Question

When a wire is subjected to a force along its length, its length increases by $0.4$% and its radius decreases by $0.2$ %. Then the Poisons ratio of the material of the wire is

• A. $0.8$
• B. $0.5$
• C. $0.2$
• D. $0.1$

Answer 1

The correct option is B $0.5$

Poison's ratio $=\frac{\Delta d/d}{\Delta r/r}$
$=\frac{0.2/100}{0.4/100}$
$=\frac{1}{2}=0.5$