Which of the following are the correct characteristic properties of upthrust ?

(i) the smaller the volume of a body submerged in a liquid, the smaller is the upthrust

(ii) the upthrust acts on the body in an upward direction at the centre of buoyancy

(iii) for the same volume of a body inside a fluid, the less the density of the fluid, greater will be the upthrust

1. (i) & (ii)
2. (i) & (iii)
3. (ii) & (iii)
4. (i), (ii) & (iii)

(i) & (ii)

Reason — Characteristic properties of upthrust :

1. Larger the volume of a body submerged in a fluid, greater is the upthrust.
2. For the same volume of a body inside a fluid, more the density of fluid, greater is the upthrust.
3. The upthrust acts on the body in upward direction at the centre of buoyancy i.e., the centre of gravity of the displaced fluid.