With the increase in the density of a fluid, the upthrust is experienced by a body immersed in it.

decreases

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increases

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remains same

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none of the above

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Solution

The correct option is B
increases

When an object is partially or wholly immersed in a fluid, an upward thrust acts on it.
This upward thrust is directly proportional to the density of fluid, i.e., more the density of fluid, more is the upthrust and vice versa.
Upthrust by a liquid on an object is calculated as -
$U p t h r u s t = V o l u m e o f t h e o b j e c t \times d e n s i t y o f t h e l i q u i d \times g r a v i t a t i o n a l a c c e l e r a t i o n$
Therefore, if the density of the fluid increases then the upthrust also increases.
Hence, the correct answer is option (B) i.e. increases

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Similar questions

A body of volume 100 $c m^{3}$ weighs 5 kgf in air. It is completely immersed in a liquid of density 1.8 $\times 10^{3} k g m^{- 3}$ . Find :
(i) the upthrust due to liquid and
(ii) the weight of the body in liquid.
(iii) the upthrust on the body.
State the assumption made in part (i).

Write true or false for each statement:

(a) Equal volumes of the two different substances have equal masses.

(b) The density of a piece of brass will change by changing its size or shape.

(d) Relative density of water is 1.0.

(e) Relative density of a substance is expressed in g $c m^{-} 3$ .

(f) When a body is immersed in a liquid, the buoyant force experienced by the body is equal to the volume of the displaced by it.

(g) A body experiences the same buoyant force while floating in water or alcohol.

(h) A body experiences the same buoyant force when it floats or sinks in water.

(i) A body floats in a liquid when its weight becomes equal to the weight of the liquid displaced by its submerged part.

(j) A body while floating sinks in a liquid of low density than in high density.

The upward force experienced by a body immersed partially or fully in a fluid is called_________

Q. a body of volume 100cm3 is completely immersed in water.calculate the upthrust on the body.
density of water=1000kg/m3

Archimedes' Principle states that when a body is totally or partially immersed in a fluid, the upthrust is equal to :

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