision it does not mome the lenght of the conductor,it merely transfers power to the next electron.So an electric current is a power transfer process.

Emf is called electromotive force
which is the result of the motion of the electron force to effect the power transfer in the conductor which has many free electrons.
The flow of electrons is the result of magnetic field interaction with the free electrons in the conductor.(Usually a metal which is rich in free electrons.)
Emf is an electrical force measured in units of volts.

Electrical Potential difference
is very analogous to gravitational potential difference.In the sense that its the difference of forces between two fields.
An electric field is defined as force per unit charge whereas the gravitational field is defined as force per unit mass. Hence the two systems are equivalent.

The Potential difference is a difference between two electrostatic forces and its also measured in units of volts.

Answer 4

emf is electromotive force is a force that causes the flow of electricity from one point to another e.g. electrons pushed by a generator. It can also denote the amount of energy converted by a battery and supplied to each coulomb of charge. Unit volts (V).

Current is the rate of flow of charge. It is a value of the amount of coulombs passing through a point in a wire each second. unt ampere (A)

Potential difference is the work done in moving a unit charge between two points. unit volts (V).

Answer 5

Nothing