Question

What is current

Answer 1

The movement of charge.

Answer 2

\(I\) or \(i(t)\) is used to represent the \(\it{i}\)ntensity of an electric current.

The SI unit of current is the ampere: \([\text A]\),
equal to a coulomb (unit of charge) per second: \([\text C/\text s]\).

The current is rate at which a (positive) charge \(q\) is moving:
\[\qquad I=\frac{dq}{dt}\]

Answer 3

Please note that the charge may be negative as well as positive. Current in metal such as copper conductors consist primarily of negative charges (electrons)