Question

1. Three spheres of different radii have the same amount of net charge Q uniformly distributed over the volume of spheres (spheres are non-conducting). The sphere #1 has radius R/2; sphere #2 has radius R; sphere #3 has radius 2R. Rank electric fields created by each sphere at the distance R from the center, greatest first.
   1. 1>2>3
   2. 1=2>3
   3. 3>2>1
   4. 1=2=3
   5. 3>2=1

Answer is 1=2>3, please explain why!

Answer 1

The ranking of electric field by spheres with different radius