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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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