ANS:A -

The maximum shear stress (q) in a reinforced concrete (RC) beam can be calculated using the formula for shear stress. In RC beams, shear stress typically occurs at the critical sections near the supports, where the shear force is the highest. The formula to calculate the maximum shear stress (q) in a reinforced concrete beam is given by: q=bdV​ Where:

• V is the shear force at the critical section,
• b is the width of the beam, and
• d is the effective depth of the beam.

This formula represents the shear force per unit area of the beam's cross-section. It assumes that the shear force is uniformly distributed across the width of the beam. It's important to note that in RC beams, shear stress is typically checked against the shear capacity of the beam, which is determined based on various factors including concrete strength, beam dimensions, and the presence of shear reinforcement such as stirrups or shear links. Therefore, to determine the maximum shear stress (q) in a specific RC beam, you would need to know the shear force (V) at the critical section, as well as the dimensions of the beam (width b and effective depth d). Once these values are known, you can calculate the shear stress using the formula provided above.