Students who can Practice MCQ Questions for Class 12 with Answers to improve your score more marks in Board Exams. These Class 12 Physics MCQ Questions of Magnetism and matter with answers have been prepared as per the latest syllabus, and examination pattern suggested in class 12 by CBSE. Here, you’ll also get links to access some very valuable articles for the preparation of the upcoming CBSE Board Exam.
Students of CBSE Class 12 having Physics together of their subjects can check some important Class 12 Physics MCQ Questions of Magnetism and Matter with Answers. MCQ Questions for class 12 Physics for important part of exams for Class 12 Physics and if practiced properly can help you to get higher marks in exams.
Practice MCQ Question for Class 12 Physics chapter-wise
1. S.I. unit of flux is :
(a) Ohm
(b) Weber
(c) Tesla
(d) None
2. Which of the following has a low value in ferrites?
(a) Conductivity
(b) Permeability
(c) Magnetic susceptibility
(d) All the above
3. Ferrites may be:
(a) ant. ferromagnetic
(b) ferromagnetic
(c) ferrimagnetic
(d) None of the above
4. The magnetic lines of force inside a bar magnet:
(a) do not exist
(b) depends on area of cross-section of bar magnet
(c) are from N-pole to S-pole of the magnet
(d) are from S-pole to N-pole of the magnet
5. A magnetic dipole moment is a vector quantity directed from:
(a) S to N
(b) N to S
(c) E to W
(d) W to E
6. In a moving coil galvanometer, we use a radial magnetic field so that the galvanometer scale is :
(a) exponential
(b) linear
(c) algebraic
(d) logarithmic
7. The magnetic field of the earth can be modelled by that of a point dipole placed at the centre of the earth. The dipole axis makes an angle of 11.3° with the axis of the earth. At Mumbai, declination is nearly zero. Then,
(a) the declination varies between 11.3∘ W to 11.3∘E
(b) the least declination is 0∘
(c) the plane defined by dipole axis and the earth axis passes through Greenwich
(d) declination averaged over the earth must be always negative
8. Magnetic lines of force due to a bar magnet do not intersect because
(a) a point always has a single net magnetic field
(b) the lines have similar charges and so repel each other
(c) the lines always diverge from a single force
(d) the lines need magnetic lenses to be made to interest
9. Assertion : A paramagnetic sample display greater magnetisation (for the same magnetic field) when cooled.
Reason : The magnetisation does not depend on temperature
(a) Assertion is correct, reason is correct; reason is a correct explanation for assertion.
(b) Assertion is correct, reason is correct; reason is not a correct explanation for assertion
(c) Assertion is correct, reason is incorrect
(d) Assertion is incorrect, reason is correct
10. The magnetic susceptibility is negative for
(a) diamagnetic material only
(b) paramagnetic material only
(c) ferromagnetic material only
(d) paramagnetic and ferromagnetic materials
11. Assertion : Electromagnetic are made of soft iron.
Reason : Coercivity of soft iron is small.
(a) Assertion is correct, reason is correct; reason is a correct explanation for assertion.
(b) Assertion is correct, reason is correct; reason is not a correct explanation for assertion
(c) Assertion is correct, reason is incorrect
(d) Assertion is incorrect, reason is correct
12. The primary origin (s) of magnetism lies in
(a) atomic currents
(b) polar nature of molecules
(c) extrinsic spin of electron
(d) None of these
13. Demagnetisation of magnets can be done by
(a) rough handling
(b) heating
(c) magnetizing in the opposite direction
(d) All of the above
14. A bar magnet is cut into two equal halves by a plane parallel to the magnetic axis. Of the following physical quantities the one which remains unchanged is
(a) pole strength
(b) magnetic moment
(c) intensity of magnetisation
(d) None of these
15. When a current in a circular loop is equivalently replaced by a magnetic dipole
(a) the pole strength m of each pole is fixed
(b) the distance d between the poles is fixed
(c) the product md is fixed
(d) None of these
16. A circular loop carrying a current is replaced by an equivalent magnetic dipole. A point on the axis of the loop is in
(a) end-on position
(b) broadside-on position
(c) both
(d) None of these
17. A diamagnetic material in a magnetic field moves
(a) perpendicular to the field
(b) from stronger to the weaker parts of the field
(c) from weaker to the stronger parts of the field
(d) None of these
18. The magnetic moment of a bar magnet is thus ...A... to the magnetic moment of an equivalent solenoid that produces the same magnetic field. Here, A refers to
(a) unequal
(b) different
(c) equal
(d) same
19. The lines of force due to earth’s horizontal magnetic field are
(a) parallel and straight
(b) concentric circles
(c) elliptical
(d) curved lines
20. At the magnetic north pole of the earth, the value of the horizontal component of earth’s magnetic field and angle of dip are respectively
(a) zero, maximum
(b) maximum, minimum
(c) maximum, maximum
(d) minimum, minimum
21. Which of the following is responsible for the earth’s magnetic field?
(a) Convective currents in earth’s core
(b) Diversive current in earth’s core
(c) Rotational motion of earth
(d) Translational motion of earth
22. One can define ...A... of a place as the vertical plane which passes through the imaginary line joining the magnetic North and the South–poles. Here, A refers to
(a) geographic meridian
(b) magnetic meridian
(c) magnetic declination
(d) magnetic inclination
23. Metals getting magnetised by orientation of atomic magnetic moments in external magnetic field are called
(a) diamagnetic
(b) paramagnetic
(c) ferromagnetic
(d) antimagnetic
24. The materials suitable for making electromagnets should have
(a) high retentivity and low coercivity
(b) low retentivity and low coercivity
(c) high retentivity and high coercivity
(d) low permeability and high retentivity.
25. The given figure represents a material which is
(a) paramagnetic
(b) diamagnetic
(c) ferromagnetic
(d) none of these