Current (I) : Current can be defined as rate of flowing of charge (Q).
where Q= Charge in coulumb
I = current in Ampere
t= Time in second.
1 Ampere is the charge flowing through a conductor in 1 second.
Q= I x T Amp-Sec
In an ionised electrolyte charged ions flow from one plate to another. For example negative ions flow from cathode to anode and positive ions flow from anode to cathode.
charge of 1 e = 1.6×10-19 Coulomb
or 6.25×1018 electrons= 1 coulomb