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!

Diameter of a soap bubble increases when it is charged

  1. Sep 2, 2011 #1
    "Diameter of a soap bubble increases when it is charged." why?
     
  2. jcsd
  3. Sep 2, 2011 #2

    ZapperZ

    User Avatar
    Staff Emeritus
    Science Advisor
    Education Advisor
    2016 Award

    Re: Electrostatics

    It is charged with the SAME type of charge, i.e. say you put a lot of electrons on it. Now think of what an electron would like to do to another electron (other than sucker punch it or flip its spin).

    Zz.
     
  4. Sep 2, 2011 #3

    Hootenanny

    User Avatar
    Staff Emeritus
    Science Advisor
    Gold Member

    Re: Electrostatics

    :rofl:
     
  5. Sep 2, 2011 #4

    xts

    User Avatar

    Re: Electrostatics

    Don't believe everything you are told. Take an experimantalist's approach. Make a soap bubble. Then charge it with electricity made with a piece of plastic rubbed by woolen cloth.

    I guess this is one more most-stupid-example-found-in-school-textbook-on-physics making kids hating physics and showing them that physics is a set of formulae and rules predicting world behaviour contrary to their own experience.
     
  6. Sep 2, 2011 #5

    xts

    User Avatar

    Re: Electrostatics

    @ZapperZ - excercise for you:
    A bubble 1cm in diameter, normal air pressure.
    Charge it to 100,000V (or 1 million...)
    Compute 'increase' of diameter.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: Diameter of a soap bubble increases when it is charged
  1. Soap Bubbles! (Replies: 3)

  2. Ant soap bubble (Replies: 11)

  3. Soap bubble (Replies: 6)

Loading...