A Hollow Conducting Spherical Shell Has Radii of 0

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.

Correct Answer:

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