The moment of inertia of a cross section of a beam is $I$ , and the Young's modulus is $E$ . Its flexural rigidity is
A) $E / I$
B) $E I$
C) $I / E$
D) $E I _ { k }$ , where $k$ is the curvature
E) $k / E I$ , where $k$ is the curvature

Question

Quizplus · Accepted Answer

Flexural rigidity of a beam is defined as the product of its Young's modulus (E) and the moment of inertia of its cross section (I), hence $EI$.

The Moment of Inertia of a Cross Section of a Beam