M.I of circular section

According to Hook's law, which one is wrong ?

The influence line diagram for BM at a section of a simply supported beam will be a

Which of the following end conditions permits the displacement in any direction and also rotation

Find the bending moment at fixed end of cantilever as shown in fig.

At the yield point of a steel test piece:

Plasticity of a body is

Along the neutral axis of a simply supported beam

The moment of inertia of rectangular section is