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!

Homework Help: Help with this problem about electricity

  1. Oct 14, 2012 #1
    Can anybody help me with this problem?

    A spherical conductor of radius a is located at the center of a spherical conducting shell of inner radius b. The space between the inner conductor and and conducting shell is filled with an insulator of resistivity rho. A thin wire is passed through the outer conductor and insulator shells to the center conductor and voltage V is then applied between the inner conductor and the conducting shell. How much current is drawn from the voltage source?

    Integrate the power density (sigma E^2) over the insulator volume and compare the integral power to the power drawn from the voltage source (I V).
  2. jcsd
  3. Oct 14, 2012 #2
    nobody? =(
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook