Physics Help Forum electric current and power

 Electricity and Magnetism Electricity and Magnetism Physics Help Forum

 May 20th 2010, 04:02 PM #1 Junior Member   Join Date: Mar 2010 Posts: 9 electric current and power this question may be stupid easy but for some reason i cannot remember how to do it... A current of 3.60A flows for 15.3 seconds thorough a conductor. Calculate the number of electrons that pass through a point in the conductor in this time. What i was doing: I = q/t q = It q = (3.60A)(15.3s) q = 55.8 C So i got the charge, but was i supposed to? How do i find number of electrons?? sooo confused.
 May 20th 2010, 04:05 PM #2 Junior Member   Join Date: Mar 2010 Posts: 9 nevermind friends. I figured it out. You had to divide by the charge of an electron after you found the charge. Ugh. that's embarassing.
May 22nd 2010, 12:44 AM   #3
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 Originally Posted by tMas this question may be stupid easy but for some reason i cannot remember how to do it... A current of 3.60A flows for 15.3 seconds thorough a conductor. Calculate the number of electrons that pass through a point in the conductor in this time. What i was doing: I = q/t q = It q = (3.60A)(15.3s) q = 55.8 C So i got the charge, but was i supposed to? How do i find number of electrons?? sooo confused.
q = n*e where n is the number of electrons and e is the charge on the electron. You have calculated q. Now find n.

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