Question
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 
. Which of the following graphs is a straight line?
Solution
B.
According to Hooke's law,
Young's Modulus is given by,
... (i)
V = A xl = constant ... (ii)
From equations (i) and (ii), we have
