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Home Q & A Board Science-Related Homework Help Physics
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RioNii RioNii
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2 years ago Edited: 2 years ago, bio_man



A current of 83.4 mA exists in a metal wire.
(a) How many electrons flow past a given cross section of the wire in 10.3 min?
electrons
(b) In what direction do the electrons travel with respect to the current?
C) same direction
C) opposite direction
C) The magnitude is zero.
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6 Replies
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#1
Educator
2 years ago
Hi RioNii

This is similar to another one you posted earlier.

For (b): Before physicists knew about (negatively charged) electrons being the charge carriers in electrical current, they defined current to flow from + to -. Because electrons move from - to + ("repelled by the minus pole, attracted by the + pole" ), they travel in the direction opposite to the (imaginary!) current.
RioNii Author
wrote...
#2
2 years ago Edited: 2 years ago, RioNii
Sir it is not similar, this one is asking about a current of 83.4 mA exists in a metal wire withh a question, how many electrons flow past a given cross section of the wire in 10.3 min while the other one was asking about a metal wire that carries a current of 80.6 mA and find the number of electrons that flow past a given point in the wire in 10.9 minutes.
Post Merge: 2 years ago

Sir please lend me a helping hand
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bio_manbio_man
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#3
Educator
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2 years ago
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RioNii Author
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#4
2 years ago
Sir is this the only possible answer? The system does not accept it Frowning Face
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#5
Educator
2 years ago
I really don't know, I used the correct formula I think. Do you have a sample question I can review?
RioNii Author
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#6
2 years ago
Oh it's ok now sir, thank you very much for always helping!
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