Other Simulations: Electric Flux & Gauss's Law
The simulation below integrates the electric field for a number of protons evenly distributed over the surface of a spherical shell.
As you drag the observation point (white sphere) for the electric field, the two charged dome sections of the shell on either side of the observation point and their respective electric fields are shown in BLUE and YELLOW, and the net electric field is shown in GREEN.
Inside a truly spherically symmetric body, the electric field of the charged domes should cancel and the Enet should be ZERO EVERYWHERE inside the shell according to the results of Gauss's law. However, due to the finite number of protons in the simulation, the net electric field inside the shell is not precisely zero, but you'll find that it's so small compared to the individual electric fields of each dome that the green arrow representing Enet is hardly ever visible inside the shell. Outside of the charged shell, the shell will behave more like a point charge whose total charge is the entire shell's charge and Enet is not zero.