Theory of Structures - Engineering

Q1:

Pick up the incorrect statement from the following : The torsional resistance of a shaft is directly proportional to

A modulus of rigidity

B angle of twist

C reciprocal of the length of the shaft

D moment of inertia of the shaft section.

ANS:D - moment of inertia of the shaft section.

Because Torsional resistance is proportional to Polar moment of inertia (J) and has no relation with the moment of inertia (I).