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Magnetism Questions

Practice 105 Magnetism questions with detailed answers and explanations. Free MCQs, PYQs, and mock test questions for NEET, JEE, GATE, SSC and more.

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105
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28
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63
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14
Hard
Practice by Exam:Physics(92)Chemistry(8)General Awareness(2)General Science(1)Mathematics and Science(1)PHYSICS(1)

About Magnetism — practice questions, PYQs & concepts

Magnetism is a frequently-tested topic on Physics, Chemistry, General Awareness. ExamTest.live currently lists 105 Magnetism questions spanning previous-year papers from 2018 to 2026, each with worked solutions and a step-by-step explanation. Use the filters on this page to focus on a specific exam, difficulty level or year — every answer key is free, no sign-up required.

Magnetism weight in competitive exams

Across our Magnetism question bank, the largest sources are Physics (92), Chemistry (8), General Awareness (2), General Science (1) and Mathematics and Science (1). Click any exam chip above to drill down to that exam-specific question set.

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All Magnetism Questions(1–100 of 105)

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Q1mediummcqPhysicsAIEEE 20042026
0% accuracy
Two long conductors, separated by a distance carry current and in the same direction. They exert a force on each other. Now the current in one of them increased to two times and its direction reversed. The distance is also increased to . The new value of the force between them is:
Q2mediummcqPhysicsAIEEE 20042026
0% accuracy
The magnetic field due to a current carrying circular loop of radius at a point on the axis at a distance of from the centre is . What will be its value at the centre of the loop?
Q3easymcqPhysicsAIEEE 20042026
0% accuracy
The materials suitable for making electromagnets should have:
Q4easymcqPhysicsAIEEE 20042026
0% accuracy
A current ampere flows along an infinitely long straight thin walled tube, then the magnetic induction at any point inside the tube is:
Q5hardmcqPhysicsAIEEE 20042026
0% accuracy
The length of a magnet is large compared to its width and breadth. The time period of its oscillation in a vibration magnetometer is . The magnet is cut along its length into three equal parts and three parts are then placed on each other with their like poles together. The time period of this combination will be:
Q6mediummcqPhysicsAIEEE 20042026
0% accuracy
A long wire carries a steady current. It is bent into a circle of one turn and the magnetic field at the centre of the coil is . It is then bent into a circular loop of turns. The magnetic field at the centre of the coil will be:
Q7mediummcqPhysicsNEET 20192026
0% accuracy
A cylindrical conductor of radius is carrying a constant current. The plot of the magnitude of the magnetic field with the distance from the centre of the conductor, is correctly represented by the figure:
image
Q8easymcqPhysicsAIEEE 20062026
0% accuracy
Needles and are made of a ferromagnetic, a paramagnetic and a diamagnetic substance respectively. A magnet when brought close to them will:
Q9mediummcqPhysicsAIEEE 20062026
0% accuracy
A long solenoid has turns per cm and carries a current . The magnetic field at its centre is . Another long solenoid has turns per cm and it carries a current . The value of the magnetic field at its centre is:
Q10easymcqPhysicsNEET 20192026
0% accuracy
At a point on the earth’s surface the angle of dip, . At a point on the earth’s surface the angle of dip, . We can interpret that:
Q11mediummcqPhysicsNEET 20192026
0% accuracy
Ionized hydrogen atoms and -particles with same momenta enter perpendicular to a constant magnetic field, . The ratio of their radii of their paths will be:
Q12easymcqPhysicsAIEEE 20062026
0% accuracy
In a region, steady and uniform electric and magnetic fields are present. These two fields are parallel to each other. A charged particle is released from rest in this region. The path of the particle will be a:
Q13mediummcqPhysicsNEET (UG) 20242026
A sheet is placed on a horizontal surface in front of a strong magnetic pole. A force is needed to:A. hold the sheet there if it is magnetic.B. hold the sheet there if it is non-magnetic.C. move the sheet away from the pole with uniform velocity if it is conducting.D. move the sheet away from the pole with uniform velocity if it is both, non-conducting and non-polar.Choose the correct statement(s):
Q14easymcqPhysicsAIEEE2026
A magnetic needle is kept in a non-uniform magnetic field. It experiences:
Q15easymcqPhysicsAIEEE2026
A charged particle of mass and charge travels on a circular path of radius that is perpendicular to a magnetic field . The time taken by the particle to complete one revolution is:
Q16mediummcqPhysicsAIEEE2026
The self inductance of the motor of an electric fan is . In order to impart maximum power at , it should be connected to a capacitance of:
Q17mediummcqPhysicsAIEEE 20032026
A particle of mass and charge moving with velocity describes a circular path of radius when subjected to a uniform transverse magnetic field of induction . The work done by the field when the particle completes one full circle is:
Q18mediummcqPhysicsAIEEE 20032026
A thin rectangular magnet suspended freely has a period of oscillation equal to . Now it is broken into two equal halves (each having half of the original length) and one piece is made to oscillate freely in the same field. If its period of oscillation is , the ratio is:
Q19mediummcqPhysicsAIEEE 20032026
A magnetic needle lying parallel to a magnetic field requires units of work to turn it through . The torque needed to maintain the needle in this position will be:
Q20mediummcqPhysicsAIEEE 20032026
When the current changes from to in second, an e.m.f. of is induced in a coil. The coefficient of self-induction of the coil is:
Q21hardmcqPhysicsAIEEE2026
Relative permittivity and permeability of a material are and . Which values are allowed for a diamagnetic material?
Q22mediummcqPhysicsFIITJEE AIEEE 2011 (Set Q)2026
A boat is moving due east in a region where the earth's magnetic field is due north and horizontal. The boat carries a vertical aerial long. If the speed of the boat is , the magnitude of the induced emf in the wire of aerial is:
Q23mediummcqPhysicsNEET 20172026
A -Turn rectangular coil of length and width carries a current of and subjected to a magnetic field of strength . Work done for rotating the coil by against the torque is:
Q24mediummcqPhysicsAIEEE2026
Two concentric coils each of radius equal to are placed at right angles to each other. and are the currents flowing in each coil respectively. The magnetic induction in Weber/m at the centre of the coils will be ( W/A-m):
Q25hardmcqPhysicsNEET (UG) 20182026
A metallic rod of mass per unit length is lying horizontally on a smooth inclined plane which makes an angle of with the horizontal. The rod is not allowed to slide down by flowing a current through it when a magnetic field of induction is acting on it in the vertical direction. The current flowing in the rod to keep it stationary is:
Q26easymcqPhysicsAIEEE2026
Two thin, long parallel wires separated by a distance ‘ ’ carry a current of ‘ ’ A in the same direction. They will:
Q27mediummcqPhysicsAIEEE2026
Two long parallel wires are at a distance apart. They carry steady equal current flowing out of the plane of the paper. The variation of the magnetic field along the line (perpendicular to wires) is zero at what point?
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Q28mediummcqPhysicsNEET (UG) 20242026
In a uniform magnetic field of , a magnetic needle performs complete oscillations in . The moment of inertia of the needle is . If the magnitude of magnetic moment of the needle is , then the value of ' ' is:
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Q29mediummcqPhysicsNEET (UG) 20242026
An iron bar of length has magnetic moment . It is bent at the middle of its length such that the two arms make an angle with each other. The magnetic moment of this new magnet is:
Q30easymcqPhysicsAIEEE2026
A uniform electric field and a uniform magnetic field are acting along the same direction in a certain region. If an electron is projected along the direction of the fields with a certain velocity then:
Q31easymcqPhysicsAIEEE 20032026
The magnetic lines of force inside a bar magnet:
Q32mediummcqPhysicsAIEEE2026
One conducting U-tube can slide inside another as shown in figure, maintaining electrical contacts between the tubes. The magnetic field is perpendicular to the plane of the figure. If each tube moves towards the other at a constant speed , then the emf induced in the circuit in terms of and where is the width of each tube will be:
image
Q33mediummcqPhysicsAIEEE2026
A coil of inductance and resistance is connected to a source of voltage . The current reaches half of its steady state value in:
Q34mediummsqPhysicsNEET (UG) 20242026
Match List-I with List-II:
image
Q35easymcqPhysicsAIEEE 20032026
Curie temperature is the temperature above which:
Q36easymcqPhysicsAIEEE 20032026
Two coils are placed close to each other. The mutual inductance of the pair of coils depends upon:
Q37easymcqPhysicsAIEEE 20032026
The core of any transformer is laminated so as to:
Q38mediummcqPhysicsAIEEE 20122026
Proton, Deuteron and alpha particle of the same kinetic energy are moving in circular trajectories in a constant magnetic field. The radii of proton, deuteron and alpha particle are respectively , and . Which one of the following relations is correct?
Q39mediummcqPHYSICSNEET 20192026
The relation amongst the three elements of Earth's magnetic field, namely horizontal component , vertical component and dip angle is ( = total magnetic field):
Q40hardmcqPhysicsNEET 20172026
If and be the apparent angles of dip observed in two vertical planes at right angles to each other, then the true angle of dip is given by:
Q41mediummcqPhysicsNEET (UG) 20242026
A tightly wound turns coil of radius carries a current of . The magnitude of the magnetic field at the centre of the coil is (Take permeability of free space as ):
Q42mediummcqPhysicsNEET 20212026
A uniform conducting wire of length and resistance is wound up as a current carrying coil in the shape of (i) an equilateral triangle of side , and (ii) a square of side . The magnetic dipole moments of the coil in each case respectively are:
Q43hardmcqPhysicsFIITJEE AIEEE 2011 (Set Q)2026
A current flows in an infinitely long wire with cross section in the form of a semicircular ring of radius . The magnitude of the magnetic induction along its axis is:
Q44hardmcqPhysicsAIEEE 20122026
A charge is uniformly distributed over the surface of non-conducting disc of radius . The disc rotates about an axis perpendicular to its plane and passing through its centre with an angular velocity . As a result of this rotation a magnetic field of induction is obtained at the centre of the disc. If we keep both the amount of charge placed on the disc and its angular velocity to be constant and vary the radius of the disc then the variation of the magnetic induction at the centre of the disc will be represented by:
image
Q45mediummcqGeneral ScienceCompetitive Exam2026
At magnetic poles, the angle of dip is
Q46mediummcqPhysicsJEE Main2026
Two short bar magnets of length each have magnetic moments and respectively. They are placed on a horizontal table parallel to each other with their poles pointing towards the South. They have a common magnetic equator and are separated by a distance of . The value of the resultant horizontal magnetic induction at the mid-point of the line joining their centres is close to ():
Q47mediummcqPhysicsNEET 20222026
The dimensions belong to the:
Q48mediummcqPhysicsNEET 20212026
A thick current cable of radius carries current uniformly distributed across its cross-section. The variation of magnetic field due to the cable with the distance from the axis of the cable is represented by:
image
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Q49mediummcqGeneral AwarenessPractice Paper2026
Which scientific principle explains why a compass needle points north?
Q50mediummcqPhysicsNEET 20212026
Two conducting circular loops of radii and are placed in the same plane with their centres coinciding. If , the mutual inductance between them will be directly proportional to:
Q51mediummcqPhysicsNEET 20222026
A long solenoid of radius has . If current flows in the solenoid, the magnetic field strength at the centre of the solenoid is:
Q52mediummcqPhysicsNEET 20222026
From Ampere’s circuital law for a long straight wire of circular cross-section carrying a steady current, the variation of magnetic field in the inside and outside region of the wire is:
Q53mediummcqGeneral AwarenessIndian Competitive Exams2026
Which metallic element is called 'ferromagnetic' because of its strong attraction?
Q54mediummcqPhysicsNEET 20222026
Given below are two statements:Statement I: Biot-Savart's law gives the expression for the magnetic field strength of an infinitesimal current element () of a current carrying conductor only.Statement II: Biot-Savart’s law is analogous to Coulomb's inverse square law of charge , with the former being related to the field produced by a scalar source, while the latter being produced by a vector source, .In light of above statements choose the most appropriate answer:
Q55mediummcqChemistryJEE Main2026
Which one of the following molecules is expected to exhibit diamagnetic behaviour?
Q56hardmcqPhysicsNEET 20232026
A very long conducting wire is bent in a semi-circular shape from A to B as shown in the figure. The magnetic field at point P for steady current configuration is:
image
Q57easymcqPhysicsNEET 20232026
The net magnetic flux through any closed surface is:
Q58easymcqPhysicsNEET 20232026
The magnetic energy stored in an inductor of inductance carrying a current of is:
Q59hardmcqPhysicsNEET 20232026
A wire carrying a current along the positive -axis has length . It is kept in a magnetic field . The magnitude of the magnetic force acting on the wire is:
Q60easymcqPhysicsNEET (UG) 20182026
A thin diamagnetic rod is placed vertically between the poles of an electromagnet. When the current in the electromagnet is switched on, then the diamagnetic rod is pushed up, out of the horizontal magnetic field. Hence the rod gains gravitational potential energy. The work required to do this comes from:
Q61mediummcqPhysicsNEET (UG) 20242026
In the diagrams below, a strong bar magnet is moving towards solenoid-2 from solenoid-1 with velocity . The magnet is oriented with its North pole (N) facing solenoid-2 and South pole (S) facing solenoid-1. The direction of induced current in solenoid-1 and that in solenoid-2, respectively, are through the directions:
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Q62easymcqMathematics and ScienceUPTET Paper 2 (Maths & Science)2018
Which one of the following materials is ferromagnetic?
Q63hardmcqChemistryChemistry
2% accuracy
Given below are two statements:Statement I: Ferromagnetism is considered as an extreme form of paramagnetism.Statement II: The number of unpaired electrons in a ion () is the same as that of a ion ().In the light of the above statements, choose the correct answer from the options given below:
Q64mediummcqPhysicsPhysics
0% accuracy
A current is flowing through two different small circular copper coils having radii ratio . The ratio of their respective magnetic moments will be:
Q65mediummcqPhysicsPhysics
0% accuracy
If the magnetic dipole moment of an atom of diamagnetic material, paramagnetic material and ferromagnetic material are denoted by µd, µp and µf respectively, then :
Q66mediummcqPhysicsPhysics
0% accuracy
A uniform electric field and a uniform magnetic field are acting along the same direction in certain region. If an electron is projected in the region such that its velocity is pointed along direction of fields, then the electron:
Q67mediummcqChemistryChemistry
0% accuracy
The -electron configurations of and are and respectively. Which one of the following will exhibit minimum paramagnetic behaviour?
Q68mediummcqChemistryChemistry
0% accuracy
Of the following complex ions, which is diamagnetic in nature?
Q69mediummcqPhysicsPhysics
0% accuracy
A current carrying closed loop in the form of a right angle isosceles triangle is placed in a uniform magnetic field acting along . If the magnetic force on the arm is , the force on the arm is:
image
Q70mediummcqPhysicsPhysics
0% accuracy
There are four light-weight-rod samples, separately suspended by threads. A bar magnet is slowly brought near each sample and the following observations are noted: (i) is feebly repelled (ii) is feebly attracted (iii) is strongly attracted (iv) remains unaffected. Which one of the following is true?
Q71easymcqPhysicsPhysics
0% accuracy
Nickel shows ferromagnetic property at room temperature. If the temperature is increased beyond Curie temperature, then it will show:
Q72mediummcqPhysicsPhysics
100% accuracy
Under the influence of a uniform magnetic field a charged particle is moving in a circle of radius with constant speed . The time period of the motion:
Q73mediummcqPhysicsPhysics
0% accuracy
A charged particle (charge ) is moving in a circle of radius with uniform speed . The associated magnetic moment is given by:
Q74easymcqPhysicsPhysics
0% accuracy
A beam of electrons passes un-deflected through mutually perpendicular electric and magnetic fields. If the electric field is switched off, and the same magnetic field is maintained, the electrons move:
Q75hardmcqPhysicsPhysics
A closed loop carrying a current is placed in a uniform magnetic field. If the magnetic forces on segments , , and are , , and respectively and are in the plane of the paper and along the directions shown, the force on the segment is:
Q76mediummcqChemistryChemistry
The diamagnetic species is:
Q77mediummcqPhysicsPhysics
A circular disc of radius is placed in a uniform magnetic field of induction in such a way that its axis makes an angle of with . The magnetic flux linked with the disc is:
Q78mediummcqChemistryChemistry
Which one of the following is an outer orbital complex and exhibits paramagnetic behaviour?
Q79easymcqPhysicsPhysics
A compass needle which is allowed to move in a horizontal plane is taken to a geomagnetic pole. It:
Q80easymcqPhysicsPhysics
Curie temperature is the temperature above which:
Q81hardmcqPhysicsPhysics
A proton released from rest starts with acceleration towards west. When projected towards north with speed , it moves with initial acceleration towards west. The electric and magnetic fields in the room are:
Q82easymcqPhysicsPhysics
A current loop in a magnetic field:
Q83mediummcqPhysicsPhysics
A very long straight wire carries a current I. At the instant when a charge + Q at point P has velocity , as shown, the force on the charge is :
Q84hardmcqChemistryChemistry
Assertion : Potassium ferrocyanide is diamagnetic whereas potassium ferricyanide is paramagnetic.Reason : Crystal field splitting in ferrocyanide ion is greater than that of ferricyanide ion.
Q85easymcqPhysicsPhysics
A bar magnet having a magnetic moment of is free to rotate in a horizontal plane. A horizontal magnetic field exists in the space. The work done in taking the magnet slowly from a direction parallel to the field to a direction from the field is:
Q86mediummcqPhysicsPhysics
A bar magnet of length and magnetic dipole moment is bent in the form of an arc subtending at the center. The new magnetic dipole moment will be:
image
Q87easymcqPhysicsPhysics
Following figures show the arrangement of bar magnets in different configurations. Each magnet has magnetic dipole moment . Which configuration has highest net magnetic dipole moment?
image
Q88easymcqPhysicsPhysics
If a diamagnetic substance is brought near the north or the south pole of a bar magnet, it is:
Q89mediummcqPhysicsPhysics
Two identical long conducting wires and are placed at right angle to each other, with one above other such that ' ' is their common point. The wires carry and currents, respectively. Point ' ' is lying at distance ' ' from ' ' along a direction perpendicular to the plane containing the wires. The magnetic field at point ' ' will be:
Q90mediummcqPhysicsPhysics
A rectangular coil of length and width having turns of wire is suspended vertically in a uniform magnetic field of strength . The coil carries a current of . If the plane of the coil is inclined at an angle of with the direction of the field, the torque required to keep the coil in stable equilibrium will be:
Q91hardmcqChemistryChemistry
Assertion : molecule is diamagnetic.Reason : The highest occupied molecular orbital is of type.
Q92easymcqPhysicsPhysics
A square current carrying loop is suspended in a uniform magnetic field acting in the plane of the loop. If the force on one arm of the loop is , the net force on the remaining three arms of the loop is:
Q93mediummcqPhysicsPhysics
A proton and an alpha particle both enter a region of uniform magnetic field , moving at right angles to the field . If the radius of circular orbits for both the particles is equal and the kinetic energy acquired by proton is , the energy acquired by the alpha particle will be:
Q94mediummcqPhysicsPhysics
A thin ring of radius has charge uniformly spread on it. The ring rotates about its axis with a constant frequency of . The value of magnetic induction in at the centre of the ring is:
Q95easymcqPhysicsPhysics
Electromagnets are made of soft iron because soft iron has:
Q96hardmcqPhysicsPhysics
A vibration magnetometer placed in magnetic meridian has a small bar magnet. The magnet executes oscillations with a time period of in earth's horizontal magnetic field of . When a horizontal field of is produced opposite to the earth's field by placing a current carrying wire, the new time period of magnet will be:
Q97mediummcqPhysicsPhysics
A conducting circular loop is placed in a uniform magnetic field, with its plane perpendicular to the loop. The radius of the loop is made to shrink at a constant rate of . The induced emf when the radius is is:
Q98mediummcqPhysicsPhysics
The magnetic moment of a revolving electron around the nucleus varies with principal quantum number as:
Q99mediummcqPhysicsPhysics
A input is supplied to a transformer. The output circuit draws a current of at . If the efficiency of the transformer is , the current drawn by the primary windings of the transformer is:
Q100mediummcqPhysicsPhysics
Charge is spread on a ring of radius rotating at frequency . Magnetic induction at center is:
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