Copper of fixed volume V is drawn into wire of length I. When this wire is subjected to a constant force F, the extension produced in the wire is Deltall. Which of the following graphs is a straight line ?

Copper of fixed volume V is drawn into wire of length I. When this wir

1.	Copper of fixed volume V is drawn into wire of length I. When this wire is subjected to a constant force F, the extension produced in the wire is Deltall. Which of the following graphs is a straight line ?
Answer» `Delta L` versus `1/l` `Delta l` versus `l ^(2)` `Delta l` versus `(1)/(l ^(2))` `Delta l` versus l Solution :Young.s MODULUS `Y = (Fl )/( A Delta l )` `implies Delta l = (Fl )/( Ay)` But ` V =AL,so A = (V)/(l)` `therefore Delta l = (Fl ^(2))/( YV) PROP l ^(2), F, Y, V` are same `therefore` Graph will be `Delta l to l ^(2).`