MCQ
On stretching a wire, the elastic energy stored per unit volume is
- ✓$Fl/2AL$
- B$FA/2L$
- C$FL/2A$
- D$FL/2$
✓
Answer
Correct option: A.
$Fl/2AL$
a
(a) Energy stored per unit volume $=$ $\frac{1}{2}\left( {\frac{F}{A}} \right)\;\left( {\frac{l}{L}} \right)$ $=$ $\frac{{Fl}}{{2AL}}$
(a) Energy stored per unit volume $=$ $\frac{1}{2}\left( {\frac{F}{A}} \right)\;\left( {\frac{l}{L}} \right)$ $=$ $\frac{{Fl}}{{2AL}}$
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