Q.

What are the units of torsional rigidity?

A. nmm2
B. n/mm
C. n-mm
D. n
Answer» A. nmm2
Explanation: the product of modulus of rigidity (c) and polar moment of inertia (j) is called torsional rigidity. torsional rigidity is a torque that produces a twist of one radian in a shaft of unit length.
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