This post will explain both terms, What Is Current and Electric Potential
Concept Of Current
An electric current is defined as the movement of electrons or flow of electrons inside a conducting material. It is denoted by I and measured in ampere (A).
The current due to the flow of electrons is called an electron current. The electron current flows from the negative end of the battery to the positive end
Conventionally the current is said to be flowing from higher potential to lower potential.
Hence, even though the actual electron current flows from the negative to the positive terminal, the conventional current is said to flow from the positive end of the battery to the negative end of the battery.
Thus, the direction of flow of conventional current is always opposite to that of the electron current.
Relation between Charge and Current
Current is defined as the flow of electrons. Higher the number of flowing electrons, higher is the value of current. But each electron carries a constant charge on it.
We can define the current as the flow of charge per unit time or current is defined as the rate of change of charge with respect to time.
Mathematically the charge – current relation can be defined as,
Concept of Electric Potential and Potential Difference
Consider the two-charge particle having the similar charge as shown in flowing fig. As the charge are similar, there is a force of repulsion between them.
Definition of Electric Potential
If charge B is to be brought closer to charge A, then work has to be done against the force of repulsion.
This work done against the force of repulsion to bring a charge closer to the other one is called as Electric Potential, and it is measured in Volts.
Potential Difference (P.D.)
Potential difference between any two points is defined as the difference between the electric potentials at those points.