A) equal to that on A
B) four times that on A
C) two times that on A
D) half that on A
Correct Answer: B
Solution :
Stress \[=\frac{force}{Area}\,\,\therefore Stress\,\propto \frac{1}{\pi {{r}^{2}}}\] \[\frac{{{S}_{B}}}{{{S}_{A}}}={{\left( \frac{{{r}_{A}}}{{{r}_{B}}} \right)}^{2}}={{(2)}^{2}}\Rightarrow {{S}_{B}}=4{{S}_{A}}\]
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