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Question:

Two electric conductors. Whats the difference? Please Help!?

A copper wire and iron bar has the same length, diameter and current in them. What‘s their difference when compared to one another in terms of RESISTANCE and VOLTAGE DROP.answers will be very much appreciated. thanks guys!

Answer:

Copper is the better conductor, so its resistance will be the lesser and so will the voltage drop across its ends.
If you have such good machining equipment why not just build a hub which can use sealed bearings. You could use a case hardened axle with s-nuts to hold it together. I'd personally use 4 sealed bearings in the hub.
Yes its resistance . Resistance R (r')* L/A where r' is the specicfic resistance. L is the length A is the area pi * (D/2)*(D/2) where D is the diameter now as you can see the specific resistance of copper is less than that of iron hence for same current I the voltage drop V is equal to I^2 * R Now R will be more for iron as it has more specific resisatnce which is denote by r' prononuced as rho Hope that helps
you probably don;t have the right alloys even if you could turn them correctly which i doubt also also i have wheels with 40,000 miles and no new cones you are doing something wrong either they aren;t really worn out or there is a lot of dirt or they are not adjusted right or they are just crap wle

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