Dear student
Electric current is defined as the rate of flow of charge through a conductor.
I = q/t
It's SI unit is Ampere.
Potential difference is defined as the work done to move a unit charge from one point to another.
the formula to find potential difference is V =W/Q
where v = potential difference,
w= work done ,
Q = amount of charge
The SI unit of potential difference is Volt (V) .
Regards