Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

[Drift velocity] Factors affecting velocity

  1. May 27, 2012 #1
    1. Is the charge density (No. of charges/volume) constant for a specific material ? e.g. Copper has a constant charge density no matter how big it is ?

    2. Why someone told me that increasing the cross-sectional area of a wire will not affect its drift velocity ? The resistance will be reduced and the electrons can move faster, isn't it ?
     
  2. jcsd
  3. May 27, 2012 #2

    ZapperZ

    User Avatar
    Staff Emeritus
    Science Advisor
    Education Advisor
    2016 Award

    You need to learn the difference between "resistance" and "resistivity". This is the same as the issue between "mass" and "density". One requires the knowledge of a volume of the object, the other doesn't.

    Zz.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: [Drift velocity] Factors affecting velocity
  1. Velocity Factor (Replies: 19)

Loading...