(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.

**Physics Forums | Science Articles, Homework Help, Discussion**

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Electric Current - Finding # of Electrons

**Physics Forums | Science Articles, Homework Help, Discussion**