Electric current

Electric current is a electric charge flowing through any section of a conductor in 1 second.

Current = charge flow(q)

                       Time(t)

Current is measure in Ampere how is it ?

i.e. Charge is measure in coulomb & time in second so

I = coulomb  =  Ampere (A)

       second

Current Direction
Direction of electric current is always opposite to the flow of electrons. 

We konw current is a flow of electrons but how much it flow given below 

1 Amp = 6.250 × 10^21  Electrons/second

Conductivity

Electrical Conductivity involves flow of free electrons from solid body i.e. Copper wire.

 Cu having only 1 electron in outershell. If we push free electron in cu wire it will find new atom & the negative charge of that electron will eject another electron from otershell & electron flows from atom to atom.