The longitudinal extention of any elastic material is very small.In order to have an appericiable change ,the material must be in the form of

Options

A. long thick wire
B. short thick wire
C. long thin wire
D. short thin wire

Answer

C

Explanation

(c) We have `Deltal=(Fl)/(AY)` or `Deltal prop (l)/(A)" "…(i)`
As per the information given in the question , the longitudinal extension of any material of wire is small
`therefore` From Eqn, (i) , `Deltal prop (l)/(A)`
It means that if `Deltal` is small ,then A will be large, which indicated that inorder to have an appreciable change, the material must be in the form of a long wire.