Multiple Choice
Coulomb's law: One very small uniformly charged plastic ball is located directly above another such charge in a test tube as shown in the figure. The balls are in equilibrium a distance d apart. If the charge on each ball is doubled, the distance between the balls in the test tube would become 
A) 
d.
B) 2d.
C) 4d.
D) 8d.
Correct Answer:
Verified
Correct Answer:
Verified
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