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Units questionby ehrenfest
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#1
Aug1107, 07:18 PM

P: 1,996

If a coulumb is defined as the amount of charge carried by a current of one Ampere in a second, why is its units Amperes seconds and not Amperes per seconds?



#2
Aug1107, 07:58 PM

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P: 857

[tex]I=\frac{dQ}{dt}[/tex] by definition and so [tex]Q = \int I\;dt[/tex] which has a unit of (amperes x seconds)
seems obvious to me, do I understand your question correctly? 


#3
Aug1107, 09:01 PM

P: 1,996

Yes, I see how it works mathematically. But I just thought "the amount of charge carried by a current of one Ampere in a second" was similar to the amount of charge carried by a current of one Ampere per second" so it would have units of Amperes/S



#4
Aug1107, 09:10 PM

Sci Advisor
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P: 8,954

Units question
No because a coulomb is a total amount of charge not a rate, so after 2 seconds you have 2 coulombs.



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