what is the si unit of electric current?

The SI unit of electric current is the ampere (A).

An ampere is defined as the flow of 1 coulomb (C) of electric charge through a conductor in 1 second (s).

Formula:
Current (I) = Charge (Q) ÷ Time (t)

SI Unit Relation:
1 A = 1 C/s

Example:
If 10 C of charge passes through a wire in 2 s, the current is:

I = 10 C ÷ 2 s = 5 A

Electric current is measured using an ammeter and is one of the seven fundamental SI units in physics.