# resistance of wires

• Jan 6th 2009, 11:20 AM
resistance of wires
do u think long or short wires have the higheset resistance explain why?

that was part 1 of the question
part 2 is:what will you measure to find outwhich wires have the highest resistance?
• Jan 6th 2009, 12:36 PM
HallsofIvy
Resistance in wires is like friction as water flows through a river- the longer the river, the more the friction.
• Jan 6th 2009, 01:19 PM
mr fantastic
Quote:

do u think long or short wires have the higheset resistance explain why?

that was part 1 of the question
part 2 is:what will you measure to find outwhich wires have the highest resistance?

Any science textbook discussing electricity will give you the answers. And look what you can find using Google (it took me 67 seconds):

Electrical Resistance

ScI-Journal | What Factors Affect the Resistance of a Wire? (1)

Resistance and Resistivity
• Jan 6th 2009, 01:41 PM
vincisonfire
A short wire has a higher resistance than a longer one for the simple reason that electrons have to go through a longer piece of wire. Else, we would try to make wire as long as possible everywhere. We see that it is the opposite indeed.
The length but also the diameter of a wire is important.
The material of it is also a relevant parameter.
Actually, we observe that it is mainly the electron on the surface that moves and that's why wires are often an assembly of many small wires.
Finally, I suggest that you post this kind of question on the physics forum.
• Jan 6th 2009, 06:02 PM
mr fantastic
Quote:

Originally Posted by vincisonfire
A short wire has a higher resistance than a longer one for the simple reason that electrons have to go through a longer piece of wire. Else, we would try to make wire as long as possible everywhere. We see that it is the opposite indeed.
The length but also the diameter of a wire is important.
The material of it is also a relevant parameter.
Actually, we observe that it is mainly the electron on the surface that moves and that's why wires are often an assembly of many small wires.
Finally, I suggest that you post this kind of question on the physics forum.

I think you meant to say

A short wire has a lower resistance than a longer one
• Jan 7th 2009, 03:13 AM
vincisonfire
Yes that's what I meant.