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Go Back   Freemason Hirams Travels Masonic Forums > Science & Mathematics > Physics

Physics Physics

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Old 04-27-2008, 01:07 AM
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Please answer this Physics problem?(knowledge question)?

Describe qualitatively how each of the following affects the movement of electricity through a conductor
Length
Cross sectional area
Temperature
Material
well i still need temperature and material so i hope some one can tell me how exactly temperature effects the flow of electricity and how does the material change the movement of electricity in the conductor?
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Old 04-27-2008, 01:08 AM
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i am a student of engineering

i am pakistani and my english is not so good so dont mind on wrong spellings just focus in the theme of my answer
the major thing is RESISTENCE

first of all you have to know about resistence did you now that any way risistence is a effect of conductor which perfom as a speed breaker in the way of flow of electron
flow of electron is called electricity
if a conductor give us a lot of resistence against the current then we have a lot of loss

if we increase the length of counder then the resistence will be increase this is tottlay loss of electricity and in this case the conductor will be heated
similarly if we dicrease the length resistence will be dicrease

if we use a wire of 0.5mm wire then we have more resistence then 1.0mm or 1.5mm
its mean that if we increase the cross sectional are of wire then resistence will be dicrease

if we increase the temperature then resistence will be increase

meterial is the most important compunent of counductor
in our country we use a word"SPESIFIC RESISTENCE"
its mean resissence per meter(R/m)
if the spesific resistence is less then the conductor is best

the best conductor is
Gold
Silver
& Copper
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Old 04-27-2008, 01:11 AM
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I guess you want to know the resistance of a wire conductor.

To keep it simple,I would answer so simple -

1.More length,more resistance since a charge has to move longer.
2.Cross section area.More area,less resistance.
3,4 These two factors are quite depend on its characteristics.

Please note that answers above are given by limit conditions for example, DC or AC , low freq. or high,etc.
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