Today, we will discuss about conventional and electron current flow
Consider a dry cell as shown here. This cell has one positive and one negative terminal
The difference of potential between these two terminals is measured in volt
And this difference is due to an excess of electrons at the negative terminal compared
to the positive terminal. If we connect a wire across these two terminals, the potential difference causes an electric
current to flow in the circuit. This current is nothing but a flow of electrons that come out from negative terminal, move
along the wire, and enter the cell by the positive terminal. However, before invention of this electron theory of current flow, the scientists of
the 17th century, arbitrarily decided that, the electric current, flows from positive
potential to negative potential. This is so called, conventional flow of current
Till today, this is accepted, as direction of electric current flow. Hope, you understand
Thank you