JEE Main · Physics · Moving Charges and Magnetism
Magnetic Dipole Moment: JEE Main previous year questions
34 questions in the 108 JEE Main shifts Lumi analysed, in 7 of 8 years. Pattern: Asked most years. 14 came in 2024–26. Here is how it is asked and which ideas come back.
- Questions
- 34
- in 32 of 108 shifts
- Years asked
- 7/8
- last asked 2026
- Weighted estimate
- 0.3
- model; history: 0.4 a shift on average, typically 0.1–0.7
Key findings
- 01
Asked in 7 of 8 years with analysed shifts and in 32 of 108 shifts: 34 questions, #102 of 196 topics. The years that asked it were 1.5 apart on average.
- 02
67% of its questions since 2020 tested an idea no earlier year had asked; 2 repeated an idea from the year before.
- 03
The most repeated idea is Torque on a dipole in uniform field, asked 6 times in 6 shifts (2020, 2021, 2024, 2026), most often as “torque on current coil in field”.
- 04
JEE Main has asked 20 of the 56 ideas in this topic; 31 have never been asked, directly or inside another question.
- 05
Mostly asked as single correct (53%); 41% need a numerical answer, 38% are easy and 12% hard.
- 06
The skill tested most is calculation (53%), then multi-step (32%).
Questions a shift, year by year
Out of the 25 Physics questions in a shift. Years differ in how many shifts Lumi analysed, so each year is scaled to one shift.
Raw count: 2017: 1 in 1 shift · 2020: 8 in 12 shifts · 2021: 5 in 24 shifts · 2022: 6 in 24 shifts · 2023: 0 in 12 shifts · 2024: 9 in 18 shifts · 2025: 1 in 8 shifts · 2026: 4 in 9 shifts.
- Up to 2023
- 0.4
- a shift, of 25
- Since 2024
- 0.3
- 0.0
- Usual gap
- 1.5 yrs
- between years asking it
- Shifts with it
- 32/108
- 30% of analysed shifts
How it is asked
Difficulty, format and skill
Across all 34 questions on Magnetic Dipole Moment since 2017.
Difficulty
QUESTIONS- Easy13 · 38%
- Medium17 · 50%
- Hard4 · 12%
Format
SHARE- Single correct · 18 Q53%
- Numerical value · 14 Q41%
- Diagram based · 2 Q6%
Skill tested
SHARE- Calculation · 18 Q53%
- Multi-step · 11 Q32%
- Conceptual · 2 Q6%
- Application · 2 Q6%
- Recall · 1 Q3%
Repeats
New idea, or one asked before?
Each column is a year. Blue questions tested an idea no earlier year had asked; navy ones went back to an idea from an earlier year. 2017 is the first year, so everything in it counts as new. Heights are question counts, and Lumi analysed 1 to 24 shifts a year, so compare the split inside a column rather than heights across years.
- Idea asked for the first time
- Idea asked in an earlier year
Coverage of the topic
JEE Main has asked 20 of the 56 ideas in this topic. 31 have never been asked yet.
- Asked directly20 · 36%
- Touched inside another question5 · 9%
- Never asked31 · 55%
Ideas come from Lumi’s JEE syllabus map. A never-asked idea is not a safe skip: across all of JEE Main, 22% of questions since 2024 tested an idea no earlier year had asked.
Drill down
Chapter, idea, question
Every idea JEE Main tested in this topic, with its eight years. Open one to read the questions.
13 ideas inside
Squares are the 8 years with analysed shifts, 2017 to 2026. A number is the questions that year when there is more than one; the shade is scaled to one shift, so a year with more analysed shifts (1 to 24 a year) does not look darker. Share is of the level above.
Ideas
Every idea inside this topic
20 different ideas were tested; 5 came more than once.
torque on current coil in field
Numerical value · 6 shifts · 3 numericalwork in turning current coil in field
Single correct · 5 shifts · 2 numericalnet field of two perpendicular magnets
Numerical value · 3 shifts · 3 numericalmagnetic moment of wire bent into circle
Diagram based · 3 shifts · 1 numericaloscillation time of magnetic needle
Single correct · 2 shiftsmagnetic moment of flat spiral coil
Single correct · 1 shiftpotential energy of dipole from torque
Single correct · 1 shiftmoment of bent bar magnet
Numerical value · 1 shift · 1 numericalnet force on loop in non-uniform field
Numerical value · 1 shift · 1 numericalforce on current loop in varying field
Numerical value · 1 shift · 1 numericalscaling of quantity with bohr orbit number
Single correct · 1 shiftratio of magnetic moments from oscillation periods
Single correct · 1 shiftidentify expression for orbital magnetic moment
Single correct · 1 shiftfractional change in magnetic moment of core
Numerical value · 1 shift · 1 numericalratio of magnetic moments of polygon coils from fixed wire
Numerical value · 1 shift · 1 numericaleffect of magnetic field on flexible current loop
Single correct · 1 shiftangular speed of coil rotating in magnetic field
Single correct · 1 shiftmagnetic moment of non-planar loop
Diagram based · 1 shiftmagnetic moment of charged particle in b field
Single correct · 1 shifttorque on square loop near long wire
Single correct · 1 shift
| Idea | Years asked | Times | Shifts | Format | Numerical |
|---|---|---|---|---|---|
| Torque on a dipole in uniform fieldtorque on current coil in field | 6 | 6 | Numerical valueCalculation | 3 | |
| Work done in rotating a dipolework in turning current coil in field | 5 | 5 | Single correctCalculation | 2 | |
| Magnetic Field of a Short Dipolenet field of two perpendicular magnets | 3 | 3 | Numerical valueMulti-step | 3 | |
| Magnetic moment of a current loopmagnetic moment of wire bent into circle | 3 | 3 | Diagram basedApplication | 1 | |
| Small Oscillations of a Magnetic Dipoleoscillation time of magnetic needle | 2 | 2 | Single correctCalculation | – | |
| Magnetic Moment of a Flat Spiral Coilmagnetic moment of flat spiral coil | 1 | 1 | Single correctCalculation | – | |
| Potential energy in a magnetic fieldpotential energy of dipole from torque | 1 | 1 | Single correctCalculation | – | |
| Bending a Bar Magnet into a Semicirclemoment of bent bar magnet | 1 | 1 | Numerical valueCalculation | 1 | |
| Force in non-uniform magnetic fieldsnet force on loop in non-uniform field | 1 | 1 | Numerical valueCalculation | 1 | |
| Force on Dipole in 1D Field Gradientforce on current loop in varying field | 1 | 1 | Numerical valueMulti-step | 1 | |
| Magnetic Moment in Bohr Orbitsscaling of quantity with bohr orbit number | 1 | 1 | Single correctConceptual | – | |
| Comparing Moments via Vibration Magnetometerratio of magnetic moments from oscillation periods | 1 | 1 | Single correctCalculation | – | |
| Gyromagnetic ratio and Bohr magnetonidentify expression for orbital magnetic moment | 1 | 1 | Single correctRecall | – | |
| Magnetic Moment of a Solenoidfractional change in magnetic moment of core | 1 | 1 | Numerical valueCalculation | 1 | |
| Magnetic Moment of Polygons from Fixed Wireratio of magnetic moments of polygon coils from fixed wire | 1 | 1 | Numerical valueCalculation | 1 | |
| Stable and unstable equilibrium stateseffect of magnetic field on flexible current loop | 1 | 1 | Single correctConceptual | – | |
| Kinetic Energy Gained in Rotationangular speed of coil rotating in magnetic field | 1 | 1 | Single correctMulti-step | – | |
| Magnetic Moment of Non-Planar Loopsmagnetic moment of non-planar loop | 1 | 1 | Diagram basedMulti-step | – | |
| Moment of a rotating point chargemagnetic moment of charged particle in b field | 1 | 1 | Single correctMulti-step | – | |
| Torque from a Straight Wire Fieldtorque on square loop near long wire | 1 | 1 | Single correctMulti-step | – |
Times and shifts count every analysed shift. Across JEE Main, 78% of questions since 2024 went back to an idea an earlier year had asked; the rest were new. All repeated ideas
Every question
Magnetic Dipole Moment questions, year by year
The opening words of each question as it appeared in the official paper, with the idea it tested. Open one for its options and the official answer.
JEE Main 20264 questions in 3 shifts
- 4 Apr, Shift 1Q41An insulated wire is wound so that it forms a flat coil with turns. The radius of the innermost turn is cm, and of the…
Idea: Magnetic Moment of a Flat Spiral Coil
New ideaMediumSingle correct - 4 Apr, Shift 2Q48Two identical small bar magnets each of dipole moment J/T are placed at a center to center separation of 10 cm, with their axes…
Idea: Magnetic Field of a Short Dipole
MediumNumerical value · figure - 4 Apr, Shift 2Q49A circular coil of radius 2 cm and 125 turns carries a current of 1 A. The coil is placed in a uniform magnetic field of magnitude 0.4 T.…
Idea: Torque on a dipole in uniform field
EasyNumerical value - 8 Apr, Shift 2Q39A current carrying circular loop of radius 2 cm with unit normal is placed in a magnetic…
Idea: Torque on a dipole in uniform field
MediumSingle correct
JEE Main 20251 question in 1 shift
- 3 Apr, Shift 2Q36A magnetic dipole experiences a torque of N m when placed in uniform magnetic field in such a way that dipole moment makes…
Idea: Potential energy in a magnetic field
New ideaEasySingle correct
JEE Main 20249 questions in 9 shifts
- 4 Apr, Shift 1Q57The magnetic field existing in a region is given by . A square loop of edge 50 cm carrying 0.5…
Idea: Force in non-uniform magnetic fields
New ideaHardNumerical value · figure - 4 Apr, Shift 2Q43The magnetic moment of a bar magnet is 0.5 Am. It is suspended in a uniform magnetic field of T. The work done in…
Idea: Work done in rotating a dipole
EasySingle correct - 6 Apr, Shift 1Q57A circular coil having 200 turns, m area and carrying 100 A current is placed in a uniform magnetic field of…
Idea: Work done in rotating a dipole
EasyNumerical value - 6 Apr, Shift 2Q58A coil having 100 turns, area of , carrying current of 1 mA is placed in uniform magnetic field of 0.20 T…
Idea: Work done in rotating a dipole
EasyNumerical value - 9 Apr, Shift 1Q57A square loop of edge length m carrying current of A is placed with its edges parallel to the - axis. A magnetic field is…
Idea: Force on Dipole in 1D Field Gradient
New ideaHardNumerical value - 9 Apr, Shift 2Q54A straight magnetic strip has a magnetic moment of . If the strip is bent in a semicircular shape, its magnetic moment…
Idea: Bending a Bar Magnet into a Semicircle
New ideaEasyNumerical value - 29 Jan, Shift 1Q57The magnetic potential due to a magnetic dipole at a point on its axis situated at a distance of 20 cm from its center is…
Idea: Magnetic Field of a Short Dipole
EasyNumerical value - 30 Jan, Shift 2Q48An electron revolving in Bohr orbit has magnetic moment . If , the value of is
Idea: Magnetic Moment in Bohr Orbits
New ideaEasySingle correct - 31 Jan, Shift 2Q42A uniform magnetic field of T acts along positive -direction. A rectangular loop of sides 20 cm and 10 cm with current…
Idea: Torque on a dipole in uniform field
MediumSingle correct
JEE Main 20226 questions in 6 shifts
- 25 Jul, Shift 1Q49The magnetic moment of an electron (e) revolving in an orbit around nucleus with an orbital angular momentum is given by :
Idea: Gyromagnetic ratio and Bohr magneton
New ideaEasySingle correct - 26 Jul, Shift 2Q46Two concentric circular loops of radii =30 cm and =50 cm are placed in X-Y plane as shown in the figure. A current is…
Idea: Magnetic moment of a current loop
New ideaMediumDiagram based · figure - 27 Jul, Shift 1Q42Two bar magnets oscillate in a horizontal plane in earth's magnetic field with time periods of 3s and 4s respectively. If their moments of…
Idea: Comparing Moments via Vibration Magnetometer
New ideaEasySingle correct - 29 Jul, Shift 1Q58A wire of length 314 cm carrying current of 14 A is bent to form a circle. The magnetic moment of the coil is __________ A-.…
Idea: Magnetic moment of a current loop
New ideaMediumNumerical value - 30 Jul, Shift 2Q15A wire of length 8 m is bent to form a circular loop in y-z plane. A current of 0.5 A is flowing in anticlockwise direction in it , the…
Idea: Magnetic moment of a current loop
New ideaMediumSingle correct - 26 Jun, Shift 2Q42A bar magnet having a magnetic moment of , is placed along the direction of uniform magnetic field of…
Idea: Work done in rotating a dipole
EasySingle correct
JEE Main 20215 questions in 5 shifts
- 26 Aug, Shift 1Q25Two short magnetic dipoles and each having magnetic moment of 1 are placed at point O and P respectively. The…
Idea: Magnetic Field of a Short Dipole
New ideaMediumNumerical value · figure - 26 Aug, Shift 2Q29A coil in the shape of an equilateral triangle of side 10 cm lies in a vertical plane between the pole pieces of permanent magnet…
Idea: Torque on a dipole in uniform field
Asked the year beforeMediumNumerical value - 27 Aug, Shift 1Q27A uniform conducting wire of length is 24a, and resistance R is wound up as a current carrying coil in the shape of an equilateral…
Idea: Magnetic Moment of Polygons from Fixed Wire
New ideaMediumNumerical value - 31 Aug, Shift 2Q29A long solenoid with 1000 turns/m has a core material with relative permeability 500 and volume cm. If the core material is…
Idea: Magnetic Moment of a Solenoid
New ideaMediumNumerical value - 18 Mar, Shift 1Q12A loop of flexible wire of irregular shape carrying current is placed in an external magnetic field. Identify the effect of the field on…
Idea: Stable and unstable equilibrium states
New ideaMediumSingle correct
JEE Main 20208 questions in 7 shifts
- 9 Jan, Shift 2Q13A small circular loop of conducting wire has radius and carries current . It is placed in a uniform magnetic field …
Idea: Small Oscillations of a Magnetic Dipole
Asked the year beforeMediumSingle correct - 2 Sep, Shift 2Q13A wire carrying current I is bent in the shape ABCDEFA as shown, where rectangle ABCDA and ADEFA are perpendicular to each other. If the…
Idea: Magnetic Moment of Non-Planar Loops
New ideaMediumDiagram based · figure - 3 Sep, Shift 2Q24A galvanometer coil has 500 turns and each turn has an average area of m. If a torque of 1.5 Nm is required to keep…
Idea: Torque on a dipole in uniform field
New ideaEasyNumerical value - 4 Sep, Shift 1Q14A small bar magnet placed with its axis at 30° with an external field of 0.06 T experiences a torque of 0.018 Nm. The minimum work…
Idea: Work done in rotating a dipole
New ideaMediumSingle correct - 4 Sep, Shift 2Q13A circular coil has moment of inertia 0.8 kg m around any diameter and is carrying current to produce a magnetic moment of 20 Am.…
Idea: Kinetic Energy Gained in Rotation
New ideaMediumSingle correct - 5 Sep, Shift 1Q15A square loop of side 2a, and carrying current I, is kept in XZ plane with its centre at origin. A long wire carrying the same current I…
Idea: Torque on a dipole in uniform field
New ideaHardSingle correct - 6 Sep, Shift 2Q14A charged particle going around in a circle can be considered to be a current loop. A particle of mass m carrying charge q is moving in a…
Idea: Moment of a rotating point charge
New ideaMediumSingle correct - 6 Sep, Shift 2Q15A square loop of side 2a and carrying current I is kept in plane with its centre at origin. A long wire carrying the same current I…
Idea: Torque from a Straight Wire Field
New ideaHardSingle correct
JEE Main 20171 question in 1 shift
- 2 Apr (offline)Q18A magnetic needle of magnetic moment and moment of inertia is…
Idea: Small Oscillations of a Magnetic Dipole
EasySingle correct
Questions from the official JEE Main Paper 1 shifts published by NTA (CBSE for 2017). Questions NTA dropped are left out. Topic and idea tags, counts and notes are Lumi’s.