For a uniformly charged solid non-conducting sphere of radius R carrying a total charge Q:
- Inside the sphere (r<R): The electric field is directly proportional to the distance from the center. Using Gauss's Law, the field is given by E=4πε01R3Qr. Thus, E∝r, which represents a straight line passing through the origin.
- At the surface (r=R): The field reaches its maximum value, E=4πε01R2Q.
- Outside the sphere (r≥R): The sphere behaves like a point charge concentrated at the center. The electric field follows the inverse square law: E=4πε01r2Q. Thus, E∝r21, which represents a hyperbola.
The correct graph must show a linear increase from the origin to r=R and a hyperbolic decrease for r>R.