NEET2014PhysicsMechanical Properties of SolidsActual
Copper of fixed volume V is drawn into wire of length l . When this wire is subjected to a constant force F , the extension produced in the wire is ∆ l . Which of the following graph is a straight line?
Options
- A∆ l versus 1 / l
- B∆ l versus l 2
- C∆ l versus 1 / l 2
- D∆ l versus l
Correct answer
B. ∆ l versus l 2
Step-by-step solution
V = A l Y = F / A ∆ l l Y ∆ l l = F A ∆ l = F l Y A = F Y . l l V ∆ l = F Y V l 2 ∆ l ∝ l 2