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Old May 20th 2010, 05:02 PM   #1
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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.
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Old May 20th 2010, 05:05 PM   #2
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Join Date: Mar 2010
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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.
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Old May 22nd 2010, 01:44 AM   #3
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Location: Udupi, Karnataka, India
Posts: 292
Originally Posted by tMas View Post
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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