An electric current involves a movement of charged particles. Now, this isn't the complete definition, but it is a good starting point. The charged particles are quite often electrons, but there are other options, too, such as ions or holes.
You can measure current - or the lack of current - with an ammeter.
Yes, an electric current is the flow of charged particles.
DC current
The opposite of an electric current is the absence of an electric current, meaning no flow of electric charge through a conductor.
Electric current carries electric charge. Actually to say it in the right sense, we have to say that electric current is the rate of flow of electric charges
A current.
The flow of electric charges is current.
ampere
It is called an electric current.
Voltage causes current to flow in an electric circuit.
The electric current is given by: I = V/R
In metal conductors, electric current is the flow of electrons.