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Charge of an electron in Coulombs? 
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#1
Jun1012, 06:27 AM

P: 12

Is it correct that the charge of an electron in Coulombs is
 1,602 176 565(35) • 10^{19} C ? By inserting this in the formular for current I = Q / t, that would make the current a negative number. I dont reckon having read about negative currents though. So what's the explaination for how the negative sign dissappears and currents end up always being positive? 


#2
Jun1012, 06:56 AM

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#3
Jun1012, 07:03 AM

P: 12

but is it correct that the charge of an electron in Coulombs is  1,602 176 565(35) • 10^19 ?



#5
Jun1012, 07:18 AM

P: 12

so lets say.. 18 C would be then be 18 / ( 1,602 176 565(35) • 10^(19)) electrons? That's a negative number, how is it possible to have a negative number of electons?



#6
Jun1012, 07:20 AM

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What problem are you trying to solve? 


#7
Jun1012, 07:33 AM

P: 12

In the text book that I have, it comes with this example:
A 5 amp current flows for an hour. The total charge that passes by in such case, is Q = I • t = 5 A • 3600 s = 18000 C or 18000 Coulombs. Now how many electrons is that? 


#8
Jun1012, 07:35 AM

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#9
Jun1012, 08:09 AM

P: 12

So coulomb is not the unit for charge, but the unit for the magnitude of charge?



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