JEE Main · Physics · Moving Charges and Magnetism
Ampere's Circuital Law: JEE Main previous year questions
15 questions in the 108 JEE Main shifts Lumi analysed, in 6 of 8 years. Pattern: Asked most years. 4 came in 2024–26. Here is how it is asked and which ideas come back.
- Questions
- 15
- in 15 of 108 shifts
- Years asked
- 6/8
- last asked 2026
- Weighted estimate
- 0.1
- model; history: 0.1 a shift on average, typically 0.0–0.1
Key findings
- 01
Asked in 6 of 8 years with analysed shifts and in 15 of 108 shifts: 15 questions, #157 of 196 topics. The years that asked it were 1.2 apart on average.
- 02
60% of its questions since 2020 tested an idea no earlier year had asked; 5 repeated an idea from the year before.
- 03
The most repeated idea is Ideal Infinite Solenoid, asked 5 times in 5 shifts (2021, 2022, 2023, 2024), most often as “field in solenoid network”.
- 04
JEE Main has asked 8 of the 61 ideas in this topic; 52 have never been asked, directly or inside another question.
- 05
Mostly asked as single correct (73%); 13% need a numerical answer, 60% are easy and 0% hard.
- 06
The skill tested most is calculation (47%), then conceptual (27%).
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: 0 in 1 shift · 2020: 1 in 12 shifts · 2021: 5 in 24 shifts · 2022: 3 in 24 shifts · 2023: 2 in 12 shifts · 2024: 3 in 18 shifts · 2025: 0 in 8 shifts · 2026: 1 in 9 shifts.
- Up to 2023
- 0.1
- a shift, of 25
- Since 2024
- 0.1
- 0.0
- Usual gap
- 1.2 yrs
- between years asking it
- Shifts with it
- 15/108
- 14% of analysed shifts
How it is asked
Difficulty, format and skill
Across all 15 questions on Ampere's Circuital Law since 2017.
Difficulty
QUESTIONS- Easy9 · 60%
- Medium6 · 40%
- Hard0 · 0%
Format
SHARE- Single correct · 11 Q73%
- Numerical value · 2 Q13%
- Diagram based · 1 Q7%
- Other · 1 Q7%
Skill tested
SHARE- Calculation · 7 Q47%
- Conceptual · 4 Q27%
- Application · 2 Q13%
- Data or graph · 1 Q7%
- Multi-step · 1 Q7%
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 8 of the 61 ideas in this topic. 52 have never been asked yet.
- Asked directly8 · 13%
- Touched inside another question1 · 2%
- Never asked52 · 85%
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.
6 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
8 different ideas were tested; 2 came more than once.
field in solenoid network
Single correct · 5 shifts · 2 numericalratio of field inside and outside thick wire
Single correct · 4 shiftsmagnetic intensity from field and permeability
Single correct · 1 shiftmagnetic field regions of coaxial cable
Single correct · 1 shiftfield inside and outside current-carrying wire
Single correct · 1 shiftgraph interpretation of b vs distance for current cylinder
Diagram based · 1 shiftfield inside cylinder with radial current density
Single correct · 1 shiftcount correct statements on magnetism and matter
Other · 1 shift
| Idea | Years asked | Times | Shifts | Format | Numerical |
|---|---|---|---|---|---|
| Ideal Infinite Solenoidfield in solenoid network | 5 | 5 | Single correctCalculation | 2 | |
| Field Inside Thick Wireratio of field inside and outside thick wire | 4 | 4 | Single correctCalculation | – | |
| Ampere's Law for Magnetic Intensity (H)magnetic intensity from field and permeability | 1 | 1 | Single correctCalculation | – | |
| Coaxial Cable Magnetic Fieldsmagnetic field regions of coaxial cable | 1 | 1 | Single correctConceptual | – | |
| B vs r Graph for Solid Cylinderfield inside and outside current-carrying wire | 1 | 1 | Single correctConceptual | – | |
| Magnetic Field of a Hollow Cylindrical Pipegraph interpretation of b vs distance for current cylinder | 1 | 1 | Diagram basedData or graph | – | |
| Non-Uniform Current Density in Cylindersfield inside cylinder with radial current density | 1 | 1 | Single correctCalculation | – | |
| Toroidal Magnetic Fieldcount correct statements on magnetism and matter | 1 | 1 | OtherConceptual | – |
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
Ampere's Circuital Law 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 20261 question in 1 shift
- 4 Apr, Shift 2Q39A solenoid has a core made of material with relative permeability 400. The magnetic field produced in the interior of solenoid is 1.0 T.…
Idea: Ampere's Law for Magnetic Intensity (H)
New ideaEasySingle correct
JEE Main 20243 questions in 3 shifts
- 5 Apr, Shift 1Q43In a co-axial straight cable, the central conductor and the outer conductor carry equal currents in opposite directions. The magnetic…
Idea: Coaxial Cable Magnetic Fields
New ideaEasySingle correct - 5 Apr, Shift 2Q57A solenoid of length 0.5 m has a radius of 1 cm and is made up of 'm' number of turns. It carries a current of 5 A. If the magnitude of…
Idea: Ideal Infinite Solenoid
Asked the year beforeEasyNumerical value - 8 Apr, Shift 2Q42A long straight wire of radius a carries a steady current I. The current is uniformly distributed across its cross section. The ratio of…
Idea: Field Inside Thick Wire
MediumSingle correct
JEE Main 20232 questions in 2 shifts
- 6 Apr, Shift 1Q40A long straight wire of circular cross-section (radius a) is carrying steady current I. The current I is uniformly distributed across this…
Idea: B vs r Graph for Solid Cylinder
New ideaEasySingle correct - 8 Apr, Shift 1Q58The magnetic intensity at the center of a long current carrying solenoid is found to be . If the number…
Idea: Ideal Infinite Solenoid
Asked the year beforeEasyNumerical value
JEE Main 20223 questions in 3 shifts
- 25 Jun, Shift 1Q40A long straight wire with a circular cross-section having radius R, is carrying a steady current I. The current I is uniformly distributed…
Idea: Field Inside Thick Wire
Asked the year beforeEasySingle correct - 25 Jun, Shift 2Q41A long solenoid carrying a current produces a magnetic field along its axis. If the current is doubled and the number of turns per cm…
Idea: Ideal Infinite Solenoid
Asked the year beforeEasySingle correct - 28 Jun, Shift 1Q40An infinitely long hollow conducting cylinder with radius R carries a uniform current along its surface. Choose the correct representation…
Idea: Magnetic Field of a Hollow Cylindrical Pipe
New ideaMediumDiagram based · figure
JEE Main 20215 questions in 5 shifts
- 3 Aug, Shift 1Q12Consider the case of a non-homogeneous solid cylinder of radius R carrying a current ‘I' such that the current density depends on the…
Idea: Non-Uniform Current Density in Cylinders
New ideaMediumSingle correct - 27 Aug, Shift 2Q11A coaxial cable consists of an inner wire of radius ‘a’ surrounded by an outer shell of inner and outer radii ‘b’ and ‘c’ respectively.…
Idea: Field Inside Thick Wire
Asked the year beforeMediumSingle correct - 17 Mar, Shift 1Q4A solenoid of 1000 turns per metre has a core with relative permeability 500. Insulated windings of the solenoid carry an electric current…
Idea: Ideal Infinite Solenoid
New ideaEasySingle correct - 18 Mar, Shift 1Q3Four identical long solenoids A, B, C and D are connected to each other as shown in the figure. If the magnetic field at the center of A…
Idea: Ideal Infinite Solenoid
New ideaMediumSingle correct · figure - 18 Mar, Shift 2Q14Which of the following statements are correct ? (A) Electric monopoles do not exist whereas magnetic monopoles exist. (B) Magnetic field…
Idea: Toroidal Magnetic Field
New ideaMediumOther
JEE Main 20201 question in 1 shift
- 9 Jan, Shift 1Q12A long, straight wire of radius a carries a current distributed uniformly over its cross-section. The ratio of the magnetic fields due to…
Idea: Field Inside Thick Wire
New ideaEasySingle 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.