In the question number 55, the ratio of elongation of steel to the copper wires is

Options

A. `(5)/(2)`
B. `(2)/(5)`
C. `(3)/(2)`
D. `(2)/(3)`

Answer

B

Explanation

From Eq.(i), of the above solution,we get `(DeltaL_(S))/(DeltaL_(C)) = (L_(S))/(L_(C)) xx (Y_(C))/(Y_(S))`
Substitution the given values, we get
`(DeltaL_(S))/(DeltaL_(C)) = (1.6 m)/(2.4 m)xx (1.2 xx 10^(11) N m^(-2))/(2 xx 10^(11) N m^(-2)) = (2)/(5)`