Question

The upper end of a wire of radius 4 mm and length 100 cm is clamped and its other end is twisted through an angle of ${30}^o$. Then angle of shear is

• A. ${12}^o$
• B. ${0.12}^o$
• C. ${1.2}^o$
• D. ${0.012}^o$

Answer 1

The correct option is B

${0.12}^o$

Angle of shear $\varphi =\frac{r\theta }{L}=\frac{4\times {10}^{-1}}{100}\times {30}^o={0.12}^o$