explain with diagram the flow of electric current in an electric circuit?

Hi! Ananthakilan,

 

The conventional current is the flow of positive charge through a conductor. In a circuit representation, current is always shown to be flowing from positive end to negative end.

But, actually electric current is flow of electrons which is negatively charged. Clearly, the flow of electrons is from negative end to positive end.

You can understand these concept by the given diagram.