Current through Point or Cross Sectional Area

  • #1
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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.
 

Answers and Replies

  • #2
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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.
 
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  • #3
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Thanks so much.
 

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