A solid non-conducting sphere of radius R=0.20m carries a uniform volume charge density ρ=5.0×10−8C m−3. Determine the magnitude of the electric field at a point located 0.10 m from the centre of the sphere.
a) 3.8×102N C−1
b) 5.7×102N C−1
c) 1.9×102N C−1
d) 1.9×103N C−1