A sphere with radius 2.0 mm carries a 2.0 μC charge. What is the potential difference, VB - VA, between point B 4.0 m from the center of the sphere and point A 6.0 m from the center of the sphere? (The value of k is 9.0x109 N•m2/C2.)
A) 1500 V
B) -0.63 V
C) -1500 V
D) 170 V
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