Class 12 Physics MCQ Chapter 5 Magnetism and Matter
Strengthen your Physics preparation with our Class 12 Physics MCQ Chapter 5 Magnetism and Matter English Medium question bank, specially developed for AHSEC Higher Secondary students. This article includes a wide range of important multiple-choice questions (MCQs) with answers to help you revise the chapter effectively and perform better in examinations.
The chapter Magnetism and Matter explores the properties of magnets and their behavior in different situations. Students will learn about magnetic dipoles, magnetic field lines, bar magnets, Earth’s magnetism, magnetic elements, magnetic materials, and the classification of substances into diamagnetic, paramagnetic, and ferromagnetic categories. Understanding these concepts is essential for building a strong foundation in magnetism and electromagnetism.
All MCQs are prepared according to the latest AHSEC syllabus and examination guidelines. These objective questions are ideal for self-practice, quick revision, and identifying important topics that are frequently asked in board examinations. Regular practice can improve conceptual understanding, enhance accuracy, and boost confidence before exams.
Whether you are preparing for unit tests, model examinations, or the AHSEC Higher Secondary Final Examination, these Chapter 5 MCQ solutions will serve as a valuable resource for achieving excellent results in Physics.
Part: I
Magnetism and Matter
VSA & MCQ
I. Very Short Answer Questions
Q. What is magnetism?
Ans: Magnetism is a property of matter due to which it produces a magnetic field and experiences magnetic force.
Q. What is a magnetic dipole?
Ans: A magnetic dipole is a pair of equal and opposite magnetic poles separated by a small distance.
Q. What is magnetic dipole moment?
Ans: Magnetic dipole moment is m = pole strength × separation.
Q. What is the SI unit of magnetic dipole moment?
Ans: A·m².
Q. What is a bar magnet?
Ans: A permanent magnet with two poles, north and south.
Q. What is a magnetic field line?
Ans: A closed curve representing magnetic field direction.
Q. What is Gauss’s law for magnetism?
Ans: Net magnetic flux through a closed surface is zero.
Q. What is magnetic field inside a bar magnet?
Ans: From south pole to north pole.
Q. What is magnetic field outside a magnet?
Ans: From north pole to south pole.
Q. What is torque on a magnetic dipole?
Ans: τ = mB sinθ.
Q. What is potential energy of dipole?
Ans: U = −mB cosθ.
Q. What is magnetic susceptibility?
Ans: χ = M / H.
Q. What is magnetization?
Ans: Magnetic moment per unit volume.
Q. What is magnetic intensity?
Ans: H = B / μ₀ − M.
Q. What is permeability?
Ans: μ = B / H.
Q. What is relative permeability?
Ans: μr = μ / μ₀.
Q. What are diamagnetic materials?
Ans: Materials weakly repelled by magnetic field.
Q. Give example of diamagnetic material.
Ans: Bismuth.
Q. What are paramagnetic materials?
Ans: Materials weakly attracted by magnetic field.
Q. Give example of paramagnetic material.
Ans: Aluminium.
Q. What are ferromagnetic materials?
Ans: Materials strongly attracted by magnetic field.
Q. Give example of ferromagnetic material.
Ans: Iron.
Q. What is Curie temperature?
Ans: Temperature above which ferromagnetic becomes paramagnetic.
Q. What is retentivity?
Ans: Ability to retain magnetization.
Q. What is coercivity?
Ans: Ability to resist demagnetization.
Q. What is hysteresis?
Ans: Lag between magnetization and magnetic field.
Q. What is soft magnetic material?
Ans: Material with low coercivity.
Q. What is hard magnetic material?
Ans: Material with high coercivity.
Q. What is earth’s magnetic field?
Ans: Magnetic field surrounding Earth.
Q. What is magnetic declination?
Ans: Angle between geographic and magnetic meridian.
II. Multiple Choice Questions
Q. Magnetic dipole moment unit is:
(a) A·m²
(b) Tesla
(c) Coulomb
(d) Joule
Ans: (a)
Q. Magnetic field lines are:
(a) Open
(b) Closed
(c) Straight
(d) Parallel
Ans: (b)
Q. Diamagnetic materials are:
(a) Strongly attracted
(b) Weakly attracted
(c) Weakly repelled
(d) Strongly repelled
Ans: (c)
Q. Paramagnetic materials are:
(a) Repelled
(b) Weakly attracted
(c) Strongly attracted
(d) Neutral
Ans: (b)
Q. Ferromagnetic materials are:
(a) Weak
(b) Strongly attracted
(c) Repelled
(d) Neutral
Ans: (b)
Q. Curie temperature is for:
(a) Diamagnetic
(b) Paramagnetic
(c) Ferromagnetic
(d) All
Ans: (c)
Q. Retentivity measures:
(a) Resistance
(b) Magnetization retention
(c) Current
(d) Voltage
Ans: (b)
Q. Coercivity measures:
(a) Resistance to demagnetization
(b) Current
(c) Field
(d) Charge
Ans: (a)
Q. Earth behaves like:
(a) Electric dipole
(b) Magnetic dipole
(c) Neutral body
(d) Conductor
Ans: (b)
Q. Hysteresis loop shows:
(a) Charge
(b) Current
(c) Magnetization
(d) Resistance
Ans: (c)
Q. Assertion: Magnetic field lines are closed. Reason: Magnetic monopoles do not exist.
(a) Both true, reason correct
(b) Both true, reason incorrect
(c) Assertion true, reason false
(d) Both false
Ans: (a)
Q. Assertion: Diamagnetic materials are repelled. Reason: Induced field opposite to applied field.
(a) Both true, reason correct
(b) Both true, reason incorrect
(c) Assertion true, reason false
(d) Both false
Ans: (a)
Q. Assertion: Ferromagnetic materials have high susceptibility. Reason: Strong domain alignment.
(a) Both true, reason correct
(b) Both true, reason incorrect
(c) Assertion true, reason false
(d) Both false
Ans: (a)
Q. Assertion: Curie temperature destroys ferromagnetism. Reason: Thermal agitation increases.
(a) Both true, reason correct
(b) Both true, reason incorrect
(c) Assertion true, reason false
(d) Both false
Ans: (a)
Q. Assertion: Soft magnets have low coercivity. Reason: Easy magnetization and demagnetization.
(a) Both true, reason correct
(b) Both true, reason incorrect
(c) Assertion true, reason false
(d) Both false
Ans: (a)
Q. Assertion: Earth is a magnet. Reason: It has magnetic poles.
(a) Both true, reason correct
(b) Both true, reason incorrect
(c) Assertion true, reason false
(d) Both false
Ans: (a)
Q. Assertion: Hysteresis causes energy loss. Reason: Area of loop represents loss.
(a) Both true, reason correct
(b) Both true, reason incorrect
(c) Assertion true, reason false
(d) Both false
Ans: (a).
