Current flow is defined as the movement of in a conductor. The discovery of magnetic lines of force generated by came after 1845.

movement of electric charge, by Michael Faraday Magnetism.

Explanation:

The electric current is the stream of charged particles and moves through an electric conductor. It can be measured by the electric change throughout the surface.  Moving particles are called charged carriers, the electric current in them are charged electrons that move through a wire. Michael Faraday discovered that the magnetic fields are generated by the electric current crossed by the line of force. Magnetism creates a magnetic current that came after 1845.