According to Archimedes' principle, when a body is submerged in a liquid, its apparent weight ______.

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decreases

increases

remains unchanged

may increase or decrease depending on the material of the body

answer is A.

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Detailed Solution

According to Archimedes' principle, If a body is wholly or partially submerged in a fluid at rest it is acted upon by an upthrust buoyant force in the upward direction whose magnitude is equal to the weight of the fluid displaced by the body.
As a result, there are two forces acting on the body when it is submerged in fluid, a gravitational force acting downwards and an upthrust acting upwards.
Therefore, the apparent weight of the body reduces and is equal to the

Apparent weight = Actual weight of the body - Upthrust

Therefore, we can say that the apparent weight of an object decreases when it is submerged in a fluid.

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