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

Nature & speed of electricity

  1. Aug 5, 2015 #1
    1.Is electric current a microscopic or macroscopic quantity?I think it is macroscopic as we can feel it,but when I asked my friend he said it is microscopic as it deals with electrons.I'm a bit confused...
    2.What is the speed of electricity?Is it equal to the drift velocity of electrons or the speed of light?
    Please clarify my doubts....
     
  2. jcsd
  3. Aug 5, 2015 #2

    anorlunda

    User Avatar
    Science Advisor
    Gold Member

    1) I have no idea what you are asking about here.

    2) if I create an electrical disturbance at one end of a long wire (think of power lines crossing continents), the disturbance travels down the wire at 0.5 to 0.8 light speed, but the electrons drift hardly any distance.
     
  4. Aug 5, 2015 #3
    1) It depends on if your an electrical engineer or a quantum physicist. EEs treat electricity in macroscopic terms like voltage and current and don't worry about individual electrons or whatever (most of us anyway). Quantum physicists treat electrons and photons as individuals.

    2) Both. Electrons move slowly. Photons move quickly. Both are electric have electrical qualities.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook