चुंबकत्व एवं द्रव्य — बार-बार पूछे जाने वाले प्रश्न
Last updated: 5 July 2026
Every RBSE Class 12 Physics board paper from 2013 to 2026 for Magnetism and Matter, sorted and tagged so you know exactly which diamagnetic-substance, hysteresis-curve and magnetic-declination questions to revise first.
Real previous-year questions with the exact RBSE board years they appeared in — each with its full board solution. 5 more high-yield questions — including permanent-magnet and torque questions — are in the free PDF.
What are diamagnetic substances? Give one example.
प्रतिचुम्बकीय पदार्थ किसे कहते हैं ?
🔥 Most repeated · asked 2×substances which are not attracted but repelled by magnet is called diamagnetic substances
Example.copper
All solved questions for this chapter are in the full RBSE Physics PYQ book.
Define angle of declination (magnetic declination). In the magnetic meridian of a certain place, the horizontal component of earth's magnetic field is 0.25 gauss and the dip angle is 60°. Find the value of earth's magnetic field at this place.
दिक्पात कोण (चुम्बकीय दिक्पात) की परिभाषा लिखिए। किसी स्थान के चुम्बकीय याम्योत्तर में पृथ्वी के चुम्बकीय क्षेत्र का क्षैतिज अवयव 0.25 गाउस है एवं नमन कोण 60° है। इस स्थान पर पृथ्वी के चुम्बकीय क्षेत्र का मान ज्ञात कीजिए।
⚙️ Core numericalthe angle between the geographical meridian and the magnetic at that location
BH = B.COSX
B = 0.25/COS60
B= 0.50 Gauss
All solved questions for this chapter are in the full RBSE Physics PYQ book.
Write two characteristics of the material used to construct a permanent magnet. Give two examples of such materials.
स्थायी चुम्बक बनाने के लिए पदार्थ की दो विशेषताएँ लिखिए। ऐसे पदार्थों के दो उदाहरण दीजिए।
📌 Frequently examinedCharacteristics of Permanent Magnet Material (Hard Magnets)
The material must have high retentivity (to remain magnetized) and high coercivity (to resist demagnetization)
Examples of Permanent Magnet Materials
Steel and Alnico (Alloy of Al, Ni, Co)
All solved questions for this chapter are in the full RBSE Physics PYQ book.
The magnetic moments of two bar magnets are M₁ and M₂. If the angle between them is θ, write the value of the resultant magnetic moment. Also explain why soft iron is used in making electromagnets.
(A) दो दण्ड चुम्बकों के चुम्बकीय आघूर्ण M₁ तथा M₂ हैं। यदि इनके मध्य कोण θ हो तो परिणामी चुम्बकीय आघूर्ण का मान लिखिए। (B) विद्युत चुम्बक बनाने में नर्म लोहे का उपयोग क्यों करते हैं ?
⭐ High-weightage(a) MR=√(M12+M22+2M1M2cosθ)
(b) Soft iron is used in making electro-magnets. Why ? Ans: Due to high permeability(easily get magnetised ) and low retentivity ,soft iron is used in electro magnet
All solved questions for this chapter are in the full RBSE Physics PYQ book.
Draw the hysteresis curve (B–H curve) for a ferromagnetic substance.
एक लौहचुम्बकीय पदार्थ के लिए शैथिल्य वक्र (B-H वक्र) बनाइये।
⚙️ Core diagram
All solved questions for this chapter are in the full RBSE Physics PYQ book.
The other 5 are in the free PDF — and all 19 previous-year questions for this chapter are in the full book.
Get 10 hand-picked previous-year questions from Chapter 5. Every question includes the exam year, marks, and repeat count. Instant download—no signup required.
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 5 (Magnetism and Matter) is tested every year without fail. It belongs to Unit III — Magnetic Effects of Current and Magnetism and is drawn from a pool of 19 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.
Expect a quick 1-mark opener on classifying diamagnetic, paramagnetic or ferromagnetic substances, or drawing the hysteresis (B–H) curve. The 2-mark questions lean on magnetic declination numericals and the properties needed to make a permanent magnet. Being a short chapter, it does not carry a long-answer derivation every year, which makes the repeated short-answer questions especially worth mastering.
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.
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.
"Chapter 5 chhota hai but hysteresis curve wala question har paper mein ghoomta rehta hai."
"10 questions ka free sample mila, diamagnetic-paramagnetic wale concept clear ho gaye."
"Year-wise tags dekh kar revision plan banana easy ho gaya. Poora 14-chapter book bhi le liya sirf ₹59 mein, paisa vasool."
The ₹59 full book unlocks all 19 tagged previous-year questions for Magnetism and Matter — plus all 13 other chapters.
Every MCQ, VSA, SA and long-answer question for this chapter from RBSE papers 2013–2026 — 19 in total.
Each question labelled with year, marks and question type.
Highest-repeated questions listed first so revision time is spent well.
Full bilingual coverage — study in whichever medium you write your exam.
Quick-reference sheet of every magnetism and matter formula — magnetic moment, torque on a magnetic needle, declination and susceptibility formulas.
Updated to the latest RBSE board pattern, with access valid for the current 2026–27 exam session.
One booklet, every chapter, tagged and sorted by repeat priority — in English and Hindi.
See full book — ₹59 →