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Magnetism and Matter Class 12 Physics MCQs 2026-27 | CBSE
CBSE Class 12 Physics • Chapter 5
Magnetism and Matter — MCQs with Answers
50 original multiple-choice questions for CBSE Class 12 Physics 2026–27, designed for concept revision, board-style objective practice and quick self-testing.
50 MCQsAnswers + Explanations2026–27 Scope-AwareScope first: The official CBSE 2026–27 curriculum places Chapters 4 and 5 in Unit III, “Magnetic Effects of Current and Magnetism,” carrying 17 marks for the unit. Chapter 5 explicitly includes the bar magnet, equivalent-solenoid idea, qualitative dipole field along/perpendicular to the axis, torque on a magnetic dipole in a uniform field, magnetic field lines, magnetic materials, magnetisation and temperature effects. See the official curriculum.
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How to Use These Magnetism and Matter MCQs
Best method: Attempt every question before opening the explanation. Mark questions you guessed. After checking, revise the underlying concept from the Magnetism and Matter Class 12 Physics Notes, then retry the missed questions.
- Round 1: Solve Q1–20 without notes.
- Round 2: Solve Q21–40 and focus on material properties, magnetisation and temperature effects.
- Round 3: Attempt Q41–50 as the clearly labelled official-SQP-linked extension.
- Exam habit: Read every option completely. Several questions are designed around common reversals such as N→S vs S→N, positive vs negative susceptibility, and zero vs maximum torque.
Core Chapter 5 MCQs — 1 to 40
These questions stay focused on the concepts explicitly named in the current Chapter 5 syllabus, with only the minimum Chapter 4 bridge needed for magnetic dipole moment and torque relationships.
Q1.A bar magnet behaves most closely like aFoundation
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Correct answer: B
A bar magnet has two opposite magnetic poles and is therefore represented as a magnetic dipole.
A bar magnet has two opposite magnetic poles and is therefore represented as a magnetic dipole.
Q2.The magnetic field lines outside a bar magnet are directedFoundation
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Correct answer: B
Outside a bar magnet, conventional magnetic field lines emerge from the north pole and enter the south pole.
Outside a bar magnet, conventional magnetic field lines emerge from the north pole and enter the south pole.
Q3.The magnetic field lines inside a bar magnet are directedFoundation
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Correct answer: B
Magnetic field lines form closed loops, so inside the magnet they run from S to N.
Magnetic field lines form closed loops, so inside the magnet they run from S to N.
Q4.Which statement about magnetic field lines is correct?Foundation
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Correct answer: C
The tangent to a field line at a point indicates the direction of the magnetic field at that point.
The tangent to a field line at a point indicates the direction of the magnetic field at that point.
Q5.A magnetic dipole moment is associated with theFoundation
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Correct answer: A
Magnetic dipole moment describes the strength and orientation of a magnetic dipole.
Magnetic dipole moment describes the strength and orientation of a magnetic dipole.
Q6.The SI unit of magnetic dipole moment isFoundation
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Correct answer: C
Magnetic dipole moment has SI unit ampere metre squared (A m²).
Magnetic dipole moment has SI unit ampere metre squared (A m²).
Q7.For a current-carrying coil, the magnetic dipole moment magnitude isFoundation
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Correct answer: B
For a coil of N turns carrying current I and area A, m = NIA.
For a coil of N turns carrying current I and area A, m = NIA.
Q8.The magnetic dipole moment of a current loop is directed according to theFoundation
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Correct answer: B
Curl the fingers in the current direction; the thumb gives the magnetic dipole moment direction.
Curl the fingers in the current direction; the thumb gives the magnetic dipole moment direction.
Q9.A bar magnet can be represented qualitatively as an equivalentFoundation
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Correct answer: B
A current-carrying solenoid produces a magnetic field pattern similar to that of a bar magnet.
A current-carrying solenoid produces a magnetic field pattern similar to that of a bar magnet.
Q10.The equivalence of a bar magnet and a solenoid is primarily aFoundation
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Correct answer: A
At this level, the bar-magnet/solenoid equivalence is used qualitatively to compare their magnetic-field patterns.
At this level, the bar-magnet/solenoid equivalence is used qualitatively to compare their magnetic-field patterns.
Q11.At a point on the axial line of a bar magnet, the point liesFoundation
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Correct answer: B
The axial position is along the line joining the two poles, i.e. along the dipole axis.
The axial position is along the line joining the two poles, i.e. along the dipole axis.
Q12.A point on the equatorial line of a magnetic dipole liesFoundation
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Correct answer: B
The equatorial line is the perpendicular bisector of the dipole axis.
The equatorial line is the perpendicular bisector of the dipole axis.
Q13.For Chapter 5's prescribed field-of-a-dipole treatment, the axial and equatorial field results are emphasizedApplication
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Correct answer: A
The current CBSE 2026–27 syllabus specifies the magnetic field of a bar magnet along and perpendicular to its axis qualitatively.
The current CBSE 2026–27 syllabus specifies the magnetic field of a bar magnet along and perpendicular to its axis qualitatively.
Q14.The torque on a magnetic dipole in a uniform magnetic field is maximum when the angle between m and B isApplication
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Correct answer: D
τ = mB sinθ, so torque is maximum when sinθ = 1, i.e. θ = 90°.
τ = mB sinθ, so torque is maximum when sinθ = 1, i.e. θ = 90°.
Q15.The torque on a magnetic dipole is zero when the dipole isApplication
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Correct answer: B
For θ = 0° or 180°, sinθ = 0, so the torque is zero.
For θ = 0° or 180°, sinθ = 0, so the torque is zero.
Q16.If the magnetic dipole moment is doubled while B and θ remain unchanged, the torqueApplication
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Correct answer: C
From τ = mB sinθ, torque is directly proportional to m.
From τ = mB sinθ, torque is directly proportional to m.
Q17.If θ = 30° for a magnetic dipole in a uniform field, the torque magnitude isApplication
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Correct answer: C
τ = mB sin30° = mB/2.
τ = mB sin30° = mB/2.
Q18.A magnetic dipole placed in a uniform magnetic field experiencesApplication
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Correct answer: A
Except for parallel or antiparallel orientations, the field produces a torque tending to rotate the dipole.
Except for parallel or antiparallel orientations, the field produces a torque tending to rotate the dipole.
Q19.Which statement about a uniform magnetic field is most appropriate?Application
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Correct answer: A
Uniform means the magnetic field vector is constant in magnitude and direction throughout the considered region.
Uniform means the magnetic field vector is constant in magnitude and direction throughout the considered region.
Q20.A magnetic field line is drawn closer to neighbouring field lines where the field isApplication
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Correct answer: A
Greater field-line density is used to represent a relatively stronger magnetic field.
Greater field-line density is used to represent a relatively stronger magnetic field.
Q21.Which statement about magnetic field lines is false?Application
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Correct answer: D
Isolated magnetic monopoles have not been observed; magnetic field lines form closed loops.
Isolated magnetic monopoles have not been observed; magnetic field lines form closed loops.
Q22.Diamagnetic substances are generallyApplication
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Correct answer: B
Diamagnetic substances develop a weak induced magnetic moment opposite to the applied field and are weakly repelled.
Diamagnetic substances develop a weak induced magnetic moment opposite to the applied field and are weakly repelled.
Q23.The magnetic susceptibility of a diamagnetic substance is generallyApplication
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Correct answer: A
Diamagnetic susceptibility is small and negative.
Diamagnetic susceptibility is small and negative.
Q24.Paramagnetic substances are generallyApplication
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Correct answer: A
Paramagnetic substances are weakly attracted to an external magnetic field.
Paramagnetic substances are weakly attracted to an external magnetic field.
Q25.The magnetic susceptibility of a paramagnetic substance is generallyApplication
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Correct answer: A
Paramagnetic susceptibility is small and positive.
Paramagnetic susceptibility is small and positive.
Q26.Ferromagnetic substances are generallyApplication
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Correct answer: A
Ferromagnetic materials can show strong magnetisation and strong attraction to magnetic fields.
Ferromagnetic materials can show strong magnetisation and strong attraction to magnetic fields.
Q27.Which set contains ferromagnetic substances?Application
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Correct answer: A
Iron, cobalt and nickel are standard examples of ferromagnetic substances.
Iron, cobalt and nickel are standard examples of ferromagnetic substances.
Q28.Which set is most consistent with common diamagnetic examples?Application
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Correct answer: B
Bismuth, copper and water are commonly cited diamagnetic examples.
Bismuth, copper and water are commonly cited diamagnetic examples.
Q29.Which material is commonly classified as paramagnetic?Exam Focus
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Correct answer: A
Aluminium is a common example of a paramagnetic substance.
Aluminium is a common example of a paramagnetic substance.
Q30.The strong magnetic response of ferromagnetic materials is associated withExam Focus
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Correct answer: A
Ferromagnetism is explained using regions called magnetic domains whose moments can align strongly.
Ferromagnetism is explained using regions called magnetic domains whose moments can align strongly.
Q31.Magnetisation of a material is defined asExam Focus
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Correct answer: A
Magnetisation M represents magnetic dipole moment per unit volume.
Magnetisation M represents magnetic dipole moment per unit volume.
Q32.The SI unit of magnetisation isExam Focus
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Correct answer: B
Since magnetisation is magnetic moment divided by volume, its SI unit is A/m.
Since magnetisation is magnetic moment divided by volume, its SI unit is A/m.
Q33.When a magnetic material is placed in an external magnetic field, magnetisation describesExam Focus
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Correct answer: A
Magnetisation is a macroscopic measure of the magnetic moment developed per unit volume.
Magnetisation is a macroscopic measure of the magnetic moment developed per unit volume.
Q34.A ferromagnetic substance heated above its Curie temperature generally becomesExam Focus
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Correct answer: A
Above the Curie temperature, ferromagnetic order is lost and the material behaves approximately as a paramagnet.
Above the Curie temperature, ferromagnetic order is lost and the material behaves approximately as a paramagnet.
Q35.As temperature increases, the magnetic ordering responsible for ferromagnetism is generallyExam Focus
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Correct answer: B
Thermal agitation disrupts the ordered alignment of magnetic domains.
Thermal agitation disrupts the ordered alignment of magnetic domains.
Q36.Which pairing is correct?Exam Focus
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Correct answer: B
Paramagnetic substances are weakly attracted to an applied magnetic field.
Paramagnetic substances are weakly attracted to an applied magnetic field.
Q37.Which pairing is correct?Exam Focus
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Correct answer: A
Diamagnetic susceptibility is negative; paramagnetic susceptibility is positive.
Diamagnetic susceptibility is negative; paramagnetic susceptibility is positive.
Q38.If the angle between m and B changes from 90° to 0°, the torqueExam Focus
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Correct answer: A
τ = mB sinθ, so torque falls from mB at 90° to zero at 0°.
τ = mB sinθ, so torque falls from mB at 90° to zero at 0°.
Q39.A student says, “Magnetic field lines can cross because different lines represent different field strengths.” The statement isExam Focus
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Correct answer: B
At a given point the magnetic field has a unique direction, so field lines cannot intersect.
At a given point the magnetic field has a unique direction, so field lines cannot intersect.
Q40.Which statement best matches the current CBSE 2026–27 Chapter 5 scope?Exam Focus
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Correct answer: B
The official 2026–27 curriculum specifies the listed Chapter 5 concepts and describes the dipole-field and torque treatment qualitatively.
The official 2026–27 curriculum specifies the listed Chapter 5 concepts and describes the dipole-field and torque treatment qualitatively.
Official 2026–27 SQP-Linked Extension — 41 to 50
Read this distinction carefully: The questions below are separated from the core section because they cover concepts such as relative permeability and Gauss’s law for magnetism that are not explicitly listed in the Chapter 5 syllabus wording but have appeared in official CBSE assessment material. Use the official 2026–27 Class XII SQP/MS page and the linked Physics SQP/Marking Scheme for the primary reference.
Q41.In the official 2026–27 Physics SQP-linked extension, relative permeability μr is related to permeability μ and free-space permeability μ0 bySQP Extension
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Correct answer: B
Relative permeability is defined as the ratio μ/μ0.
Relative permeability is defined as the ratio μ/μ0.
Q42.The net magnetic flux through any closed surface, according to Gauss's law for magnetism, isSQP Extension
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Correct answer: C
Gauss's law for magnetism states that the net magnetic flux through a closed surface is zero.
Gauss's law for magnetism states that the net magnetic flux through a closed surface is zero.
Q43.Gauss's law for magnetism is consistent with the fact thatSQP Extension
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Correct answer: A
The absence of isolated magnetic monopoles is consistent with zero net magnetic flux through a closed surface.
The absence of isolated magnetic monopoles is consistent with zero net magnetic flux through a closed surface.
Q44.For a material with μ = μ0, the relative permeability isSQP Extension
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Correct answer: B
μr = μ/μ0 = 1.
μr = μ/μ0 = 1.
Q45.If μ = 3μ0, the relative permeability isSQP Extension
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Correct answer: C
μr = μ/μ0 = 3.
μr = μ/μ0 = 3.
Q46.For an isotropic linear magnetic material, a commonly used relation isSQP Extension
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Correct answer: A
In the linear relation B = μ0(H + M) with M = χmH, μr = μ/μ0 = 1 + χm.
In the linear relation B = μ0(H + M) with M = χmH, μr = μ/μ0 = 1 + χm.
Q47.If the net magnetic flux through a closed surface is zero, it means that the surface hasSQP Extension
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Correct answer: B
Zero net flux does not mean the field is absent; it means the algebraic total through the closed surface is zero.
Zero net flux does not mean the field is absent; it means the algebraic total through the closed surface is zero.
Q48.Which statement correctly distinguishes a magnetic field line from an electric field line in the monopole picture?SQP Extension
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Correct answer: A
Magnetic field lines form closed loops because isolated magnetic poles are not observed.
Magnetic field lines form closed loops because isolated magnetic poles are not observed.
Q49.A material has μr = 1. If μ0 is the permeability of free space, its permeability μ isSQP Extension
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Correct answer: A
From μr = μ/μ0, μr = 1 gives μ = μ0.
From μr = μ/μ0, μr = 1 gives μ = μ0.
Q50.Why is the SQP-linked extension separated from the core section on this page?SQP Extension
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Correct answer: B
The separation keeps the page transparent: the current syllabus wording is treated as the core scope, while SQP-linked concepts are clearly identified as an extension.
The separation keeps the page transparent: the current syllabus wording is treated as the core scope, while SQP-linked concepts are clearly identified as an extension.
Rapid Revision Map
| Concept | Remember | Common Trap |
|---|---|---|
| Field lines | Outside N→S; inside S→N; closed loops; never intersect. | Do not draw magnetic field lines as open lines ending at a pole. |
| Dipole moment | For a current coil, m = NIA; SI unit A m². | Do not confuse magnetic dipole moment with magnetisation. |
| Torque | τ = mB sinθ; maximum at 90°, zero at 0° and 180°. | Torque is not maximum when m is parallel to B. |
| Materials | Dia: weak repulsion, small negative χ; Para: weak attraction, small positive χ; Ferro: strong response. | Do not reverse the signs of dia/paramagnetic susceptibility. |
| Magnetisation | Magnetic moment per unit volume; SI unit A/m. | It is not magnetic moment itself and not measured in A m². |
| Temperature | Heating disrupts magnetic ordering; ferromagnets lose ferromagnetic order above Curie temperature. | Do not say heating strengthens ferromagnetic ordering. |
| SQP extension | μr = μ/μ0; net magnetic flux through a closed surface is zero. | Zero net flux does not mean the magnetic field is zero everywhere. |
Chapter 5 Resources
- Magnetism and Matter Class 12 Physics Notes — the Chapter 5 notes/pillar page.
- Magnetism and Matter Class 12 Important Questions — board-style short and long-answer practice.
- Moving Charges and Magnetism Class 12 Physics Notes — Chapter 4 bridge for current-loop magnetic dipole ideas.
- Official CBSE Physics Curriculum 2026–27 — syllabus reference.
- Official CBSE Class XII 2026–27 SQP and Marking Scheme page — latest official assessment material.
Final MCQ Check
☐ I can distinguish axial and equatorial positions.
☐ I know when magnetic torque is zero or maximum.
☐ I can classify dia-, para- and ferromagnetic materials.
☐ I know the definition and SI unit of magnetisation.
☐ I understand the temperature effect on ferromagnetism.
☐ I can distinguish core syllabus from the SQP-linked extension.
Important: These are original practice questions, not predictions of the board paper and not official CBSE questions unless a source is explicitly identified. Always use the latest official CBSE curriculum and assessment material as the final authority.
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