A) \[\frac{F}{2l}\]
B) \[Fl\]
C) \[2Fl\]
D) \[\frac{Fl}{2}\]
Correct Answer: D
Solution :
Work done in stretching the wire = potential energy stored \[=\frac{1}{2}\times stress\times strain\times volume\] \[=\frac{1}{2}\times \frac{F}{A}\times \frac{l}{L}\times AL\] \[=\frac{1}{2}Fl\]You need to login to perform this action.
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