Magnetism and Matter MCQ Questions for Class 12 Physics Chapter 5 with Answers

Find here the NCERT chapter-wise Multiple Choice Questions from Class 12 Physics book Chapter 5 Magnetism and Matter with Answers Pdf free download. This may assist you to understand and check your knowledge about the chapters. Students also can take a free test of the Multiple Choice Questions of Magnetism and Matter. Each question has four options followed by the right answer. These MCQ Questions are selected supported by the newest exam pattern as announced by CBSE.

NCERT MCQ Chapters for Class 12 Physics

Q1. The angle of dip at a certain place where the horizontal and vertical components of the earth’s magnetic field are equal is

(i) 30°
(ii) 75°
(iii) 60°
(iv) 45°

(iv) 45°

Q2. Tangent law is applicable only when:

(i) two uniform and mutually perpendicular magnetic fields exist
(ii) two magnetic fields exist
(iii) horizontal component of earth’s magnetic field is present
(iv) uniform magnetic field are used

(i) two uniform and mutually perpendicular magnetic fields exist

Q3. S is the surface of a lump of magnetic material.

(i) Lines of B are not necessarily continuous across S.
(ii) Some lines of B must be discontinuous across S.
(iii) Lines of H are necessarily continuous across S.
(iv) Lines of H cannot all be continuous across S.

(iv) Lines of H cannot all be continuous across S.

Q4. The magnetic susceptibility is negative for:

(i) diamagnetic material only
(ii) paramagnetic material only
(iii) ferromagnetic material only
(iv) paramagnetic and ferromagnetic materials

(i) diamagnetic material only

Q5. Which of the following is a natural magnet?

(i) Magnetic needle
(ii) Bar magnet
(iii) Magnetite
(iv) Horseshoe magnet

(iii) Magnetite

Q6. Let the magnetic field on earth be modelled by that of a point magnetic dipole at the centre of earth. The angle of dip at a point on the geographical equator is

(i) always zero
(ii) positive, negative or zero
(iii) unbounded
(iv) always negative

(ii) positive, negative or zero

Q7. Which of the following has a low value in ferrites?

(i) Conductivity
(ii) Permeability
(iii) Magnetic susceptibility
(iv) All the above

(i) Conductivity

Q8. In a permanent magnet at room temperature

(i) magnetic moment of each molecule is zero.
(ii) the individual molecules have non-zero magnetic moment which are all perfectly aligned.
(iii) domains are partially aligned.
(iv) domains are all perfectly aligned.

(iii) domains are partially aligned.

Q9. If the magnetising field on a ferromagnetic material is increased, its permeability.

(i) is decreased
(ii) is increased
(iii) is unaffected
(iv) may be increased or decreased.

(i) is decreased

Q10. Which of the following is not a basic property of magnets.

(i) Magnet exists as a monopole
(ii) Attractive property
(iii) Directive property
(iv) Like poles repel and unlike poles attract

(i) Magnet exists as a monopole

Q11. Which of the following independent quantities is not used to specify the earth’s magnetic field?

(i) Magnetic declination (θ).
(ii) Magnetic dip (δ).
(iii) Horizontal component of earth’s field (BH).
(iv) Vertical component of earth’s field (BV).

(iv) Vertical component of earth’s field (BV).

Q12. S.I. unit of flux is :

(i) Ohm
(ii) Weber
(iii) Tesla
(iv) None

(ii) Weber

Q13. The primary origin(s) of magnetism lies in

(i) Pauli exclusion principle.
(ii) polar nature of molecules.
(iii) intrinsic spin of electron.
(iv) None of these.

(ii) polar nature of molecules.

Q14. When does a magnetic dipole possess maximum potential energy inside a magnetic field?

(i) Magnetic moment and magnetic field are antiparallel
(ii) Magnetic moment and magnetic field are parallel
(iii) The magnetic moment is zero
(iv) The magnetic field is zero

(i) Magnetic moment and magnetic field are antiparallel

Q15. What is the torque exerted by a bar magnet on itself due to its field?

(i) Maximum
(ii) Zero
(iii) Minimum
(iv) Depends on the direction of the magnetic field

(ii) Zero

Q16. Which of the following is responsible for the earth’s magnetic field?

(а) Convective currents in earth’s core
(б) Diversive current in earth’s core.
(iii) Rotational motion of earth.
(iv) Translational motion of earth.

(а) Convective currents in earth’s core

Q17. Ferrites may be:

(i) ant. ferromagnetic
(ii) ferromagnetic
(iii) ferrimagnetic
(iv) None of the above

(ii) ferromagnetic

Q18. Let the magnetic field on earth be modelled by that of a point magnetic dipole at the centre of earth. The angle of dip at a point on the geographical equator

(i) is always zero.
(ii) can be zero at specific points.
(iii) cannot be positive or negative.
(iv) is not bounded.

(ii) can be zero at specific points.

Q19. How many quantities are required to specify the magnetic field of the earth?

(i) 1
(ii) 2
(iii) 3
(iv) 4

(iii) 3

Q20. Which among the following is denoted by δ?

(i) Horizontal component
(ii) Magnetic meridian
(iii) Magnetic declination
(iv) Magnetic inclination

(iv) Magnetic inclination

Q21. The strength of the earth’s magnetic field is

(i) constant everywhere.
(ii) zero everywhere.
(iii) having very high value.
(iv) vary from place to place on the earths surface.

(iv) vary from place to place on the earths surface.

Q22. The magnetic lines of force inside a bar magnet:

(i) do not exist
(ii) depends on area of cross-section of bar magnet
(iii) are from N-pole to S-pole of the magnet
(iv) are from S-pole to N-pole of the magnet.

(iv) are from S-pole to N-pole of the magnet.

Q23. A magnetic needle is kept in a non-uniform magnetic field. It experiences

(i) a torque but not a force.
(ii) neither a force nor a torque.
(iii) a force and a torque.
(iv) a force but not a torque.

(iii) a force and a torque.

Q24. Identify the expression for magnetic induction from the following.

(i) B = μo(H+I)
(ii) B = μo(H×I)
(iii) B = μo(H-I)
(iv) B = μo(HI)

(i) B = μo(H+I)

Q25. Which among the following has a relative permeability much larger than 1?

(i) Diamagnetic materials
(ii) Ferromagnetic materials
(iii) Paramagnetic materials
(iv) Ferrimagnetic materials

(ii) Ferromagnetic materials

Q26. Which of the following property shows the property of ferromagnetic substances?

(i) The ferromagnetic property depends on tem-perature. ‘
(ii) The ferromagnetic property does not depend on temperature.
(iii) At high enough temperature ferromagnet becomes a diamagnet.
(iv) At low temperature ferromagnet becomes a paramagnet.

(i) The ferromagnetic property depends on tem-perature.

Q27. A magnetic dipole moment is a vector quantity directed from:

(i) S to N
(ii) N to S
(iii) E to W
(iv) W to E

(i) S to N

Q28. Curie temperature is the temperature above which

(i) a ferromagnetic material becomes paramagnetic.
(ii) a ferromagnetic material becomes diamagnetic.
(iii) a paramagnetic material becomes diamagnetic.
(iv) a paramagnetic material becomes ferromagnetic.

(i) a ferromagnetic material becomes paramagnetic.

Q29. Calculate the surface integral of a magnetic field over a surface.

(i) Maximum
(ii) Minimum
(iii) Zero
(iv) Equal to its magnetic flux through that surface

(iv) Equal to its magnetic flux through that surface

Q30. Magnetic moment for solenoid and corresponding bar magnet is

(i) equal for both
(ii) more for solenoid
(iii) more for bar magnet
(iv) none of these

(i) equal for both

Q31. On quadrupling the moment of inertia of a magnet, its frequency of oscillation will become:

(i) half
(ii) double
(iii) four times
(iv) one-fourth

(i) half

Q32. Lines of force, due to earth’s horizontal magnetic field, are

(i) elliptical
(ii) curved lines
(iii) concentric circles
(iv) parallel and straight

(iv) parallel and straight

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