A) \[3\times {{10}^{-4}}C\]
B) \[3\times {{10}^{-3}}C\]
C) \[3\times {{10}^{-2}}C\]
D) \[3\times {{10}^{-1}}C\]
Correct Answer: B
Solution :
By using \[E=9\times {{10}^{9}}\times \frac{Q}{{{R}^{2}}}\] Þ \[3\times {{10}^{6}}=9\times {{10}^{9}}\times \frac{Q}{{{(3)}^{2}}}\] Þ \[Q=\text{ }3\times {{10}^{3}}C\]You need to login to perform this action.
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