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: Nuclear Physics →

1. Which of the following elements does not contain neutrons?Asked in BPSC Prelims Exam 64th
2. The number of neutrons in the nucleus of plutonium $(_{94}Pu^{242})$ isAsked in BPSC Prelims Exam 66th
3. The mass number of a nucleus isAsked in BPSC Prelims Exam 67th Cancelled
4. The nucleus of an atom consists ofAsked in BPSC Prelims Exam 67th Re Exam
5. Who proposed the 'Plum Pudding Model' for an atom?Asked in UPSC CDS 1 2017
6. Scattering of α-particles by a thin gold foil suggests the presence ofAsked in UPSC CDS 1 2020
7. Rutherford’s alpha particle scattering experiment on thin gold foil was responsible for the discovery of -Asked in UPSC CDS 2 2019
8. Which one of the following statements about the properties of neutrons is not correct?Asked in UPSC CDS 2 2020
9. Rutherford’s α-particle scattering experiment was responsible for the discovery of:Asked in UPSC Geoscientist 2021 · UPSC NDA 1 2017
10. Mass number of an atom is equal toAsked in KPSC KAS Prelims 2014
11. The nucleus of an atom contain which of the following ?Asked in KPSC KAS Prelims 2015
12. India's future plans for nuclear energy are based on a particular nuclear fuel which is found in plenty in the monazite sands of India's seashore. What is the name of this nuclear fuel ?Asked in MPSC CS Prelims 2012
13. Which of the following properties of atom could be explained correctly by Thompson Model of atom ?Asked in MPSC CS Prelims 2020
14. An atomic number of Tritium is ______.Asked in MPSC CS Prelims 2022
15. Which one of the following conclusions could not be derived from Rutherford's α-particle scattering experiment ?Asked in UPSC NDA 1 2021
16. Which one of the following statements is correct?Asked in UPSC NDA 2 2015
17. The ionization energy of hydrogen atom in the ground state isAsked in UPSC NDA 2 2017
18. Rutherford's alpha-particle ($\alpha$) scattering experiment was responsible for the discovery of which one of the following ?Asked in UPSC NDA 2 2021
19. New elements and rare - earths are discovered and fixed in the periodic table usingAsked in TNPSC CS Prelims 2015
20. According to Moseley's law the frequency of the spectral line in X-ray spectrum varies asAsked in TNPSC CS Prelims 2019
21. Which of the following particles has zero- charge?Asked in UPPCS Prelims 2021
22. The number of neutrons inside the nucleus of the element Uranium-235 isAsked in UPSC CAPF 2019
23. An electron and a photon have same de Broglie wavelength. It implies that they have the sameAsked in UPSC CAPF 2020
24. Neutrpn Was discovered by :Asked in UPPCS Prelims 1995
25. The alpha particle carries two positive charges. Its mass is very nearly equal to that ofAsked in UPPCS Prelims 1996