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Strikegundam 06-28-2008 11:19 PM

Help with Physics HW
If a current of 2A flows through a lamp filament, find the number of coulombs that flow through the filament each minutes?

Can anyone help me with question and explain it

Pandaccoon 06-28-2008 11:29 PM

An ampere is one coulomb of charge going past a given point in the duration of one second.
I = Q/t
Q = It
where Q is your coulomb of charge, I is your current and t is time in seconds.
Since we have 2 Amperes, thats 2 coulombs of charge going through your lamp filament per second. The question asks for coulombs per minute so you just convert 2coulombs/sec to number of coulombs/1minute:

(2coulombs/1sec) * (60sec/1minute) = 120 coulombs per minute

Strikegundam 06-28-2008 11:55 PM

ok i got it..
Thx a lot.

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