Width of wire

  • Thread starter scotty0409
  • Start date
  • #1
What is the effect of increasing the width of a wire on it's resistance, and why?

Thanks
Neil
 

Answers and Replies

  • #2
cristo
Staff Emeritus
Science Advisor
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What do you think? Do you know the structure of a metal/solid?
 
  • #3
Does it decrease because there are more electrons to move freely?
 
  • #4
ranger
Gold Member
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Does it decrease because there are more electrons to move freely?
You pretty much got it. Just think of a pipe where you can vary the diameter to affect the water flow.
 
  • #5
ok thanks for the help
 
  • #6
berkeman
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So now that you've figured it out with help from ranger, here is the general equation that you should memorize (yes, there are a handful of equations that you should memorize):

[tex]R = \frac{\rho L}{A}[/tex]

So an increase in the "width" of a conductor increases the area of the conductor, which does what?
 
  • #7
So now that you've figured it out with help from ranger, here is the general equation that you should memorize (yes, there are a handful of equations that you should memorize):

[tex]R = \frac{\rho L}{A}[/tex]

So an increase in the "width" of a conductor increases the area of the conductor, which does what?
Sorry, but what does pL represent?
 
  • #8
ranger
Gold Member
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p = static resistivity of material and L = length of specimen.
 

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