A 5.0-nC point charge is embedded at the center of a nonconducting sphere (radius = 2.0 cm) which has a charge of ?8.0 nC distributed uniformly throughout its volume. What is the magnitude of the electric field at a point that is 1.0 cm from the center of the sphere?
A. 1.8 × 105 N/C
B. 9.0 × 104 N/C
C. 3.6 × 105 N/C
D. 2.7 × 105 N/C
E. 7.2 × 105 N/C
Answer: C
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