UPSC CSE · Science and Technology
UPSC Prelims Physics Questions (Science and Technology): PYQs with Answers
17 UPSC Prelims questions on Physics (Science and Technology) from 2011–2026, newest first. 2013 had the most (5). Difficulty: 18% easy, 53% medium and 29% hard.
- Nobel Physics 2025 John ClarkeX', born in the UK, was conferred the Nobel Prize in 2025. He was a professor in an American university when this prize was announced. Identify 'X':
- Giant Stars LifespanConsider the following statements:
- Pressure Cooker TemperatureIn a pressure cooker, the temperature at which the food is cooked depends mainly upon which of the following?
- Sodium vs LED LampsWith reference to street-lighting, how do sodium lamps differ from LED lamps?
- Black Hole Merger Gravitational WavesRecently, scientists observed the merger of giant 'blackholes' billions of light-years away from the Earth. What is the significance of this observation?
- General Relativity PredictionsConsider the following statements:
- Event Horizon String TheoryThe terms ‘Event Horizon’, ‘Singularity’, ‘String Theory’ and ‘Standard Model’ are sometimes seen in the news in the context of
- Icecube Neutrino DetectorIn the context of modern scientific research, consider the following statements about 'IceCube', a particle detector located at South Pole, which was recently in the…
- Ball Bearings FrictionBall bearings are used in bicycles, cars, etc., because:
- Optical Illusions Sun MoonConsider the following statements:
- Rainbow FormationRainbow is produced when sunlight falls on drops of rain. Which of the following physical phenomena are responsible for this?
- Fundamental Forces GravityThe known forces of nature can be divided into four classes, viz., gravity, electromagnetism, weak nuclear force and strong nuclear force. With reference to them, which…
- Higgs BosonThe efforts to detect the existence of Higgs boson particle have become frequent news in recent years. What is/are the importance/importances of discovering this…
- Expanding Universe EvidenceWhich of the following is/are cited by the scientists as evidence/evidences for the continued expansion of universe?
- Capillarity ApplicationsConsider the following statements:
- Satellite Orbital MotionAn artificial satellite orbiting around the Earth does not fall down. This is so because the attraction of Earth
- Frozen Lake Bottom WaterThe surface of a lake is frozen in severe winter, but the water at its bottom is still liquid. What is the reason?