01
Define: (A) Nuclear fission (B) Nuclear fusion.
🔥 Most repeated · asked 2×
Appeared in RBSE
2024
2023
Chapter 13 · Unit VIII — Atoms and Nuclei · Physics
Nuclei: The Exact Questions RBSE Keeps Asking (Chapter 13)
नाभिक — बार-बार पूछे जाने वाले प्रश्न
Last updated: 5 July 2026
Every RBSE Class 12 Physics board paper from 2013 to 2026 for Nuclei, sorted and tagged so you know exactly which mass-defect, binding-energy-per-nucleon and nuclear-fission/fusion questions to revise first.
10
Free PYQs
15
Total PYQs
2013–26
Years covered
EN+हिंदी
Both mediums
Top 5 most-repeated RBSE Class 12 Physics PYQs — Nuclei
Real previous-year questions with the exact RBSE board years they appeared in. 5 more high-yield questions — including nuclear-density and nuclear-force questions — are in the free PDF.
02
What is meant by mass defect and nuclear binding energy? Draw a graph between mass number and binding energy per nucleon.
⭐ High-weightage derivation
Appeared in RBSE
2022
03
What do you understand by nuclear force? Draw the graph of binding energy per nucleon as a function of mass number and explain it.
⚙️ Core concept
Appeared in RBSE
2025
04
Define mass defect of a nucleus. The binding energy of oxygen (₈O¹⁶) is 127.5 MeV. Find its binding energy per nucleon, and state the value of 1 eV in joules.
📌 Core numerical
Appeared in RBSE
2015
05
From the equation R = R₀·A^(1/3), show that the nuclear matter density is nearly constant (where R₀ is a constant and A is the mass number).
⚙️ Core proof
Appeared in RBSE
2014
5 of 10 free questions previewed
The other 5 are in the free PDF — and all 15 previous-year questions for this chapter are in the full book.
Download your free Chapter 13 PDF (10 Questions)
Get 10 hand-picked previous-year questions from Chapter 13. Every question includes the exam year, marks, and repeat count. Instant download—no signup required.
How Nuclei is examined in RBSE
A quick map of the chapter before you download — so you know what the questions are testing.
If you have gone through the last decade of RBSE Class 12 Physics papers, you will notice Chapter 13 (Nuclei) is tested every year without fail. It belongs to Unit VIII — Atoms and Nuclei and is drawn from a pool of 15 previous-year questions spanning 2013–2026, spread across MCQs, very short, short and long-answer sections. The topics rotate, but the question patterns stay remarkably steady.
This is the shortest chapter in the book — just 15 previous-year questions — so every one of them is worth knowing well. Expect 1-mark openers on mass defect, nuclear fusion, or Einstein's mass-energy relation, and 2 to 3-mark questions on the binding-energy-per-nucleon graph and proving nuclear-matter density is nearly constant.
So the smart way to revise this chapter is not to read it end to end, but to practise the questions RBSE actually repeats. The five questions above — and the ten in the free sample PDF — are taken straight from real board papers and tagged with the exact years they appeared, so you can see for yourself what the full RBSE Physics chapterwise PYQ book offers before you decide to buy it.
Topics Covered in Nuclei (Chapter 13)
The RBSE syllabus sub-topics this chapter's PYQs are drawn from — useful for scoping your revision even if you're not buying the full book.
- ✓ Composition and size of the nucleus
- ✓ Mass-energy relation and mass defect
- ✓ Nuclear binding energy and the binding-energy curve
- ✓ Nuclear fission and fusion
RBSE · PHYSICS · CH.13
What you get in the free PDF
- ✓ 10 real RBSE PYQs from Nuclei
- ✓ Every question tagged with year and marks weightage
- ✓ Repeat-frequency tags so you revise the highest-yield questions first
- ✓ Available in Hindi and English
- ✓ A 10% off coupon toward the full book
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What's inside this chapter in the full book
The ₹59 full book unlocks all 28 tagged previous-year questions for Nuclei — plus all 13 other chapters.
📄
All 15 real PYQs
Every MCQ, VSA, SA and long-answer question for this chapter from RBSE papers 2013–2026 — 15 in total.
🏷️
Tagged & sorted
Each question labelled with year, marks and question type.
🔥
Repeat-priority order
Highest-repeated questions listed first so revision time is spent well.
🇮🇳
Hindi + English
Full bilingual coverage — study in whichever medium you write your exam.
➗
Formula sheet
Quick-reference sheet of every nuclei formula — mass-defect, binding-energy and nuclear-radius formulas.
📅
2026–27 edition
Updated to the latest RBSE board pattern, with access valid for the current 2026–27 exam session.
Frequently asked questions
Define: (A) Nuclear fission (B) Nuclear fusion. (asked in 2023, 2024) is RBSE's most repeated question from this chapter, followed by what is meant by mass defect and nuclear binding energy? Draw a graph between mass number and binding energy per nucleon. Our free PDF tags each question with its exact repeat count.
Yes. Nuclei is a core topic in Unit VIII — Atoms and Nuclei and is tested every year through MCQs, very short, short and long-answer questions in the RBSE Class 12 Physics board paper.
The full RBSE Class 12 Physics Chapter 13 (Nuclei) question bank has 15 previous-year questions from 2013 to 2026 — MCQs, very short, short and long-answer. The free sample PDF gives you 10 of them; the full book has all 15.
Yes. When you request the PDF, choose English, Hindi, or Both — the free sample and the full book are available in both mediums, so you can revise in whichever language matches your school textbook and RBSE board exam medium.
10 real RBSE previous-year questions from this chapter (out of 15 total), each tagged with year, marks, and repeat frequency. Questions only — no solutions — so you can self-test before checking the full solved chapter.
No account or email signup is needed. Just share your name and phone number and the PDF is available to download instantly — no payment and no waiting. Your number is only used to send the download link.
All 14 chapters — RBSE Class 12 Physics
01Electric Charges and Fields
विद्युत आवेश तथा क्षेत्र
02Electrostatic Potential and Capacitanceस्थिरवैद्युत विभव तथा धारिता
03Current Electricityविद्युत धारा
04Moving Charges and Magnetismगतिमान आवेश तथा चुंबकत्व
05Magnetism and Matterचुंबकत्व एवं द्रव्य
06Electromagnetic Inductionवैद्युतचुंबकीय प्रेरण
07Alternating Currentप्रत्यावर्ती धारा
08Electromagnetic Wavesवैद्युतचुंबकीय तरंगें
09Ray Optics and Optical Instrumentsकिरण प्रकाशिकी एवं प्रकाशिक यंत्र
10Wave Opticsतरंग प्रकाशिकी
11Dual Nature of Radiation and Matterविकिरण तथा द्रव्य की द्वैत प्रकृति
12Atomsपरमाणु
13Nucleiनाभिक
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14Semiconductor Electronicsअर्धचालक इलेक्ट्रॉनिकी
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