Verification for Gauss's Law A point charge at the center of spherical gauss surface E= 4r8,R Φ。=Ecos0°8=9aS 4π6.R w.- qds .4zR2=9 248，R2+ Verification for Gauss’s Law A point charge at the center of spherical gauss surface dS E 2 4 R q E   o  2 4 cos0 R q dS d E dS o e        o S o o e q R R q R qdS             2 2 2 4 4 4