1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

A question on electric current's density & flow.

  1. Feb 7, 2015 #1

    neomahakala108

    User Avatar
    Gold Member

    is this true? thanks for help.

    i wished to abstract (generalize on topic) from electric current in physical wires, to for example in air.

    i hope this is in proper forum section.
    ----
    Electric current's density J depends on electric current's intensity I measured in (A) & on conductor wire's gauge S measured in mm2.

    It is described by a physical formula:

    J = I / S,

    where:
    - J is electric current's density, measured in A / mm2,
    - I is electric current's intensity, measured in A,
    - S is conductor wire's gauge, measured in mm2.

    As electrons flow between two points with different electric potential (amount of electrons & positrons in an atom), physical medium resists their flow & gets heated.

    Amount of heat depends on:
    - conductor wire's gauge, measured in mm2 - the more matter the less heat,
    - electric intensity - the more amperes the more heat,
    - conductor wire's material - the more resistance the more heat.

    in thinner conductor wires, electrons flow faster.
     
    Last edited: Feb 7, 2015
  2. jcsd
  3. Feb 7, 2015 #2

    Svein

    User Avatar
    Science Advisor

    Heat = [itex] rI^{2}[/itex]. Power transmitted = U⋅I.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: A question on electric current's density & flow.
Loading...