Correct option is C
The stresses caused by the bending moment in a beam or structural member are called flexural stresses. These stresses arise due to the bending of the material and vary along the cross-section of the beam. Flexural stress can be either tensile or compressive depending on the position in the beam section (tensile on the bottom side and compressive on the top side in the case of a bending moment).
Explanation of Options:
1. Shear stress:
Shear stress is caused by forces acting parallel to the surface, not by a bending moment.
2. Compressive stress:
While compressive stress can occur due to bending (on the side of the beam facing the compression), it is not the name for the stress caused by the bending moment itself.
3.Flexural stress:
Flexural stress is the stress due to the bending moment in a beam or structural element, which causes both tensile and compressive stresses depending on the location of the cross-section.
4. Tensile stress:
Tensile stress occurs when the material is being stretched or pulled apart, which can be a part of the flexural stress, but it does not fully describe the stress due to a bending moment.
