A) 500
B) 50
C) 5
D) 0
Correct Answer: C
Solution :
\[QE=mg\Rightarrow Q=\frac{mg}{E}\Rightarrow n=\frac{mgd}{Ve}\] \[\Rightarrow n=\frac{1.8\times {{10}^{-14}}\times 10\times 0.9\times {{10}^{-2}}}{2\times {{10}^{3}}\times 1.6\times {{10}^{-19}}}=5\]You need to login to perform this action.
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