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hello

I can't figure out why the next formula tells us the number of charges that move trough cross-sectional area of the conductor.

If a segment of wire has N charges moving with average velocity v, then in time [delta]t the number of charges is

N * A * v * [delta]t

A is the cross-sectional area of the conductor

N is number of charged particles per unit volume

thank you

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# This is - number of charges trough

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