Multiple Choice
A point charge of +35 nC is above a point charge of -35 nC on a vertical line. The distance between the charges is 4.0 mm. What are the magnitude and direction of the dipole moment 
?
A) zero
B) 1.4 pC · m up
C) 1.4 pC · m down
D) 2.8 pC · m up
E) 2.8 pC · m down
Correct Answer:
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