9 x 10-13m
9 x 10-7m
9 x 10-3m
9 x 107m
Correct answer is B
C = \(\frac {\varepsilon_o\ A}{d}\)
10-2 x 10-6 = \(\frac {9 \times 10 ^{-12}}{d}\) x 10-4
= 9 x 10-7m
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