Physics · JEE Main

Magnetic Properties of Matter

57 practice questions with a worked solution for each. Tap an option to see instantly if you are right.

53MCQ4Numerical9With diagram
Start with question 1
  1. 1Two identical small bar magnets each of dipole moment 353\sqrt{5} J/T are placed at a center to center separation of 1010 cm, with their axes perpendicular to each other as shown in figure. The value of magnetic field at the point P midway between the magnets is α×10−3\alpha \times 10^{-3} T. The value of α\alpha is ______.
    (    μ0=4π×10−7\mu_0=4\pi \times 10^{-7} Tm/A)
    JEE Main/Numerical/Medium/Magnetism and Properties of Magnet/With diagram
  2. 2A solenoid has a core made of material with relative permeability 400400. The magnetic field produced in the interior of solenoid is 1.01.0 T. The magnetic intensity in SI units is α×105\alpha \times 10^5. The value of α\alpha is ______.
    (Free space permeability     μ0=4π×10−7\mu_0=4\pi \times 10^{-7} SI units.)    JEE Main/MCQ/Medium/Magnetism and Properties of Magnet
  3. 3Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason(R).
    Assertion (A) : Magnetic monopoles do not exist.
    Reason (R) : Magnetic field lines are continuous and form closed loops.
    In the light of the above statements, choose the most appropriate answer from the options given below :    JEE Main/MCQ/Medium/Magnetism and Properties of Magnet
  4. 4The percentage increase in magnetic field (B) when space within a current carrying solenoid is filled with magnesium (magnetic susceptibility χmg=1.2×10−5)\left.\chi_{\mathrm{mg}}=1.2 \times 10^{-5}\right) is :JEE Main/MCQ/Medium/Magnetism and Properties of Magnet
  5. 5A solenoid having area AA and length ' ll ' is filled with a material having relative permeability 2. The magnetic energy stored in the solenoid is :JEE Main/MCQ/Medium/Magnetism and Properties of Magnet
  6. 6The relationship between the magnetic susceptibility (χ)(\chi) and the magnetic permeability (μ)(\mu) is given by :
    (    μ0\mu_0 is the permeability of free space and μr\mu_{\mathrm{r}} is relative permeability)    JEE Main/MCQ/Medium/Magnetism and Properties of Magnet
  7. 7

    A bar magnet has total length     2l=202 l=20 units and the field point PP is at a distance d=10\mathrm{d}=10 units from the centre of the magnet. If the relative uncertainty of length measurement is 1%1 \%, then uncertainty of the magnetic field at point P is :    JEE Main/MCQ/Medium/Magnetism and Properties of Magnet/With diagram
  8. 8The coercivity of a magnet is 5×103 A/m5 \times 10^3 \mathrm{~A} / \mathrm{m}. The amount of current required to be passed in a solenoid of length 30 cm30 \mathrm{~cm} and the number of turns 150 , so that the magnet gets demagnetised when inside the solenoid is _____A.JEE Main/Numerical/Medium/Magnetism and Properties of Magnet
  9. 9Match List-I with List-II :


    Choose the correct answer from the options given below :    JEE Main/MCQ/Medium/Magnetism and Properties of Magnet/With diagram
  10. 10The magnetic moment of a bar magnet is 0.5Am20.5 \mathrm{Am}^2. It is suspended in a uniform magnetic field of 8×10−2 T8 \times 10^{-2} \mathrm{~T}. The work done in rotating it from its most stable to most unstable position is:JEE Main/MCQ/Medium/Magnetism and Properties of Magnet
  11. 11Given below are two statements: one is labelled as
    Assertion     AA and the other is labelled as Reason RR
    Assertion     AA: A bar magnet dropped through a metallic cylindrical pipe takes more time to come down compared to a non-magnetic bar with same geometry and mass.
    Reason     RR: For the magnetic bar, Eddy currents are produced in the metallic pipe which oppose the motion of the magnetic bar.
    In the light of the above statements, choose the correct answer from the options given below    JEE Main/MCQ/Medium/Magnetism and Properties of Magnet
  12. 12A bar magnet is released from rest along the axis of a very long vertical copper tube. After some time the magnet willJEE Main/MCQ/Medium/Magnetism and Properties of Magnet
  13. 13The current required to be passed through a solenoid of 15cm15cm length and 6060 turns in order to demagnetise a bar magnet of magnetic intensity 2.4×103Am–12.4\times {10}^{3}A{m}^{–1} is ________ AA.JEE Main/Numerical/Medium/Magnetism and Properties of Magnet
  14. 14Certain galvanometers have a fixed core made of non magnetic metallic material. The function of this metallic material isJEE Main/MCQ/Medium/Magnetism and Properties of Magnet
  15. 15The soft-iron is a suitable material for making an electromagnet. This is because soft-iron hasJEE Main/MCQ/Medium/Magnetism and Properties of Magnet
  16. 16In a uniform magnetic field, the magnetic needle has a magnetic moment 9.85×10−2Am−29.85\times {10}^{-2}A{m}^{-2} and moment of inertia 5×10−6kgm2.5\times {10}^{-6}kg{m}^{2}. If it performs 1010 complete oscillations in 55 seconds then the magnitude of the magnetic field is ____mTmT [Take π2{\pi }^{2} as 9.85]\left.9.85\right]JEE Main/Numerical/Medium/Magnetism and Properties of Magnet
  17. 17Which of the following statements are correct?
    (A) Electric monopoles do not exist whereas magnetic monopoles exist.
    (B) Magnetic field lines due to a solenoid at its ends and outside cannot be completely straight and confined.
    (C) Magnetic field lines are completely confined within a toroid.
    (D) Magnetic field lines inside a bar magnet are not parallel.
    (E)     χ=−1\chi =-1 is the condition for a perfect diamagnetic material, where χ\chi is its magnetic susceptibility.
    Choose the correct answer from the options given below :    JEE Main/MCQ/Medium/Magnetism and Properties of Magnet
  18. 18A small bar magnet is placed with its axis at 30o{30}^{o} with an external magnetic field of 0.06T0.06T experiences a torque of 0.018Nm0.018Nm. The minimum work required to rotate it from its stable to unstable equilibrium position is:JEE Main/MCQ/Medium/Magnetism and Properties of Magnet
  19. 19A magnetic compass needle oscillates 3030 times per minute at a place where the dip is 45∘45^{\circ} and 4040 times per minute where the dip is 30∘30^{\circ}. If B1{B}_{1} and B2{B}_{2} are the net magnetic fields due to the earth at the two places respectively, then the ratio B1/B2{B}_{1}/{B}_{2} is approximately equal toJEE Main/MCQ/Medium/Magnetism and Properties of Magnet
  20. 20Two coils ′P′'P' and ′Q′'Q' are separated by some distance. When a current of 3A3A flows through coil ′P′,'{P}^{'}, a magnetic flux of 10−3Wb{10}^{-3}Wb passes through ′Q′.'{Q}^{'}. No current is passed through ′Q′.'{Q}^{'}. When no current passes through ′P′'P' and a current of 2A2A passes through ′Q′,'{Q}^{'}, the flux through ′P′'P' is:JEE Main/MCQ/Medium/Magnetism and Properties of Magnet
  21. 21A magnet of total magnetic moment 10−2i^Am2{10}^{-2}\hat{i}A{m}^{2} is placed in a time varying magnetic field, Bi^(cos⁡ωt)B\hat{i}\left(\cos \omega t\right) where B=1B=1 Tesla and ω=0.125rads−1\omega =0.125rad{s}^{-1}. The work done for reversing the direction of the magnetic moment at t=1t=1 second, is:JEE Main/MCQ/Medium/Magnetism and Properties of Magnet
  22. 22A bar magnet is demagnetized by inserting it inside a solenoid of length 0.2m,1000.2m,100 turns, and carrying a current of 5.2A.5.2A. The coercivity of the bar magnet is:JEE Main/MCQ/Medium/Magnetism and Properties of Magnet
  23. 23A short bar magnet is placed in the magnetic meridian of the earth with North Pole pointing north. Neutral points are found at a distance of 30cm30cm from the magnet on the East-West line, drawn through the middle point of the magnet. The magnetic moment of the magnet in Am2{Am}^{2} is close to:

    (Given     μ04π=10−7\dfrac{{\mu }_{0}}{4\pi }={10}^{-7} in SI units and BH={B}_{H}= Horizontal component of earth's magnetic field =3.6×10−5=3.6\times {10}^{-5} Tesla.)    JEE Main/MCQ/Medium/Magnetism and Properties of Magnet
  24. 24A 25cm25cm long solenoid has the radius 2cm2cm and 500500 turns. It carries a current of 15A15A. If it is equivalent to a magnet of the same size and magnetization M⃗(Magneticmomentvolume),\vec{M}\left(\dfrac{Magneticmoment}{volume}\right),then ∣M⃗∣\left|\vec{M}\right| is:JEE Main/MCQ/Medium/Magnetism and Properties of Magnet
  25. 25The mid points of two small magnetic dipoles of length dd in end-on positions, are separated by a distance xx(x≫d)\left(x≫d\right). The magnitude of force between them is proportional to x−n{x}^{-n} where nn is :

    JEE Main/MCQ/Medium/Magnetism and Properties of Magnet/With diagram
  26. 26Choose the correct sketch of the magnetic field lines of a circular current loop shown by the dot
     and the cross ⊗. \text { and the cross } \otimes \text {. }    JEE Main/MCQ/Medium/Magnetism and Properties of Magnet
  27. 27Two short bar magnets of length 1cm1cm each have magnetic moments 1.20Am21.20A{m}^{2} and 1.00Am21.00A{m}^{2} respectively. They are placed on a horizontal table parallel to each other with their N\text{N} poles pointing towards the south. They have a common magnetic equator and are separated by a distance of 20.0cm20.0cm. The value of the resultant horizontal magnetic induction at the mid-point O\text{O} of the line joining their centres is close to
    ( Horizontal component of earth's magnetic induction is     3.6×10−5Wbm−23.6\times {10}^{-5}Wb{m}^{-2} )    JEE Main/MCQ/Medium/Magnetism and Properties of Magnet
  28. 28A bar magnet of length 6 cm6 \mathrm{~cm} has a magnetic moment of 4 J T−14 \mathrm{~J} \mathrm{~T}^{-1}. Find the strength of magnetic field at a distance of 200 cm200 \mathrm{~cm} from the centre of the magnet along its equatorial line.JEE Main/MCQ/Medium/Magnetism and Properties of Magnet
  29. 29Needles N1, N2\mathrm{N}_1, \mathrm{~N}_2 and N3\mathrm{N}_3 are made of a ferromagnetic, a paramagnetic and a diamagnetic substance respectively. A magnet when brought close to them willJEE Main/MCQ/Medium/Magnetism and Properties of Magnet
  30. 30A magnetic needle is kept in a non-uniform magnetic field. It experiencesJEE Main/MCQ/Medium/Magnetism and Properties of Magnet
  31. 31The length of a magnet is large compared to its width and breadth. The time period of its width and breadth. The time period of its oscillation in a vibration magnetometer is 2 s2 \mathrm{~s}. 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 beJEE Main/MCQ/Medium/Magnetism and Properties of Magnet
  32. 32The magnetic lines of force inside a bar magnetJEE Main/MCQ/Medium/Magnetism and Properties of Magnet
  33. 33A magnetic needle lying parallel to a magnetic field requires W\mathrm{W} units of work to turn it through 60∘60^{\circ}. The torque needed to maintain the needle in this position will beJEE Main/MCQ/Medium/Magnetism and Properties of Magnet
  34. 34A thin rectangular magnet suspended freely has a period of oscillation equal to TT. 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 T′T^{\prime}, the ratio T′T\frac{T^{\prime}}{T} isJEE Main/MCQ/Medium/Magnetism and Properties of Magnet
  35. 35A magnetic needle of magnetic moment 6.7×10−2Am26.7\times {10}^{-2}A{m}^{2} and moment of inertia 7.5×10−6kgm27.5\times {10}^{-6}kg{m}^{2} is performing simple harmonic oscillations in a magnetic field of 0.01T0.01T. Time taken for 1010 complete oscillations is:JEE Main/MCQ/Medium/Magnetic Equipments
  36. 36Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R).
    Consider a ferromagnetic material :
    Assertion (A) : The individual atoms in a ferromagnetic material possess a magnetic dipole moment and interact with one another in such a way that they spontaneously align themselves forming domains.
    Reason (R): At high enough temperature, the domain structure of ferromagnetic material disintegrates. Thus, magnetization will disappear at high enough temperature known as Curie temperature.
    In the light of the above statements, choose the correct answer from the options given below :    JEE Main/MCQ/Medium/Magnetic Materials and their Properties
  37. 37Paramagnetic substances:
    A. align themselves along the directions of external magnetic field.
    B. attract strongly towards external magnetic field.
    C. has susceptibility little more than zero.
    D. move from a region of strong magnetic field to weak magnetic field.
    Choose the most appropriate answer from the options given below:    JEE Main/MCQ/Medium/Magnetic Materials and their Properties
  38. 38Given below are two statements:
    Statement I : The diamagnetic property depends on temperature.
    Statement II : The induced magnetic dipole moment in a diamagnetic sample is always opposite to the magnetising field.
    In the light of given statements, choose the correct answer from the options given below    JEE Main/MCQ/Medium/Magnetic Materials and their Properties
  39. 39Given below are two statements:
    Statement I: For diamagnetic substance     −1≤x<0-1\leq x\lt 0, where xx is the magnetic susceptibility.
    Statement II: Diamagnetic substance when placed in an external magnetic field, tend to move from stronger to weaker part of the field. In the light of the above statements, choose the correct answer from the options give below.    JEE Main/MCQ/Medium/Magnetic Materials and their Properties
  40. 40Given below are two statements: one is labelled as Assertion AA and the other is labelled as Reason RR.
    Assertion A : Electromagnets are made of soft iron.
    Reason R : Soft iron has high permeability and low retentivity.
    In the light of above statements, choose the most appropriate answer from the options given below.    JEE Main/MCQ/Medium/Magnetic Materials and their Properties
  41. 41The susceptibility of a paramagnetic material is 9999. The permeability of the material in Wb/A−mWb/A-m, is [Permeability of free space μ0=4π×10−7Wb/A−m{\mu }_{0}=4\pi \times {10}^{-7}Wb/A-m]JEE Main/MCQ/Medium/Magnetic Materials and their Properties
  42. 42Given below are two statements :
    Statement - I : Susceptibilities of paramagnetic and ferromagnetic substances increase with decrease in temperature.
    Statement - II : Diamagnetism is a result of orbital motions of electrons developing magnetic moments opposite to the applied magnetic field.
    Choose the correct answer from the options given below    JEE Main/MCQ/Medium/Magnetic Materials and their Properties
  43. 43Following plots show Magnetization (M)(M) vs Magnetising field (H)(H) and Magnetic susceptibility (χ)(\chi ) vs Temperature (T)(T) graph :

    Which of the following combination will be represented by a diamagnetic material?    JEE Main/MCQ/Medium/Magnetic Materials and their Properties/With diagram
  44. 44Statement I : The ferromagnetic property depends on temperature. At high temperature, ferromagnet becomes paramagnet.
    Statement II : At high temperature, the domain wall area of a ferromagnetic substance increases. In the light of the above statements, choose the most appropriate answer from the options given below:    JEE Main/MCQ/Medium/Magnetic Materials and their Properties
  45. 45In a ferromagnetic material, below the curie temperature, a domain is defined as:JEE Main/MCQ/Medium/Magnetic Materials and their Properties
  46. 46A soft ferromagnetic material is placed in an external magnetic field. The magnetic domains:JEE Main/MCQ/Medium/Magnetic Materials and their Properties
  47. 47A paramagnetic sample shows a net magnetisation of 6A/m6A/m when it is placed in an external magnetic field of 0.4T0.4T at a temperature of 4K4K. When the sample is placed in an external magnetic field of 0.3T0.3T at a temperature of 24K24K, then the magnetisation will be :JEE Main/MCQ/Medium/Magnetic Materials and their Properties
  48. 48A perfectly diamagnetic sphere has a small spherical cavity at its centre, which is filled with a paramagnetic substance. The whole system is placed in a uniform magnetic field B⃗\vec{B}. Then the field inside the paramagnetic substance is:
    JEE Main/MCQ/Medium/Magnetic Materials and their Properties/With diagram
  49. 49
    The figure gives experimentally measured     BB vs. HH variation in a ferromagnetic material. The retentivity, coercivity and saturation, respectively, of the material are:    JEE Main/MCQ/Medium/Magnetic Materials and their Properties/With diagram
  50. 50A paramagnetic material has 1028atomsm−3{10}^{28}atoms{m}^{-3}. Its magnetic susceptibility at temperature 350K350K is 2.8A~—10−42.8×{10}^{-4}. Its susceptibility at 300K300K isJEE Main/MCQ/Medium/Magnetic Materials and their Properties
  51. 51The B−HB-H curve for a ferromagnet is shown in the figure. The ferromagnet is placed inside a long solenoid with 1000turnscm−11000turns{cm}^{-1}. The current that should be passed in the solenoid to demagnetize the ferromagnet completely is,
    JEE Main/MCQ/Medium/Magnetic Materials and their Properties/With diagram
  52. 52An example of a perfect diamagnet is a superconductor. This implies that when a superconductor is put in a magnetic field of intensity BB, the magnetic field Bs{B}_{s} inside the superconductor will be such thatJEE Main/MCQ/Medium/Magnetic Materials and their Properties
  53. 53Three identical bars A, B and C are made of different magnetic materials. When kept in a uniform magnetic field, the field lines around them look as follows:




    Make the correspondence of these bars with their material being diamagnetic (     D)\mathrm{D}), ferromagnetic (F) and paramagnetic (P)(\mathrm{P}) :    JEE Main/MCQ/Medium/Magnetic Materials and their Properties/With diagram
  54. 54The coercivity of a small magnet, where the ferromagnet gets demagnetised is 3×103A/m3\times {10}^{3}A/m. The current required to be passed in a solenoid of length 10cm10cm and number of turns 100100, so that the magnet gets demagnetised when inside the solenoid isJEE Main/MCQ/Medium/Magnetic Materials and their Properties
  55. 55Relative permittivity and permeability of a material are εr\varepsilon_{\mathrm{r}} and μr\mu_{\mathrm{r}}, respectively. Which of the following values of these quantities are allowed for a diamagnetic material?JEE Main/MCQ/Medium/Magnetic Materials and their Properties
  56. 56The materials suitable for making electromagnets should haveJEE Main/MCQ/Medium/Magnetic Materials and their Properties
  57. 57Curie temperature is the temperature above whichJEE Main/MCQ/Medium/Magnetic Materials and their Properties

JEE Main question paper PDF

This chapter includes JEE Main questions. Open a shift to read the paper, or download the PDF.

JEE Main 2025 Apr 2 Shift 1 question paper

Open Download PDF

Opening paper…

Other Physics chapters

Current Electricity 380Electrostatics 311Kinematics 308Ray Optics 295Rotational Motion 280Magnetic Effects & Magnetism 276Atoms & Nuclei 239Gravitation 223Laws of Motion 210Semiconductors 209Dual Nature of Matter 200Oscillations 194Fluid Mechanics 192Wave Optics 191Alternating Current 190Thermodynamics 190Work Energy Power 183Capacitors 180Kinetic Theory 168Electromagnetic Waves 165Electromagnetic Induction 153Units & Dimensions 149Waves 142Center of Mass, Momentum & Collision 130Thermal Properties of Matter 126Mathematics in Physics 121Mechanical Properties of Solids 118Experimental Physics 70Modern Physics 5

Stuck on a Magnetic Properties of Matter question from your book?

Snap it and get a whiteboard video that solves it step by step. Your first video needs no login.

Scan a doubtView plans