Electric Field of Point-Charges: A small glass bead has been charged to 1.9 nC. What is the strength of the electric field 2.0 cm from the center of the bead? (k = 1/4??0 = 8.99 × 109 N ? m2/C2)
A. 4.3 × 104 N/C
B. 8.5 × 102 N/C
C. 8.1 × 10-5 N/C
D. 8.5 × 10-7 N/C
Answer: A
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