Question

Three thin wires of equal length are suspended from the top of a roof. The respective ratio of their area of cross section is $1 : 2 : 4$ and Young?s modulii is $4 : 2 : 1$, then the ratio of their weights to be attached at the other ends to obtain same elongation in them is

• A. $1 : 1 : 1$
• B. $1 : 2 : 4$
• C. $4 : 2 : 1$
• D. $2 : \sqrt{2} : 1$

Answer 1

Answer: (A)

$1 : 1 : 1$

Answer 2

Answer (a) $1 : 1 : 1$