Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

woleraymond

  • 3 years ago

An infinite charged sheet has a surface charge density of 1 x 10^-7 Cm^-2 .How far apart are the equipotential surfaces whose potentials differ by 5volts?

  • This Question is Closed
  1. henpen
    • 3 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Work out the electric field at any point, and use the fact that potential energy is \[-\int\limits_{\infty}^{a}F(x)dx\](i.e. a unit charge is dragged from infinity, parallel to the field lines, to a)

  2. henpen
    • 3 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Use the fact that the electric field is the same everywhere (think of the electric flux through a cylinder on the plane).

  3. Mikael
    • 3 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    Simpler when the field is constant which it is here - always for infinite plane \[\Delta V = E*\Delta x\]

  4. Mikael
    • 3 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    so 5 = E*Delta x find E and then it will help find\[\Delta x\]

  5. henpen
    • 3 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Yes, basically my integral simplifies to \[U=-Fx\] As F is not actually a function of x. Evaluated from infinity to a, or more simply the change in PE (from b to a), yields Mikael's result.

  6. RaphaelFilgueiras
    • 3 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    |dw:1347905879599:dw|

  7. henpen
    • 3 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    http://www.youtube.com/watch?v=ldJhMDuOGxY

  8. woleraymond
    • 3 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    @RaphaelFilgueiras pls can you be more legible with ur formulas.....@benpen thanks for the link

  9. woleraymond
    • 3 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    but the value i get is 8.98 x 10 ^ -4 m @RaphaelFilgueiras any clues

  10. RaphaelFilgueiras
    • 3 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    it's close my is 8.85x10^-4

  11. Not the answer you are looking for?
    Search for more explanations.

    • Attachments:

Ask your own question

Sign Up
Find more explanations on OpenStudy
Privacy Policy