Question

The Young's modules of the material of a wire is $6\times {10}^{12}N/m^2$ and there is no transverse strain in it , then its modules of rigidity will be

• A. $3\times {10}^{12}N/m^2$
• B. $2\times {10}^{12}N/m^2$
• C. ${10}^{12}N/m^2$
• D. None of these

Answer 1

Answer: (A)

$3\times {10}^{12}N/m^2$

$\eta =\frac{Y}{2(1+\sigma )},\sigma =0$
$\eta =\frac{Y}{2}=\frac{6\times {10}^{12}}{2}$
$3\times {10}^{12}N/m^2$