- Work done by the external force is Fl
- The elastic potential energy is Fl
- The elastic potential energy is Fl/2
- The heat produced is equal to half of the elastic potential energy stored in the wire

Answer: Option 4

Explanation:

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You'll forget it when you're dead, and so will I. When I'm dead, I'm going to forget everything-and I advise you to do the same.

-Kurt Vonnegut
Cat's Cradle