Select the correct relationship for a shaft of uniform circular cross-section.
1
Torsional Rigidity = Modulus of Rigidity * Polar moment of Inertia
2
Torsional Rigidity = Modulus of Rigidity - Polar moment of Inertia
3
Torsional Rigidity = Modulus of Rigidity/Polar moment of Inertia
4
Torsional Rigidity = Modulus of Rigidity + Polar moment of Inertia