A) \[3\times {{10}^{-4}}\,N\]
B) \[4\times {{10}^{-4}}\,N\]
C) \[5\times {{10}^{-4}}\,N\]
D) \[6\times {{10}^{-4}}\,N\]
Correct Answer: C
Solution :
\[T=\sqrt{{{(mg)}^{2}}+{{(QE)}^{2}}}\] \[=\sqrt{{{(30.7\times {{10}^{-6}}\times 9.8)}^{2}}+{{(2\times {{10}^{-8}}\times 20000)}^{2}}}\]\[=5\times {{10}^{-4}}N\]You need to login to perform this action.
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