After performing this experiment, the learner will be able to:

• Understand the principle and significance of torsion testing of engineering materials.
• Study the behaviour of circular shafts subjected to twisting moments (torque).
• Measure the angle of twist produced due to an applied torque.
• Plot and interpret the torque–twist relationship of the material.
• Determine the Modulus of Rigidity (Shear Modulus) of the material.
• Verify the torsion equation for circular shafts within the elastic limit.
• Understand the variation of shear stress across the cross-section of a shaft.
• Relate the experimental results to the design of shafts, axles, drive systems, and other torque-transmitting machine components.