Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Charge transfer between two insulators rubbed together

  1. Nov 24, 2016 #1
    How much charge is actually transferred when two insulators are rubbed together?
    Example: When glass rod and wool are rubbed together
  2. jcsd
  3. Nov 24, 2016 #2


    User Avatar

    Staff: Mentor

    Welcome to the PF.

    One ballpark number can be calculated by using the capacitance of the "Human Body Model" used for ESD testing. The parasitic capacitance of the human body is often approximated as 100pF-220pF, and you can charge yourself up to a couple kV by rubbing the materials.

    Are you familiar with the equation relating the charge on a capacitor to the capacitance and voltage? :smile:
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted