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.

51. If L and R represent inductance and resistance respectively, then the dimensions of $ \frac{L}{R}$ will beAsked in Co operative Supervisor & Environment Supervisor (Group C) Exam 2023 · (Group C) Exam 2023
52. What is the dimensional formula of pressure?Asked in lower devision clerk 2025
53. The least number of six digits, which when divided by 4, 6, 10 and 15, leave same remainder 2 in each case. Then what is the sum of the digits of that number?Asked in GPSC Prelims CSP 1 2023
54. k >= 1666.633... Since k must be an integer, the smallest integer value for k is 1667. The least six- digit number is N = 60 1667 + 2. 60 1667 = 100020. N = 100020 + 2 = 100022. The number is 100022. The sum of the digits of this number is 1 + 0 + 0 + 0 + 2 + 2 = 5. 54. If a clock takes 5 minutes to strike five times at 5 o'clock, then how much time will it take to strike nine times at 9 o'clock at the same speed?Asked in JPSC CS Prelims 2011
55. When a chain is used at a temperature more than the temperature it was calibrated, the error in measured length will beAsked in Civil Engg GA 24 2023 CO 1505 2024
56. A student measures certain lengths using a meter scale having least count equal to 1 mm. Which one of the following measurements is more precise ?Asked in UPSC NDA 2 2019
57. Angstrom is a unit ofAsked in BPSC Prelims Exam 64th
58. 'Light-year' is a unit ofAsked in BPSC Prelims Exam 66th HPPSC HPAS Prelims 2016
59. The size of particles being studied in 'nano- technology' is aboutAsked in UPSC CDS 1 2021
60. The pressure exerted by a 760 mm column of mercury at 0 °C is known asAsked in UPSC CDS 2 2016
61. One astronomical unit is the average distance betweenAsked in JPSC CS Prelims 2011
62. Light year is a unit ofAsked in JPSC CS Prelims 2024 · RPSC RAS Prelims 1998
63. Light year is a unit for measurement ofAsked in UPSC NDA 1 2018
64. Light year is a unit of measurement ofAsked in UPSC NDA 1 2019
65. Consider the following statements about Light year : Light year is a unit for measurement of very large distances. Light year is a unit for measurement of very large time intervals. Light year is a unit for measurement of intensity of light. Which of the statements given above is/are correct ?Asked in UPSC NDA 1 2021
66. Light year is a measure ofAsked in UPSC NDA 2 2017
67. One light year is :Asked in OPSC CS Prelims 2020
68. One light year is equivalent to roughly how many kilometers?Asked in OPSC CS Prelims 2022
69. Which of the following are units of the pressure ? (A) bar (B) Pa (C) torr (D)atm Choose the correct option :Asked in RPSC RAS Prelims 2024
70. Which of the following pairs is NOT correctly matched? Quantity - S.I. UnitAsked in UPPCS Prelims 2022
71. Which one of the following is a reason why astronomical distances are measured in light- years?Asked in UPSC IAS 2021
72. Light year isAsked in WBPSC CS Prelims 2019
73. Nuclear sizes are expressed in a unit namedAsked in WBPSC CS Prelims 2020
74. Which of the following is not a unit of distance?Asked in WBPSC CS Prelims 2021
75. 'Curie' is unit ofAsked in WBPSC CS Prelims 2022