When a steel wire fixed at one end is pulled by a constant force F at its other end,its length increases by l.Which of these is wrong?

Options :
  1. Work done by the external force is Fl
  2. The elastic potential energy is Fl
  3. The elastic potential energy is Fl/2
  4. The heat produced is equal to half of the elastic potential energy stored in the wire
Answer and Explanation :-

Answer: Option 4


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