A) 8
B) 6
C) 0.1
D) 3
Correct Answer: D
Solution :
[d] In equilibrium, \[F=qE=\left( ne \right)\frac{V}{d}=mg\] \[n=\frac{mgd}{eV}=\frac{1.96\times {{10}^{-15}}\times 9.8\times 0.02}{1.6\times {{10}^{-19}}\times 800}=3\]You need to login to perform this action.
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