Two solid blocks of identical size are submerged in water. One block is iron and the other is aluminium. Upon which is the buoyant force greater?

The iron wires of equal length are taken. One of them is thick and the other is thin. In which case will young's modulus be greater?

A flat disc, a solid cube and a solid sphere of equal mass made of the same material are completely immersed in water. Which one of them will experience the minimum and which one will experience the maximum buoyant force?

Two spheres have equal masses and their external radii are the same. One of them is solid and the other hollow. Which one will have a greater radius of gyration?

Two closed containers of equal weight and size are to be dipped into water up to the same depth. There is a hole at the bottom of one of the containers through which water can enter it. For which container, more work has to be done?

Two bodies of identical size but made of different materials remain immersed completely in water. One of them remains suspended with the help of a thread and the tension acting on that thread is 500gxxg . The other is anchored to the bottom of the vessel by a thread so that it cannot float up and the tension acting on this thread is 12.5gxxg . If the volume of each body is 50cm^(3) , then determine the mass and density of each body.

Two identical loops, one of copper and the other of aluminium are rotated with the same angular speed in the same magnetic field, compare current produced in the two coils. Justify your answer.

Two identical loops, one of copper and another of constantan, are removed from a magnetic field within the same time interval. In which loop will the induced current be greater?

Two samples of hard water contain same cations, Ca^(2+) & Mg^(2+) . One is marked as temporary and the other as permanent. In which respect do they differ?