Question

In a wire of length L, the increase in its length is `l`. If the length is reduced to half, the increase in its length will be
A. Reduced by half
B. Increase by half
C. Remains same
D. None of these

Answer 1

Correct Answer - B
(a)Here, L=10 cm `=10xx10^(-2) m`
F=100 kgf`=100xx9.8 N`
`therefore`Shearing stress `=(F)/(L^(2))=(100xx9.8)/((10xx10^(-2))^(2))=9.8xx10^(4) Nm^(-2)`