A) \[8.57\times {{10}^{-6}}\]
B) \[22.5\times {{10}^{-4}}\]
C) \[9.8\times {{10}^{-5}}\]
D) \[45.0\times {{10}^{-5}}\]
Correct Answer: A
Solution :
Energy \[=\frac{1}{2}Fl\] \[=\frac{1}{2}\times F\times \left( \frac{FL}{AY} \right)\] \[=\frac{1}{2}\times \frac{{{F}^{2}}L}{AY}\] \[=\frac{1}{2}\times \frac{{{(50)}^{2}}\times 20\times {{10}^{-2}}}{2\times {{10}^{-4}}\times 1.4\times {{10}^{11}}}\] \[=8.57\times {{10}^{-6}}J\]You need to login to perform this action.
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