A) \[y{{x}^{2}}\]
B) \[2\,y{{x}^{2}}\]
C) \[\frac{1}{2}{{y}^{2}}x\]
D) \[\frac{1}{2}y{{x}^{2}}\]
Correct Answer: D
Solution :
Energy stored per unit volume\[=\frac{1}{2}\times \text{Stress}\times \text{Strain}\] \[=\frac{1}{2}\times \text{Young }\!\!'\!\!\text{ s modulus }\times {{\text{(Strain)}}^{\text{2}}}=\frac{1}{2}\times Y\times {{x}^{2}}\]
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