A wire fixed at the upper end stretches by length $l$ by applying a force $F$. The work done in stretching is
A wire fixed at the upper end stretches by length $l$ by applying a force $F$. The work done in stretching is
- [AIEEE 2004]
- A
$\frac{F}{{2l}}$
- B
$Fl$
- C
$2Fl$
- D
$\frac{{Fl}}{2}$
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