A point charge (5.0 pC) is located at the center of a spherical surface (radius = 2.0 cm), and a charge of 3.0 pC is spread uniformly upon this surface. Determine the magnitude of the electric field 1.0 cm from the point charge.
A. 0.72 kN/C
B. 0.45 kN/C
C. 0.63 kN/C
D. 0.90 kN/C
E. 0.18 kN/C
Answer: B
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