A) 20 N
B) 30 N
C) 60 N
D) 120 N
Correct Answer: C
Solution :
\[F=YA\alpha \Delta t\]\[=2\times {{10}^{11}}\times 3\times {{10}^{-6}}\times {{10}^{-5}}\times (20-10)=60N\]You need to login to perform this action.
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