JEE Main · Physics · Electromagnetic Induction

Faraday's Law: JEE Main previous year questions

Name: Faraday's Law: JEE Main previous year questions
Creator: Lumi

46 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: 46; in 43 of 108 shifts
Years asked: 7/8; last asked 2026
Chance in a shift: 47%; calibrated model, how we compute it
Weighted estimate: 0.4; model; history: 0.4 a shift on average, typically 0.3–0.6

Key findings

01
Asked in 7 of 8 years with analysed shifts and in 43 of 108 shifts: 46 questions, #66 of 196 topics. The years that asked it were 1.5 apart on average.
02
36% of its questions since 2020 tested an idea no earlier year had asked; 22 repeated an idea from the year before.
03
The most repeated idea is Faraday's Law Magnitude, asked 15 times in 15 shifts (2020, 2021, 2022, 2023, 2024, 2026), most often as “peak emf in loop in sinusoidal field”.
04
JEE Main has asked 13 of the 61 ideas in this topic; 39 have never been asked, directly or inside another question.
05
Mostly asked as numerical value (52%); 52% need a numerical answer, 37% are easy and 7% hard.
06
The skill tested most is calculation (54%), then multi-step (33%).

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: 4 in 12 shifts · 2021: 10 in 24 shifts · 2022: 8 in 24 shifts · 2023: 9 in 12 shifts · 2024: 10 in 18 shifts · 2025: 0 in 8 shifts · 2026: 4 in 9 shifts.

Up to 2023: 0.5; a shift, of 25
Since 2024: 0.3; -0.2
Usual gap: 1.5 yrs; between years asking it
Shifts with it: 43/108; 40% of analysed shifts

Revise first

Faraday's Law Magnitude · asked 2020, 2021, 2022, 2023, 2024, 2026
Rotational Motional EMF · asked 2022, 2023, 2024, 2026
Linear Motional EMF · asked 2021, 2022, 2023

How it is asked

Difficulty, format and skill

Across all 46 questions on Faraday's Law since 2017.

Difficulty

QUESTIONS

1726

Easy17 · 37%
Medium26 · 57%
Hard3 · 7%

Format

Numerical value · 24 Q52%
Single correct · 19 Q41%
Diagram based · 2 Q4%
Other · 1 Q2%

Skill tested

Calculation · 25 Q54%
Multi-step · 15 Q33%
Conceptual · 2 Q4%
Application · 2 Q4%
Data or graph · 2 Q4%

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.

’17’20’21’22’23’24’25’26

Idea asked for the first time
Idea asked in an earlier year

Coverage of the topic

JEE Main has asked 13 of the 61 ideas in this topic. 39 have never been asked yet.

13939

Asked directly13 · 21%
Touched inside another question9 · 15%
Never asked39 · 64%

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

Idea, year, question

Every idea JEE Main tested in this topic, with its eight years. Open one to read the questions.

ideaAskedShareYears’17’20’21’22’23’24’25’26

OpenRepeated15 · 33%33%6/8234222
- 5 Apr ’26 S2 · Q50
  A circular loop of radius 20 cm and resistance 2 $\Omega$ is placed in a time varying magnetic field $\vec{B}=(2t^2+2t+3)\ \mathrm{T}$ . At…
  easyNumerical value
- 6 Apr ’26 S2 · Q39
  A square loop of side 2 cm is placed in a time varying magnetic field with magnitude as $B=0.4\sin(300t)$ Tesla. The normal to the plane…
  mediumSingle correct
- 29 Jan ’24 S1 · Q58
  A square loop of side 10 cm and resistance $0.7\,\Omega$ is placed vertically in east-west plane. A uniform magnetic field of $0.20\ T$ is…
  easyNumerical valueAsked the year before
- 31 Jan ’24 S2 · Q58
  The magnetic flux $\phi$ (in weber) linked with a closed circuit of resistance $8\ \Omega$ varies with time (in seconds) as…
  easyNumerical valueAsked the year before
- 11 Apr ’23 S1 · Q53
  The magnetic field B crossing normally a square metallic plate of area 4 m $^2$ is changing with time as shown in figure. The magnitude of…
  easyNumerical valueAsked the year before
- 12 Apr ’23 S1 · Q58
  A conducting circular loop is placed in a uniform magnetic field of 0.4 T with its plane perpendicular to the field. Somehow, the radius…
  mediumNumerical valueAsked the year before
- 25 Jul ’22 S2 · Q60
  Magnetic flux (in weber) in a closed circuit of resistance 20 $\Omega$ varies with time t(s) as $\phi$ = 8t $^{2}$ - 9t + 5. The magnitude…
  easyNumerical valueAsked the year before
- 26 Jul ’22 S2 · Q58
  In a coil of resistance 8 $\Omega$ ,the magnetic flux due to an external magnetic field varies with time as…
  mediumNumerical valueAsked the year before
- 27 Jul ’22 S2 · Q54
  A conducting circular loop is placed in X - Y plane in presence of magnetic field $\vec{B}=\left(3t^3\hat{j}+3t^2\hat{k}\right)$ in SI…
  mediumNumerical valueAsked the year before
- 28 Jun ’22 S2 · Q44
  Read the question
  hardSingle correctAsked the year before
- 3 Aug ’21 S2 · Q22
  Read the question
  easyNumerical valueAsked the year before
- 4 Aug ’21 S2 · Q6
  Read the question
  mediumSingle correctAsked the year before
- 25 Jul ’21 S1 · Q26
  Read the question
  mediumNumerical valueAsked the year before
- 8 Jan ’20 S1 · Q14
  Read the question
  mediumSingle correctNew idea
- 3 Sep ’20 S2 · Q14
  Read the question
  mediumSingle correctNew idea
OpenRepeated7 · 15%15%3/833
OpenRepeated5 · 11%11%4/82
OpenRepeated5 · 11%11%4/82
OpenRepeated3 · 7%7%3/8
OpenRepeated3 · 7%7%2/82
OpenRepeated2 · 4%4%2/8
Open1 · 2%2%1/8
Open1 · 2%2%1/8
Open1 · 2%2%1/8
Open1 · 2%2%1/8
Open1 · 2%2%1/8
Open1 · 2%2%1/8

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

13 different ideas were tested; 7 came more than once.

Faraday's Law Magnitude15×
peak emf in loop in sinusoidal field
Numerical value · 15 shifts · 10 numerical
Linear Motional EMF7×
speed from motional emf
Single correct · 6 shifts · 3 numerical
Rotational Motional EMF5×
emf of rotating rod in non-uniform field
Numerical value · 5 shifts · 3 numerical
AC Generator Principle5×
maximum emf of rotating coil
Numerical value · 5 shifts · 4 numerical
Induced Charge Flow3×
induced charge in coil from changing current
Single correct · 3 shifts · 1 numerical
Magnetic Flux Calculation3×
count correct statements on induced emf methods
Numerical value · 3 shifts · 1 numerical
N-Turns Multiplier for Coils2×
power ratio of two coils in changing field
Single correct · 2 shifts
Average Induced EMF1×
average induced emf from flux change
Single correct · 1 shift
EMF Profile of Loop Entering/Exiting B-Field1×
induced emf of loop crossing field region
Single correct · 1 shift
Power Dissipation in Motional EMI1×
power dissipated by loop in changing field
Numerical value · 1 shift · 1 numerical
Total Heat Dissipation in Transient EMI1×
work done pulling loop out of field
Numerical value · 1 shift · 1 numerical
EMF in Spatially Varying Fields1×
emf of loop moving in non-uniform field
Diagram based · 1 shift
Motional EMF in Arbitrary Shapes1×
emf of loop entering magnetic field region
Diagram based · 1 shift

Idea	Times	Shifts	Format	Numerical
Faraday's Law Magnitudepeak emf in loop in sinusoidal field	15	15	Numerical valueCalculation	10
Linear Motional EMFspeed from motional emf	7	6	Single correctCalculation	3
Rotational Motional EMFemf of rotating rod in non-uniform field	5	5	Numerical valueCalculation	3
AC Generator Principlemaximum emf of rotating coil	5	5	Numerical valueCalculation	4
Induced Charge Flowinduced charge in coil from changing current	3	3	Single correctCalculation	1
Magnetic Flux Calculationcount correct statements on induced emf methods	3	3	Numerical valueCalculation	1
N-Turns Multiplier for Coilspower ratio of two coils in changing field	2	2	Single correctCalculation	–
Average Induced EMFaverage induced emf from flux change	1	1	Single correctCalculation	–
EMF Profile of Loop Entering/Exiting B-Fieldinduced emf of loop crossing field region	1	1	Single correctApplication	–
Power Dissipation in Motional EMIpower dissipated by loop in changing field	1	1	Numerical valueMulti-step	1
Total Heat Dissipation in Transient EMIwork done pulling loop out of field	1	1	Numerical valueMulti-step	1
EMF in Spatially Varying Fieldsemf of loop moving in non-uniform field	1	1	Diagram basedMulti-step	–
Motional EMF in Arbitrary Shapesemf of loop entering magnetic field region	1	1	Diagram basedApplication	–

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

Faraday's Law questions, year by year

The newest 40 show their opening words as they appeared in the official paper; older ones name the idea they tested. Open one for its options and the official answer.

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.

Key findings

Questions a shift, year by year

Difficulty, format and skill

Difficulty

Format

Skill tested

New idea, or one asked before?

Coverage of the topic

Idea, year, question

Every idea inside this topic

Faraday's Law questions, year by year

JEE Main 20264 questions in 3 shifts

JEE Main 202410 questions in 10 shifts

JEE Main 20239 questions in 9 shifts

JEE Main 20228 questions in 8 shifts

JEE Main 202110 questions in 8 shifts

JEE Main 20204 questions in 4 shifts

JEE Main 20171 question in 1 shift

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