गतिमान आवेश तथा चुंबकत्व — बार-बार पूछे जाने वाले प्रश्न
Last updated: 5 July 2026
Every RBSE Class 12 Physics board paper from 2013 to 2026 for Moving Charges and Magnetism, sorted and tagged so you know exactly which Biot–Savart-law, Ampere's-circuital-law and moving-coil-galvanometer questions to revise first.
Real previous-year questions with the exact RBSE board years they appeared in. 5 more high-yield questions — including two more Ampere's-law derivations — are in the free PDF.
Write the formula of Biot-Savart law in vector form. Obtain an expression of magnetic field on the axis of a current-carrying loop. Draw the necessary diagram.
बायो-सावर्ट नियम लिखिए। एक विद्युत धारावाही पाश के अक्ष पर स्थित बिन्दु पर चुम्बकीय क्षेत्र ज्ञात कीजिए। आवश्यक चित्र बनाइए।
🔥 Most repeated · asked 5×Write Ampere's circuital law in mathematical form. Draw a diagram and derive an expression for the magnetic field on the axis of a current-carrying solenoid.
एम्पियर का परिपथीय नियम गणितीय रूप में लिखिए। किसी लम्बी धारावाही परिनालिका के अक्ष पर चुम्बकीय क्षेत्र का व्यंजक व्युत्पन्न कीजिए। आवश्यक चित्र बनाइये।
🔁 Repeated · asked 3×Write Ampere's circuital law. Obtain an expression for the magnetic field on the axis of a current-carrying very long solenoid. Draw the necessary diagram.
ऐम्पियर का परिपथीय नियम लिखिए। एक अत्यधिक लम्बी धारावाही परिनालिका के अक्ष पर चुम्बकीय क्षेत्र का व्यंजक प्राप्त कीजिए। आवश्यक चित्र बनाइए।
🔁 Repeated · asked 2×Derive an expression for the force per unit length acting between two straight parallel current-carrying conductors. Define the standard unit of current on this basis.
दो सीधे समान्तर धारावाही चालकों के बीच प्रति इकाई लम्बाई पर बल का व्यंजक प्राप्त कीजिए। किस अवस्था में यह बल आकर्षण व प्रतिकर्षण का होता है? विद्युत धारा के मानक मात्रक की परिभाषा लिखिए।
⚙️ Core derivationDescribe the construction of a suspended-coil galvanometer with a labelled diagram. Prove that the current flowing through the coil is directly proportional to the deflection produced.
निलम्बित कुण्डली धारामापी की संरचना का वर्णन कीजिए, इसका नामांकित चित्र बनाइए। सिद्ध कीजिए कि धारामापी की कुण्डली में प्रवाहित धारा कुण्डली में उत्पन्न विक्षेप के अनुक्रमानुपाती होती है।
⭐ High-weightage derivationThe other 5 are in the free PDF — and all 31 previous-year questions for this chapter are in the full book.
Get 10 hand-picked previous-year questions from Chapter 4. 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 4 (Moving Charges and Magnetism) is tested every year without fail. It belongs to Unit III — Magnetic Effects of Current and Magnetism and is drawn from a pool of 31 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.
You can expect a quick 0.5 to 1-mark opener on the direction of magnetic force or field, or a definition like the figure of merit of a galvanometer. The 2-mark questions lean on Biot-Savart law applications and galvanometer conversions. The heavy marks sit in the 4-mark long answers, which almost always ask you to derive the magnetic field on the axis of a current-carrying loop using Biot-Savart law (asked in 2017, 2021, 2024, 2025 and 2026) or to apply Ampere's circuital law to a straight wire or solenoid.
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 4 mein Biot-Savart law wala derivation baar baar aata hai — is list se priority samajh aa gayi."
"Free PDF mein solid 10 questions mile, Ampere's law wale numericals bahut kaam aaye."
"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 31 tagged previous-year questions for Moving Charges and Magnetism — plus all 13 other chapters.
Every MCQ, VSA, SA and long-answer question for this chapter from RBSE papers 2013–2026 — 31 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 moving charges and magnetism formula — Biot-Savart law, Ampere's circuital law, solenoid and galvanometer 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 →