Units of electric charge
The S.I. unit of charge is Coulomb represented by ‘C’.
And this is the amount of charge that is contained by 6 X 1018 electrons
Charge on 1 electron = -1.6 X 10-19 C
Charge on 1 proton = +1.6 X 10-19 C
- Electric current
To understand this concept in an easy way lets read the following rhyme:-
Flow of Air
Makes air current,
Flow of water
Makes water currents
Flow of electric charges
Make electric current.
Finally electric current is the amount of charge flowing through a particular area in a unit time.
Or simply it is the rate of flow of the electric charges.
It is represented by I
Electric current = charge/time
I = Q/t