Question

Overall changes in volume and radii of a uniform cylindrical steel wire are $0.2\%$ and $0.002\%$ respectively when subjected to some suitable force. Longitudinal tensile stress acting on the wire is $\left(Y=2.0\times {10}^{11}N{m}^{-2}\right)$

• A. $3.2\times {10}^{9}N{m}^{-2}$
• B. $3.2\times {10}^{7}N{m}^{-2}$
• C. $0.392\times {10}^{9}N{m}^{-2}$
• D. $3.6\times {10}^{7}N{m}^{-2}$

Answer 1

The correct option is C $0.392\times {10}^{9}N{m}^{-2}$