Spheres of Charge: A metal sphere of radius 2.0 cm carries an excess charge of 3.0 ?C. What is the electric field 6.0 cm from the center of the sphere? (k = 1/4??0 = 9.0 × 109 N ? m2/C2)
A. 4.2 × 106 N/C
B. 5.7 × 106 N/C
C. 6.4 × 106 N/C
D. 7.5 × 106 N/C
E. 9.3 × 106 N/C
Answer: D
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