(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

a) The potential difference in a simple circuit is 13 V and the resistance is 3 . What current I flows in the circuit? Answer in units of A.

(I got I = 4.333 which is correct)

b) How many electrons pass a given point in the circuit in 7 min?

2. Relevant equations

I=[tex]\Delta[/tex]Q/[tex]\Delta[/tex]t

n = I*t/q

3. The attempt at a solution

I'm having trouble with Part B of the question.

I used n = I*t/q, so 4.333A*420sec/1.6e^-19 =1.1374e^22

Also, one ampere is 1 C per second, so 4.333*6.241e^18*420sec =1.1357e^22

But both answers are wrong.

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# Electric Current - Finding # of Electrons

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