| Topic: |
Science > Physics |
| User: |
"metrcks" |
| Date: |
23 Aug 2003 07:13:27 PM |
| Object: |
velocity of an electron in a circuit |
could some help me out by giving me a formula for finding the velovity
of an electron in a circuit with the use of
resistance/current/voltage.
Thanx
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| User: "Uncle Al" |
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| Title: Re: velocity of an electron in a circuit |
24 Aug 2003 11:52:03 AM |
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Sam Wormley wrote:
metrcks wrote:
could some help me out by giving me a formula for finding the velovity
of an electron in a circuit with the use of
resistance/current/voltage.
Thanx
See: http://hyperphysics.phy-astr.gsu.edu/hbase/electric/ohmmic.html
Note that in the proffered copper example, 46 amps pumped through a 1
mm diameter wire is a really bad idea. One should scale down by at
least a factor of 10 to give a drift velocity of no more than 430
microns/second. House wiring, for instance, is way thicker than 1 mm
even for a 10 amp line.
--
Uncle Al
http://www.mazepath.com/uncleal/
(Toxic URL! Unsafe for children and most mammals)
"Quis custodiet ipsos custodes?" The Net!
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| User: "Uncle Al" |
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| Title: Re: velocity of an electron in a circuit |
24 Aug 2003 11:45:46 AM |
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metrcks wrote:
could some help me out by giving me a formula for finding the velovity
of an electron in a circuit with the use of
resistance/current/voltage.
Find the wire diameter and density. Assume one valence electron
donated/atom into the conduction band. Put through a nominal current
for the wire gauge chosen. See how much wire volume (hence length at
constant diameter) one second of current occupies, electrons injected
displacing conduction band electrons present. One mole of electrons
is 96,485.3 coulombs. One ampere is 1 coulomb/second.
In round numbers, a common wire carrying DC current has conduction
band electron drift velocity of a few microns/second.
--
Uncle Al
http://www.mazepath.com/uncleal/
(Toxic URL! Unsafe for children and most mammals)
"Quis custodiet ipsos custodes?" The Net!
.
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| User: "Bill Vajk" |
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| Title: Re: velocity of an electron in a circuit |
23 Aug 2003 07:43:24 PM |
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metrcks wrote:
could some help me out by giving me a formula for finding the velovity
of an electron in a circuit with the use of
resistance/current/voltage.
Thanx
Start here:
http://tinyurl.com/kzgb
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