Current through Point or Cross Sectional Area

[Prof. 27]

Homework Statement

I'm finding conflicting statements. One says that current is measured as the amount of charge per time that enters through a cross sectional area. Another says that current is measured as the amount of charge per time that passed through a point. Could someone clarify this for me?

Homework Equations

I = Q/t

The Attempt at a Solution

Physics Classroom and Wikipedia.

 

[mfb]

Charge does not pass through a point.
In electronic circuits, you often do not care about the details of your cable cross-section, so you can talk about "points" that are really cross-sections across the cable.

 

[Prof. 27]

Thanks so much.