Nuclei: Class 12 Physics (UP Board) important questions and practice
Nuclei is chapter 13 of 14 in UP Board Class 12 Physics. Below are the topics the paper draws from, the question types that come up again and again, and a free practice test on this chapter alone.
Topics in this chapter
- Atomic masses, composition and size of the nucleus
- Mass-energy relation and mass defect
- Nuclear binding energy and the binding energy per nucleon curve
- Nuclear force and its characteristics
- Nuclear fission and nuclear fusion (energy generation in stars)
- Radioactivity (law of decay, half-life) removed in CBSE but retained in some state boards
What examiners usually ask
- Draw the binding energy per nucleon versus mass number curve and explain how it accounts for the release of energy in fission and fusion
- Calculate the binding energy per nucleon of 56Fe given the masses of the proton, neutron and the iron nucleus
- State three characteristics of the nuclear force
Exam tip
The BE/A curve (peak near A = 56 at about 8.75 MeV, flat between 30 and 170) with its explanation of fission and fusion is the chapter's main 3-5 mark question; carry 1 u = 931.5 MeV for every mass-defect numerical.
Nuclei on other boards and exams
Frequently asked questions
What are the important questions from Nuclei for UP Board Class 12?
The question types listed above repeat most often in UP Board Class 12 Physics papers for this chapter. Practise them with the chapter test and then attempt them inside a full previous-year paper under time.
Is Nuclei in the UP Board Class 12 Physics syllabus?
Yes. Nuclei is part of the current UP Board Class 12 Physics syllabus, as listed on this site from the prescribed textbook.
Can I practise Nuclei MCQs in Hindi?
Yes. The chapter test and explanations are available in Hindi and English, with an AI doubt solver for any question.