Quantcast

Got Homework?

Connect with other students for help. It's a free community.

  • across
    MIT Grad Student
    Online now
  • laura*
    Helped 1,000 students
    Online now
  • Hero
    College Math Guru
    Online now

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

woleraymond

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?

  • one year ago
  • one year ago

  • This Question is Closed
  1. henpen
    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)

    • one year ago
  2. henpen
    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).

    • one year ago
  3. Mikael
    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 \[\Delta V = E*\Delta x\]

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

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

    • one year ago
  5. henpen
    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.

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

    |dw:1347905879599:dw|

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

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

    • one year ago
  8. woleraymond
    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

    • one year ago
  9. woleraymond
    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

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

    it's close my is 8.85x10^-4

    • one year ago
    • Attachments:

See more questions >>>

Your question is ready. Sign up for free to start getting answers.

spraguer (Moderator)
5 → View Detailed Profile

is replying to Can someone tell me what button the professor is hitting...

23

  • Teamwork 19 Teammate
  • Problem Solving 19 Hero
  • You have blocked this person.
  • ✔ You're a fan Checking fan status...

Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.

This is the testimonial you wrote.
You haven't written a testimonial for Owlfred.