For the 2000 equipotential surface:
V = 2000 V
k = 9.0 × 10-9 C
Q = 25 nC (10-9C/1nC) = 25 × 10-9 C
A +25 nC charge is at the origin.
How much farther from the charge is the 2000 V equipotential surface than the 3000 V surface?
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