# Magnetism and Matter MCQ Questions Class 12 Physics Chapter 5

Magnetism and Matter MCQ Questions Class 12 Physics Chapter 5

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

## Magnetism and Matter MCQ Questions Class 12 Physics Chapter 5

Magnetism and Matter Multiple Choice Questions with Answers Class 12 Physics Chapter 5 PDF is available.

1) The earth behaves as a ______ with the magnetic field pointing approximately from the geographic south to the north.

a) Electromagnet

b) Magnet

c) Both a and b

d) None

Ans: b) magnet

2) When a bar magnet is freely suspended it points in the _____

a) South -north direction

b) East-west direction

c) North-south direction

d) None

Ans: c) north- south direction

3) The tip which points to the geographic north is called as

a) South pole

b) North pole

c) East pole

d) West pole

Ans: b) north pole

4) The tip which points to the geographic south is called as

a) North pole

b) South pole

c) Both a and b

d) None

Ans: b) South pole

5) There is a _____ when north poles of two magnets are brought closed together.

a) Attractive force

b) Repulsive force

c) Both a and b

d) None

Ans: b) repulsive force

6) There is a _____ when north pole of one magnet is brought near to the south pole of the another magnet.

a) Repulsive force

b) Attractive force

c) Both a and b

d) None

Ans: b) attractive force

7) We ______ isolate the south and north pole of a magnet.

a) Can

b) Cannot

c) May

d) None

Ans: b) cannot

8) If a bar magnet is broken into two halves we get the two similar bar magnets with somewhat

a) Same properties

b) Stronger properties

c) Weaker properties

d) None

Ans: c) weaker properties

9) The magnetic field lines of a magnet forms

a) Continuous open loops

b) Continuous closed loops

c) Both a and b

d) None

Ans: b) continuous closed loops

10) The magnetic field lines starts from ____ ____ and ends on the _____.

a) Negative charge, positive charge

b) Positive charge, negative charge

c) Positive charge, escape to infinity

d) Both b and c

Ans: d) both b and c

11) The tangent at the field line at a given point represent the direction of the

a) Magnetic field at that point

b) Net magnetic field at that point

c) Net electric filed at that point

d) None

Ans: b) net magnetic field at that point

12) The larger the number of field lines crossing per unit area, _____ is the magnitude of the magnetic field.

a) Weaker

b) Stronger

c) Both a and b

d) None

Ans: b) stronger

13) The magnetic field lines

a) Intersect each other

b) Never intersect each other

c) Both a and b

d) None

Ans: b) never intersect each other

14) Magnetic monopoles

a) Exist

b) Do not exist

c) Both a and b

d) None

Ans: b) do not exist

15) The net magnetic flux through any closed surface is

a) Unity

b) Infinity

c) Zero

d) None

Ans: c) zero

16) The net magnetic flux through any closed surface is zero, this is the

a) Ampere’s law

b) Gauss’s law

c) Coulomb’s law

d) None

Ans: b) Gauss’s law

17) The pole near the geographic north pole of the earth is called as

a) South magnetic pole

b) North magnetic pole

c) West magnetic pole

d) East magnetic pole

Ans: b) north magnetic pole

18) The pole near the geographic south of the earth is called as

a) South magnetic pole

b) North magnetic pole

c) West magnetic pole

d) None

Ans: a) south magnetic pole

19) The vertical plane containing the longitudinal circle and axis of the rotation of earth is called as

a) Geographic meridian

b) Magnetic meridian

c) Both a and b

d) None

Ans: a) geographic meridian

20) The vertical plane which passes through the imaginary line joining the magnetic north and south poles is called as

a) Geographic meridian

b) Magnetic meridian

c) Both a and b

d) None

Ans: b) magnetic meridian

21) The angle made by magnetic meridian at point with the geographic meridian is called as

a) Magnetic declination

b) Simply declination

c) Both a and b

d) None

Ans: c) both a and b

22) The declination is _____ at higher latitudes and _____ near the equator.

a) Smaller, greater

b) Greater, smaller

c) Constant, constant

d) None

Ans: b) greater, smaller

23) The net magnetic moment per unit volume is called as

a) Magnetism

b) Magnetisation

c) Magnetic flux

d) None

Ans: b) magnetisation

24) The magnetisation is the

a) Scalar quantity

b) Vector quantity

c) Tensor quantity

d) None

Ans: b) Vector quantity

25) The dimensions of magnetisation are

a) [L A]

b) [L-1 A]

c) [L-2 A]

d) None

Ans: b) [L-1 A]

26) The SI unit of magnetisation is

a) Am

b) A/m

c) A/m3

d) None

Ans: b) A/m

27) The measure of how a magnetic material responds to an external field is called as

a) Magnetisation

b) Magnetic flux

c) Magnetic moment

d) Magnetic susceptibility

Ans: d) magnetic susceptibility

28) The magnetic susceptibility is the

a) Dimensional quantity

b) Dimensionless quantity

c) Both a and b

d) None

Ans: b) dimensionless quantity

29) The materials with magnetic susceptibility positive and small are called as

a) Paramagnetic

b) Diamagnetic

c) Ferromagnetic

d) None

Ans: a) paramagnetic

30) The materials with magnetic susceptibility negative and small are called as

a) Paramagnetic

b) Diamagnetic

c) Ferromagnetic

d) None

Ans: b) diamagnetic

31) Paramagnetic materials are the materials having magnetic susceptibility as

a) Small, negative

b) Large, positive

c) Small, positive

d) None

Ans: c) small, positive

32) Diamagnetic materials are the materials having magnetic susceptibility as

a) Small, negative

b) Small, positive

c) Large, negative

d) None

Ans: a) small, negative

33) Diamagnetic substances are those which are having tendency to move from ____ to the _____ part of the external magnetic field.

a) Weaker , stronger

b) Stronger, weaker

c) Both a and b

d) None

Ans: b) stronger, weaker

34) The substances which are having tendency to move from stronger part to weaker part of the external magnetic field are called as

a) Paramagnetic materials

b) Diamagnetic materials

c) Ferromagnetic material

d) None

Ans: b) diamagnetic materials

35) Magnets _____ the diamagnetic materials

a) Attracts

b) Repels

c) Both a and b

d) None

Ans: b) repels

36) In case of diamagnetic materials, the resultant magnetic moment in an atom is

a) Uniform

b) Non uniform

c) Infinity

d) Zero

Ans: d) zero

37) Which of the following are the diamagnetic materials

a) Bismuth

b) Copper

d) All

Ans: d) all

38) The most exotic diamagnetic materials are

a) Semiconductors

b) Superconductors

c) Conductors

d) Insulators

Ans: b) superconductors

39) Superconductors are the materials which exhibits

a) Perfect conductivity

b) Perfect diamagnetism

c) Both a and b

d) None

Ans: c) both a and b

40) The magnetic susceptibility for superconducting materials is

a) 1

b) -1

c) 0

d) Infinity

Ans: b) -1

41) The phenomenon of perfect diamagnetism in superconductors is called as

a) Superconducting effect

b) Meissner effect

c) Magnetic effect

d) None

Ans: b) Meissner effect

42) The substances which get weakly magnetised when placed in an external magnetic field are called as

a) Paramagnetic materials

b) Diamagnetic materials

c) Superconducting materials

d) None

Ans: a) paramagnetic materials

43) Paramagnetic materials are those which are _____ magnetised when placed in an external magnetic field.

a) Strongly

b) Weakly

c) Uniformly

d) None

Ans: b) weakly

44) The materials which are get ____ attracted by the magnet are called as paramagnetic materials.

a) Weakly

b) Strongly

c) Uniformly

d) None

Ans: a) weakly

45) The magnetic substances which moves from weak magnetic field to strong magnetic field are called as

a) Diamagnetic materials

b) Paramagnetic materials

c) Both a and b

d) None

Ans: b) paramagnetic materials

46) Which of the following are paramagnetic materials

a) Aluminium

b) Sodium

c) Calcium

d) All

Ans: d) all

47) The magnetisation is _____ promotional to the absolute temperature in case of paramagnetic materials.

a) Directly

b) Inversely

c) Both a and b

d) None

Ans: b) inversely

48) In case of paramagnetic materials, the magnetisation is inversely proportional to

a) Magnetic field

b) Electric field

c) Absolute temperature

d) None

Ans: c) absolute temperature

49) The materials in which magnetisation is inversely proportional to absolute temperature are called as

a) Paramagnetic materials

b) Diamagnetic materials

c) Ferromagnetic material

d) Both a and b

Ans: a) paramagnetic materials

50) The magnetic susceptibility of a paramagnetic materials is inversely proportional to absolute temperature is called as

a) Meissner effect

b) Gauss’s law

c) Ampere’s law

d) Curie’s law

Ans: d) Curie’s law

51) The substances which are strongly magnetised when placed in an external magnetic field are called as

a) Paramagnetic materials

b) Diamagnetic materials

c) Ferromagnetic material

d) None

Ans: c) ferromagnetic material

52) Ferromagnetic material are those which are _____ magnetised when placed in an external magnetic field

a) Weakly

b) Strongly

c) Uniformly

d) None

Ans: b) strongly

53) The ferromagnetic material have strong tendency to move from a region of ____ magnetic field to _____ magnetic field.

a) Strong, weak

b) Weak, strong

c) Both a and b

d) None

Ans: b) weak, strong

54) The materials which have strong tendency to move from a region of weak magnetic field to strong magnetic field are called as

a) Diamagnetic materials

b) Paramagnetic materials

c) Ferromagnetic material

d) None

Ans: c) ferromagnetic material

55) The materials which get strongly attracted by the magnet are called as

a) Paramagnetic materials

b) Diamagnetic materials

c) Ferromagnetic material

d) None

Ans: c) ferromagnetic material

56) Ferromagnetic material are those which get ___ attracted by the magnet.

a) Weakly

b) Strongly

c) Uniformly

d) None

Ans: b) strongly

57) The ferromagnetic material in which magnetisation persists are called as

a) Soft ferromagnets

b) Hard ferromagnets

c) Both a and b

d) None

Ans: b) hard ferromagnets

58) Alnico is the

a) Hard ferromagnets

b) Soft ferromagnets

c) Ferromagnets

d) Paramagnet

Ans: a) hard ferromagnets

59) The ferromagnetic material which loses magnetisation after removal of the external magnetic field are called as

a) Soft ferromagnets

b) Hard ferromagnets

c) Paramagnetic materials

d) Diamagnetic materials

Ans: a) soft ferromagnets

60) Soft iron is the

a) Hard ferromagnets

b) Soft ferromagnets

c) Paramagnet

d) Diamagnets

Ans: b) soft ferromagnets

61) The temperature at which ferromagnetic material is converted into paramagnetic are called as

a) Ferries temperature

b) Neil temperature

c) Curie temperature

d) None

Ans: c) curie temperature

62) The value of B at H= 0 is called as

a) Retentivity

b) Remanence

c) Both a and b

d) None

Ans: c) both a and b

63) The word hysterisismeans

a) Lagging behind

c) Both a and b

d) Remains in same state

Ans: a) lagging behind

64) The substances which retain their ferromagnetic property for a long period of time are called as

a) Temporary magnets

b) Soft magnets

c) Hard magnets

d) Permanent magnets

Ans: d) permanent magnet

65) The relative permeability and magnetic susceptibility are related as

a) Relative permeability = 1+ magnetic susceptibility

b) Relative permeability = 1- magnetic susceptibility

c) Magnetic susceptibility = relative permeability – 1

d) Both a and c

Ans: d) both a and c

66) Magnetic flux is the

a) Scalar quantity

b) Vector quantity

c) Tensor quantity

d) None

Ans: a) scalar quantity

67) Magnetic susceptibility is the

a) Scalar

b) Vector

c) Tensor

d) None

Ans: a) scalar

68) Relative magnetic permeability and magnetic permeability are

a) Scalar

b) Vector

c) Tensor

d) Both a and b

Ans: a) scalar

69) The magnetic susceptibility for diamagnetic materials is about

a) +10-5

b) -10-5

c) -10-6

d) +10-6

Ans: b) -10-5

70) For paramagnetic materials the magnetic susceptibility is

a) +10-5

b) -10-5

c) -10-6

d) +105

Ans: a) +10-5

71) For superconductors nor perfect diamagnetic

a) Magnetic susceptibility = -1

b) Relative magnetic permeability = 0

c) Magnetic permeability = 0

d) All

Ans: d) all

72) The magnetic permeability is measured in

a) N/A

b) N/A2

c) NA2

d) NA

Ans: b) N/A2

Updated: April 12, 2023 — 10:29 am