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!

Electric power

  1. Aug 9, 2006 #1
    R= pl/A
    what does p and l stands for?
  2. jcsd
  3. Aug 9, 2006 #2
    p is the resistivity of a material(ohms.cm). Every material normally has a set value for it. l is the length of the material.
  4. Aug 9, 2006 #3
    thank you
    But if i had a distance of 100 km ,do i replace "l" with d and convert it to metres?
  5. Aug 9, 2006 #4
    from my experience with this equation(electronic subject) we had "l" in cm, but that was because we had "p" in ohm.cm for example

    R = pl/A ----> ohms = [(ohms.cm)(cm)]/cm(^2)
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Similar Discussions: Electric power
  1. Electric Power (Replies: 4)

  2. Electric power (Replies: 2)

  3. Electrical Power (Replies: 3)

  4. Electricity and Power (Replies: 1)

  5. Electrical power (Replies: 2)