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Electric Circuit

How do you calculate the number of electrons that must flow in 1 second to give a current of 1 amp?
1 Amp equals 1 Coulomb per second

Magnitude of the charge on 1 electron = 1.602x10-19 Coulombs

so the question is basically asking how many electrons make up one coulomb
Original post by automan2017
How do you calculate the number of electrons that must flow in 1 second to give a current of 1 amp?


Worth knowing the two equations,

Q=ItQ=It and Q=neQ=ne

QQ is the charge in Coulombs, II is current in amps and tt is time in seconds.

nn is the integer (whole number i.e. 1, 3, 79 etc. not decimals) number of electrons (or protons) and ee is the electron charge

Equating the two equations as they're both equal to charge, It=neIt=ne where e≈1.6×10−19e \approx 1.6 \times 10^{-19}

Substitute in the values and find nn
(edited 6 years ago)

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