Question

The torque required to produce a unit twist in a solide bar of length `L` and radius `r` is
A. `tau_(1) = tau_(2)`
B. `tau_(1) lt tau_(2)`
C. `tau_(1) gt tau_(2)`
D. `1 & 2` are correct

Answer 1

Correct Answer - C
`tau_("hollow") gt tau_("solid"), tau = (pi eta r^(4) Phi)/(2l)`