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: Electric Current →

26. Statement-I: In our houses, the current in AC electricity line changes direction 60 times per second. Statement-II: The frequency of alternating voltage supplied is 60 hertz.Asked in UPPCS Prelims 2004
27. Alternating current is Not suitable for:Asked in RPSC RAS Prelims 1995
28. A magnetic field can be produced byAsked in WBCS Main Paper 4 2023
29. Which of the following is a vector quantity?Asked in WBCS Main Paper 4 2023
30. In electromagnetic theory, continuity equation relates _____.Asked in WBCS Main Paper 4 2019
31. Q94: Unit of electric current is -Asked in Asstt. Jailor 2013
32. A current of 2 A is drawn by an electric device for 5 minutes. The amount of electric charge that flows through the circuit is :Asked in Clerk GR II Comb. Comp. Exam 2013
33. The device used for producing electric current is called :Asked in Clerk GR II Comb. Comp. Exam 2013
34. ͪवद्™ुत धारा का मात्रक हैAsked in JUNIOR ACCOUNTANT AND TRA 2013
35. Ǔनम्नͧलͨखित में सिे ͩकसि घरेलू उपकरण में ͪवद्™ुत धारा का उप™ोग नहीं होता है ?Asked in JUNIOR ACCOUNTANT AND TRA 2013
36. Unit of electric current isAsked in JUNIOR ACCOUNTANT AND TRA 2013
37. Which of the following house-hold appliances does not use electric current ?Asked in JUNIOR ACCOUNTANT AND TRA 2013
38. The force per unit charge is known asAsked in ae 2024
39. If $10^9$ electrones move out of a body to mother body every second how much time it requires to get a 1 coulomb charge on the other body? [Given that ; $1yr \approx 3 \times 10^7$ sec]Asked in Assistant Engineer (AE) Exam 2013
40. Sound : Vibration :: Electricity : ?Asked in moter vehicle inspector
41. A solid sphere made of insulating material has a radius $R$ and has a total charge $Q$ distributed uniformly in its volume. What is the magnitude of electric field intensity $E$, at a distance $r$ ($0Asked in GS&EI ElectEngg 14 2024 1601 2025
42. A solid sphere made of insulating material has a radius R and has a total charge Q distributed uniformly in its volume. What is the magnitude of electric field intensity $E$, at a distance $r$ ($0 < r < R$) inside the sphere?Asked in GS&EI ElectEngg 14 2024 1601 2025
43. The device used to produce electric current is called :Asked in Junior Assistant Exam 2022
44. A diode can be used toAsked in Lower Subordinate Service Examination 2021
45. In India, distribution of electricity for domestic purpose is done in the form of— [A] 220 V; 50 Hz [B] 110 V; 60 Hz [C] 220 V; 60 Hz [D] 110 V; 50 HzAsked in POST GRADUATE TEACHER (PGT) 2018
46. An electron and a proton starting from rest get accelerated through potential difference of 100 kV. The final speeds of the electron and the proton are V$_e$ and V$_p$ respectively. Which one of the following relations is correct?Asked in UPSC CDS 1 2019
47. An electron and a proton starting from rest are accelerated through a potential difference of 1000 V. Which one of the following statements in this regard is correct?Asked in UPSC CDS 2 2017
48. With reference to the electron drift speed in a current-carrying conductor, which one of the following statements is correct?Asked in UPSC Geoscientist 2022
49. Ions in a solution are subject to a uniform electric field. If each ion carries charge q and has radius R, then the ionic current I due to the applied field will depend on q and R as :Asked in UPSC Geoscientist 2024
50. If a charged particle (+q) is projected with certain velocity parallel to the magnetic field, then it willAsked in UPSC NDA 1 2015