8.
r = distance between the two charges = 2 m
d = distance of the point from 1 uC
for the electric field to vanish at the point
E1 = E2
k Q1/d2 = k Q2/(r - d)2
1/d2 = 8/(2 - d)2
d = 0.522 m
Breakdown Field (drawn from the text by Giancoli) Dry spo concentric with the sphere. In particular,...
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