Physics questions with answers

2,629 multiple-choice questions. Open any question for its answer and explanation.

Questions asked in State PSC and UPSC prelims, by topic. Each topic also has notes to read.

Read the notes: Space →

26. [Figure shown in original text] The planet Mercury is revolving in an elliptical orbit around the sun as shown in the given figure. The kinetic energy of mercury is greatest at the point labelledAsked in UPPCS Prelims 1997
27. Which of the following statements is true for a Satellite moving round the earth with a uniform speed ?Asked in Assistant Conservator of Forest Exam 2019
28. The same side of the moon always faces the earth becauseAsked in Assistant Engineer (Civil) 2018 19 2018
29. A TV tower has a height of 75 m. What is the maximum distance and area upto which this TV transmission can be received ? Take the radius of the earth as 6.4 × 10⁶ m.Asked in Co operative Supervisor & Environment Supervisor (Group C) Exam 2023 · (Group C) Exam 2023
30. LIGO stands forAsked in UPSC NDA 1 2019
31. LIGO experiment confirmed one of the predictions of :Asked in UPSC NDA 1 2024
32. The detection of gravitational wave on 14th September, 2015 by the LIGO collaboration from the merger of two black holes, is the first direct detection of gravitational waves and the first observation of a binary black hole merger.Asked in OPSC CS Prelims 2017
33. Consider the following phenomena : 1. Light is affected by gravity. 2. The Universe is constantly expanding. 3. Matter warps its surrounding space- time. Which of the above is/are the prediction/predictions of Albert Einstein's General Theory of Relativity, often discussed in media ?Asked in UPSC IAS 2018
34. Recently, scientists observed the merger of giant 'blackholes' billions of lightyears away from the Earth. What is the significance of this observation?Asked in UPSC IAS 2019
35. The proposed gravitational-wave observation project in India would be run by the consortium of research institutions known under the English acronymAsked in APPSC Group II Prelims 2016
36. Black holes were predicted byAsked in WBCS Main Paper 4 2019
37. The tail of a comet is directed away from the sun becauseAsked in UPPCS Prelims 1997
38. Consider the following statements: A person in a spaceship located half way between the earth and the sun will notice that the I. Sky is jet black. II. Stars do not twinkle. III. Temperature outside the spaceship is much higher than that on the surface of the earth. Of these statementsAsked in UPPCS Prelims 1996
39. Candle flame burn at Mirco-Gravity:Asked in RPSC RAS Prelims 2007
40. वा™ुमण्डल की सिबसिे Ǔनचली परत है - (1) क्षोभमं - (2) सिमतापमंAsked in JUNIOR ACCOUNTANT AND TRA 2013
41. Consider the following statements: Statement-I: The sunspot number is a measure of the activity on the solar surface. Statement-II: The frequency of solar flares is closely related to the sunspot number.Asked in GS 32 2023 IS DEEO 1505 2024
42. Which of the following regions of the Sun is most directly associated with solar flares?Asked in GS 32 2023 IS DEEO 1505 2024
43. Which part of the Sun is characterized by magnetic fields that can lead to solar flares?Asked in GS 32 2023 IS DEEO 1505 2024
44. What is the primary effect of a solar flare on Earth's ionosphere?Asked in GS 32 2023 IS DEEO 1505 2024
45. Which of the following is a type of solar activity that involves the expulsion of a massive cloud of charged particles and magnetic field from the Sun's corona into space?Asked in GS 32 2023 IS DEEO 1505 2024
46. Which layer of the Sun is the source of most of the light and heat that reaches Earth?Asked in GS 32 2023 IS DEEO 1505 2024
47. Consider the following: 1. Aurora 2. Radio communication disruption 3. Satellite damage 4. Climate change Which of the above are potential effects of solar flares and Coronal Mass Ejections (CMEs) on Earth?Asked in GS 32 2023 IS DEEO 1505 2024
48. What is the main difference between a solar flare and a coronal mass ejection (CME)?Asked in GS 32 2023 IS DEEO 1505 2024
49. Consider the following statements in respect of a jet engine and a rocket: 1. A jet engine uses the surrounding air for its oxygen supply and so is unsuitable for motion in space 2. A rocket carries its own supply of oxygen in the gas from as fuel. Which of the above statements are correct ?Asked in UPPSC Upper Mains 2007
50. Which is the chief heavenly body of solar system?Asked in BPSC Prelims Exam 67th Re Exam