A) \[7.7\times {{10}^{-13}}Nm\]
B) \[3.855\times {{10}^{-13}}Nm\]
C) \[3.855\times {{10}^{-15}}Nm\]
D) \[7.7\times {{10}^{-15}}Nm\]
Correct Answer: B
Solution :
[b] \[\tau =\left( 2.57\times {{10}^{-17}}Cm \right)\left( 3.0\times {{10}^{4}}\frac{N}{C} \right)\left( \frac{1}{2} \right)\] \[=3.855\times {{10}^{-13}}Nm.\]You need to login to perform this action.
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