1. Not finding help here? Sign up for a free 30min 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!

Charge over an Insulating Plate

  1. Mar 5, 2012 #1
    1. The problem statement, all variables and given/known data

    Charge is distributed uniformly over the surface of a very large thin
    insulating plate to a density of 5.00 x 10–6 C/m2 . An insulating string
    connects a tiny charged bob to the vertical plate as shown in the
    diagram. If the mass of the object is .001 g and the string makes an
    angle of 30o to the plate, how much charge is carried by the bob?

    2. Relevant equations

    I have no clue.

    3. The attempt at a solution

    No idea where I should start. Can someone point me in the right direction?
     
  2. jcsd
  3. Mar 5, 2012 #2

    SammyS

    User Avatar
    Staff Emeritus
    Science Advisor
    Homework Helper
    Gold Member

    First explain where the string is attached to the plate.

    Better yet, post an image of the diagram.
     
  4. Mar 5, 2012 #3
    Diagram here:
     

    Attached Files:

  5. Mar 5, 2012 #4

    SammyS

    User Avatar
    Staff Emeritus
    Science Advisor
    Homework Helper
    Gold Member

    What is the Electric field near the surface of the plate?
     
  6. Mar 5, 2012 #5
    Take the force of gravity times a component of the angle, multiply by the charge of a proton?
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: Charge over an Insulating Plate
  1. Charged plate (Replies: 6)

  2. Charged insulator (Replies: 1)

  3. Charging an insulator (Replies: 1)

Loading...