Recent content by kb1408

  1. K

    Electric field at a distance from a charged disk

    And thank you andrien for the link!
  2. K

    Electric field at a distance from a charged disk

    There was an advertisement above that link earlier so I ignored it thinking it was tied to that ad. Alright, thanks for your help! cheers!
  3. K

    Electric field at a distance from a charged disk

    Yes, that's what I did. Is it σ=Q/A then?
  4. K

    Electric field at a distance from a charged disk

    E= (3.1E-6/(2*8.85E-12))(1-((.0001/(√(.00012)+(.0242)) so E= 1.79E5 N/C where: σ=3.1E-6 C/m2 ε0=8.85E-12 C2/N*m2 z=.01E-2 m r= 2.4E-2 m
  5. K

    Electric field at a distance from a charged disk

    Doc Al, thanks for your quick reply. Unfortunately I am still doing something wrong. I am using 3.1E-6 C/m2 for σ. Is that wrong?
  6. K

    Electric field at a distance from a charged disk

    A disk of radius 2.4 cm carries a uniform surface charge density of 3.1 μ C/m2. Using reasonable approximations, find the electric field on the axis at the following distances. I have used the equation E=(Q/ε0)(1/(4*pi*r2)) I also tried the equation E=(Q/2(ε0))(1-(z/(√(z2)+(r2))) Thanks...