CBSE Class 12-science Answered

All things are made up of very thin particles called atoms. Everything from metals, wood, glass, water and gases are made of atoms.

We cannot see atoms because they are very, very small. However, scientists have found out that even atoms are made up of  smaller particles. One of the many types  of particles in an atom is the electron.

We get electric current because of the movement of the electrons. So, current is the flow of electrons. One might imagine electrons  traveling from  one end of the wire to the other end and making a continuous flow, just like the flow of water in a pipe ( though the two  are not exactly identical ).