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!

Easy gauss' law question that I wanna make sure I didn't make too easy

  1. Oct 1, 2006 #1
    A sphere of radius a has its center at the origin, and has charge density p=Ar^2

    another sphere of radius = 2a is concentric with the first. Find the flux SE*da through the larger sphere, where that's the surface integral of E dot da, like usual. It'd just be Qin/e where e is that constant, right? So I just have to do that volume integral that ends up having integrand Ar^2sin(theta) with r going from 0 to a, theta from 0 to pi, phi from 0 to 2pi?

    And though it's not asked, if I DID wanna find the electric field I'd note that da vector is r-hat*da and E only has the radial dependency, so Evector=Er*r-hat

    so you end up with Er16pi*a^2=Qin/e solve for Er?
     
  2. jcsd
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Can you help with the solution or looking for help too?



Similar Discussions: Easy gauss' law question that I wanna make sure I didn't make too easy
  1. Easy question (Replies: 0)

Loading...