Question

What is the Polar Modulus of a solid circular metal shaft of diameter 8 cm?

• A. $64\pi c{m}^2$
• B. $32\pi c{m}^2$
• C. $16\pi c{m}^2$
• D. $8\pi c{m}^2$

Answer 1

The correct option is B $32\pi c{m}^2$

$\because Z_p=\frac{\pi }{16}\times d^3$

$=\frac{\pi }{16}\times 8\times 8\times 8=32\pi c{m}^3$