Physics: Mechanics: UPSC Previous Year Questions (Science and Technology)
1 previous year UPSC Prelims question on Physics: Mechanics (Science and Technology). Choose an option to see the answer and explanation.
Explanations state facts as of the year each question was asked; words like “recently” refer to that year.
Showing 1–1 of 1 question
UPSC 2004Science and Technology · Physics: Mechanics
Q1. A weightless rubber balloon is filled with 200 cc of water. Its weight in water is equal to:
Explanation
The question is based on the principle of buoyancy, which means that an object fully or partly immersed in fluid experiences an upthrust or buoyant force equal to the weight of the fluid displaced. When a weightless balloon filled with water is immersed into water, it displaces an amount of water equivalent to its own volume, in this case, 200 cc. The weight of this displaced water in terms of gravitational pull is equal to the weight of the balloon under these conditions. Since both weights are identical (as the balloon is also filled with water), they cancel out each other, resulting in a net weight of the balloon in water to be zero.
Answer key for these questions
Q
UPSC year
Correct answer
1
2004
(d) zero
Frequently asked questions
How many previous year UPSC questions are there on Physics: Mechanics?
This page covers 1 previous year UPSC Prelims GS Paper-I questions on Physics: Mechanics (Science and Technology), asked from 1997 to 2004. Each has the correct answer and an explanation.
How should I use previous year UPSC questions for Prelims?
Attempt each question first, then open the answer and read the explanation for every option. Repeat by chapter, and track which statements UPSC reuses across years. Previous year questions show the exam pattern and difficulty level.
Which years are covered for Physics: Mechanics?
Questions on Physics: Mechanics (Science and Technology) are available for 7 years, from 1997 to 2004. Use the Year filter to practise a single paper.
