question_answer

If a prismatic bar be subjected to an axial tensile stress \[\sigma \] then shear stress induced on a plane inclined at \[\theta \] with the axis will be:

A) \[\frac{\sigma }{2}\,\sin 2\theta \]            

B) \[\frac{\sigma }{2}\,\cos 2\theta \]

C) \[\frac{\sigma }{2}\,{{\cos }^{2}}\theta \]                     

D) \[\frac{\sigma }{2}\,{{\sin }^{2}}\theta \]