A Hollow Conducting Spherical Shell Has Radii of 0

Multiple Choice

A hollow conducting spherical shell has radii of 0.80 m and 1.20 m, as shown in the figure. The sphere carries a net excess charge of -500 nC. A point charge of +300 nC is present at the center. (k = 1/4πε0 = 8.99 × 10⁹ N ∙ m²/C) The radial component of the electric field at a point that is 0.60 m from the center is closest to

A) zero.
B) +5000 N/C.
C) +7500 N/C.
D) -5000 N/C.
E) -7500 N/C.