A) 360\[\pi \]N
B) 36 N
C) \[36\pi \times {{10}^{5}}N\]
D) \[144\pi \times {{10}^{3}}N\]
Correct Answer: A
Solution :
Using the realtion \[F=\frac{YAl}{L}\] ??(i) Here: \[Y=9\times {{10}^{10}}N/{{m}^{2}},\,\,\,d=4\times {{10}^{-3}}m,\] \[l=0.1%L\] From equation (i), we get \[F=\frac{9\times {{10}^{10}}\times \pi {{(2\times {{10}^{-3}})}^{2}}\times 0.1}{100}\] \[=360\pi N\]You need to login to perform this action.
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