3. Ab and Ac are the cross sections of bronze and copper bars of equal length, ?b, ?c are their respective stresses due to load P. If Pb and Pc are the loads shared by them, (where Eb and Ec are their modulii).
5. A simply supported beam A carries a point load at its midspan. An other identical beam B carries the same load but uniformly distributed over the entire span. The ratio of the maximum deflections of the beams A and B, will be
9. The ratio of the length and depth of a simply supported rectangular beam which experiences maximum bending stress equal to tensile stress, due to same load at its mid span, is