railway RRB JE (CBT I + CBT II) Mock Test 2024 Strength of Materials Torsion of Shaft Effect on Shaft
The value of J in equation
\(\frac{T}{J} = \frac{{{S_s}}}{y} = \frac{{G\theta }}{l}\)
for a circular shaft of diameter d is
1
\(\frac{{\pi {d^3}}}{{32}}\)
2
\(\frac{{\pi {d^4}}}{{32}}\)
3
\(\frac{{\pi {d^4}}}{{64}}\)
4
\(\frac{{\pi {d^3}}}{{16}}\)