Magnetic Effects JEE Main Questions 2025: Important Practice Questions with PYQs

Dewesh Nandan Prasad

Updated On: February 04, 2025 11:39 AM | JEE Main

The important Magnetic Effects JEE Main Questions 2025 have been provided in this article. The Magnetic Effects is one of the important chapters of the JEE Main 2025 exam and candiates who are preparing for the exam must go through and solve the previous year's questions to score well in the exam.
Magnetic Effects JEE Main Questions 2025

Magnetic Effects JEE Main Questions 2025: Aspirants preparing to appear for the JEE Main 2025 exam must cover the Magnetic Effects chapter as it is one of the most important chapters of the JEE Main Physics syllabus. The Magnetic Effects chapter from the JEE main physics syllabus 2025 is divided into subtopics like Ampere’s law & its application, Magnetic Force on a moving charge, Cyclotron, Torque, Current Loop acting as a magnetic dipole, etc. Test takers must note that the expected Magnetic Effects JEE Main weightage is 7%. Students can expect 1 to 2 questions from the Magnetic Effects chapter. To give a little relief in the preparation, we have provided the important questions, PYQs (Previous Year’s Questions), and practice questions for the Magnetic Effects for JEE Main 2025 exam in this article.

Latest Update : JEE Main session 2 registration has begun on the jeemain.nta.nic.in on February 1, 2025 and the last date to register will be February 24, 2025. Candidates can now register themselves and fill in the JEE Main 2025 application form . The candidates who have registered for the JEE Main session 1 and also want to appear for session 2 will have to apply a fresh application and register themselves on the official website. The JEE Main session 2 2025 will be conducted from April 1 - April 8, 2025.

Magnetic Effects JEE Main Questions 2025: Syllabus

Candidates preparing for the exam must check the Magnetic Effects subtopics before starting to prepare for the JEE main 2025 exam. Check the topic-wise Magnetic Effects JEE Main 2025 syllabus below:

  • Biot - Savart law and its application
  • Ampere's law and its applications
  • Magnetic Force on a moving charge in uniform magnetic fields and electric fields
  • Cyclotron
  • Force on a current-carrying conductor in a uniform magnetic field
  • The force between two parallel current-carrying conductors
  • Torque experienced by a current-carrying loop in a uniform magnetic field
  • Moving coil galvanometer
  • Current loop acting as a magnetic dipole and its magnetic dipole moment
  • Para-, dia- and ferromagnetic substances
  • Magnetic susceptibility and permeability
  • Electromagnets and permanent magnets

Also Read: JEE Main Application 2025

JEE Main 2025 Magnetic Effects Important Questions

Preparation can be monotonous and tiring to avoid, and candidates must go through different sources of learning as it can provide a new angle to think and spark the energy in their brains. We have provided some important questions to practice from Magnetic Effects for JEE Main 2025. Check the important questions to practice below:

Magnetic Effects Important Questions for JEE Main 2025

Q1:  A straight wire of length π2 metre carrying a current of 2 A and the magnetic field due to it is measured at a point distant 1 cm from it. If the wire were bent into a circle and were to carry the same current as before, the ratio of the magnetic field at its centre to that obtained in the first case would be:
(a) 50: 1 (b) 1: 50

(c) 100: 1 (d) 1: 100

Q2: A bar magnet has a magnetic moment equal to 5 × 10–5 Wb m. It is suspended in a magnetic field which has a magnetic induction B equal to 8p × 10–4 T. The magnet vibrates with a period of vibration equal to 15 s. The moment of inertia of a magnet is

(a) 4.54 × 104 kg m2 (b) 4.54 × 10–5 kg m2
(c) 4.54 × 10–4 kg m2 (d) 4.54 × 105 kg m2

Q3:  In a hydrogen atom, the electrons move about the nucleus in a circular orbit of radius 0.5 Å. What is the magnetic induction produced at the centre of the orbit, if the electrons make 6.25 × 1015 rev per sec? [e = 1.6 × 10–19 C]

(a) 6.28 Wb m–2 (b) 9 Wb m–2

(c) 12.56 Wb m–2 (d) 15 Wb m–2

Q4: A solenoid of length 0.4 m and having 500 turns of wire carries a current of 3.0 A. A thin coil having 10 turns of wire and of a radius of 0.01 m carries a current of 0.04 A. What is the torque required to hold the coil in the middle of the solenoid with its axis perpendicular to the axis of the solenoid? (Use π2 = 10)

(a) 6 × 106 N m (b) 6 × 10–6 N m
(c) 7.5 × 10–6 N m (d) 4.2 × 10–6 N m

Q5: There is a uniform electric field of strength 103 Vm–1 along the y-axis. A body of mass 1 g and charge 10–6 C is projected into the field from the origin along the positive x-axis with a velocity of 10 ms–1. Its speed (in ms–1) after 10 s will be (negative gravitation)

(a) 10 (b) 5√2 (c) 10√2 (d) 20

Q6:  A B and C are parallel conductors of equal lengths carrying currents I, I and 2I respectively. The distance between A and B is x. The distance between B and C is also x. F1 is the force exerted by B on A. F2 is the force exerted by conductor C on A. Choose the correct answer.

(a) F1 = 2F2 (b) F2 = 2F1

(c) F1 = F2 (d) F1 = –F2

Q7: The magnetic susceptibility of a paramagnetic material at –73°C is 0.0075 and its value at –173°C will be

(a) 0.0030 (b) 0.0075

(c) 0.0045 (d) 0.015

Q8: A long straight wire of radius R carries a current I. The current is uniformly distributed across its cross-section. What is the ratio of the magnetic fields at distances of R/2 and 2R from its axis?

(a) 1/2
(b) 1
(c) 2
(d) 4

Q9:  A coil of N turns and radius R carries a current I. it is unwound and rewound to make another coil of radius R/2, current remaining the same. What is the ratio of the magnetic moments of the new coil and the original coil?

(a) 1: 1 (b) 1: 2 (c) 2: 1 (d) 1 : 3

Q10: A current-carrying loop is placed in a uniform magnetic field. The torque acting on it does not depend upon

(a) area of loop (b) no. of turns in the loop

(c) shape of loop (d) strength of current and magnetic field

Also Read: JEE Main Maths Syllabus 2025

Magnetic Effects JEE Main PYQs

Some of the previous years' questions from Magnetic Effects have been given in the following table. Candidates are also advised to solve as many as JEE Main previous year question papers as possible to crack the exam.

Magnetic Effects JEE Main PYQs

Q1: Given below are two statements :

Statement (I): When currents vary with time, Newton's third law is valid only if momentum carried by the electromagnetic field is taken into account

Statement (II): Ampere's circuital law does not depend on Biot-Savart's law.

In the light of the above statements, choose the correct answer from the options given below :

  1. Both Statement I and Statement II are false
  2. Statement I is false but Statement II is true
  3. C) Both Statement I and Statement II are true
  4. Statement I is true but Statement II is false

April 9, 2024 (Morning Shift)

Q2:  A long straight wire of radius a carries a steady current I. The current is uniformly distributed across its cross-section. The ratio of the magnetic field at a2 and 2a from the axis of the wire is :

  1. 4:1
  2. 3:4
  3. 1:1
  4. 1:4

April 8, 2024 (Evening Shift)


​Q3: An element Delta l= Delta xi^ is placed at the origin and carries a large current  I=10 A. The magnetic field on the y-axis at a distance of    0.5 m from the elements delta x of  1 cm length is:

JEE Main 2024 (Online) 6th April Morning Shift Physics - Magnetic Effect of Current Question 1 English

  1. 10×10−8 T
  2. 8×10−8 T
  3. C 4×10−8 T
  4. 12×10−8 T
April 6, 2024 (Morning Shift)

Q4: A straight magnetic strip has a magnetic moment of  44 Am^2. If the strip is bent in a semicircular shape, its magnetic moment will be ________Am^2  given pi= 22/7

April 9 2024 (Evening Shift)

Q5: A square loop of edge length  2 m carrying current of 2 A is placed with its edges parallel to the x--y axis. A magnetic field is passing through the x-y plane and expressed as B->=B0(1+4x)k^, where B0=5T, The net magnetic force experienced by the loop is _________ N.

April 9, 2024 (Morning Shift)
Q6: A square loop PQRS having 10 turns, area 3.6×10−3 m2 and resistance 100 ohm is slowly and uniformly being pulled out of a uniform magnetic field of magnitude B= 0.5 Tas shown. Work done in pulling the loop out of the field in 1.0 s is _________  ×10−6 J.

JEE Main 2024 (Online) 8th April Morning Shift Physics - Magnetic Effect of Current Question 8 English

April 8, 2024 (Morning Shift)

Q7: An electron with kinetic energy 5 eV enters a region of uniform magnetic field of 3uT perpendicular to its direction. An electric field E is applied perpendicular to the direction of velocity and magnetic field. The value of E, so that the electron moves along the same path, is __________ NC-1. (Given, mass of electron = 9×10−31kg, electric charge = 1.6×10−19C)

April 8, 2024 (Morning Shift)

Also Read: JEE Main Chemistry Syllabus 2025

Best Preparation Tips for the JEE Main 2025 Exam

Candidates preparing for the JEE Main are advised to go through the best preparation tips for the JEE Main 2025 exam to perform well and secure maximum marks in the exam. Check the preparation tips below:

  • Master JEE Mains Syllabus 2025 especially the chapters that hold maximum weightage in the JEE main exam
  • Go through the JEE main 2025 exam pattern
  • Revise the chapters on alternate days after covering it
  • Take the chapter-wise mock test initially and then move to the complete mock test
  • Take the mock test in the exam conditions
  • Stay hydrated and take breaks while preparing to calm and relax the brain

Related Reads

We hope that this article on Magnetic Effects JEE Main Question 2025 has been helpful to you in gaining knowledge about some of the important questions. All the best for your JEE Mains 2025. Stay tuned to CollegeDekho for the latest updates on JEE Main 2025.

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JEE Main Previous Year Question Paper

2022 Physics Shift 1

2022 Physics Shift 2

2022 Chemistry Shift 1

2022 Chemistry Shift 2

2022 Mathematics Shift 1

2022 Mathematics Shift 2

2023 Chemistry Shift 1

2023 Mathematics Shift 1

2023 Physics Shift 2

2023 Mathematics Shift 2

2023 Chemistry Shift 2

2023 Physics Shift 1

2024 Chemistry Shift 1

2024 Mathematics Shift 2

2024 Physics Paper Morning Shift

2024 Mathematics Morning Shift

2024 Physics Shift 2

2024 Chemistry Shift 2

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