CH2 CQ

• Consider a Gaussian surface in form of a cube. A charge Q is placed exactly in the center of this cube. What is the flux through each of faces of cube?

  Q/(6ε0)
• Consider three spheres all caring charge Q uniformly distributed over the volume. Sphere #1 is of radius R/2; Sphere #2 is of radius R; sphere #3 is of radius 2R. Rank electric field created by these spheres at distance R/2 from the center, greatest first:

  1, 2, 3
• Consider three spheres all caring charge of the same uniform charge density ρ. Sphere #1 is of radius R/2; Sphere #2 is of radius R; sphere #3 is of radius 2R. Rank electric field created by these spheres at distance R/2 from the center, greatest first:

  Electric field is the same for all
• Is it possible for a conductor to have charge uniformly distributed over the volume?

  No according to Gauss’s law
• A point charge +5 C is positioned in the center of a hollow metallic shell of radius R. Shell itself carries charge -2C. Charge on the inner surface of the shell is:

  -5 C
• A point charge +5 C is positioned in the center of a hollow metallic shell of radius R. Shell itself carries charge -2C. Charge on the outer surface of the shell is:

  +3C