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Chapter No. 8  [Test No.1]
2nd Year
Multiple Choice Questions

Book Name :  PHYSICS
Chapter No. 8 (Test No.1)
Total MCQ from Text Book :  122
Book Version  :

Published By : Punjab Text Book Board Lahore
Approved By : Govt of the Punjab and Federal Ministry for Education
Test Type : MCQ’s
Exam conduct By : Inter Boards of Sindh, KPK, Balochistan, AJK, Gilgit Baltistan, Punjab & Federal
Class / Grade  : 12 ( F.Sc. Intermediate)
Total Marks : 122
Total Time :   122 minutes



1 / 122

If an object moves with a velocity of light, then the apparent length of the object along the direction of motion becomes

2 / 122

In an expression for time dilation, the quantity √1-v2/c2is always

3 / 122

When a platinum wire is heated, at 1600°ree;C it becomes

4 / 122

The emission of electorns from a metal surface when exposed to light of suitable frequency is called

5 / 122

An human eye can detect the electormegnetic radiations of the type

6 / 122

In photoelectric effect, if intensity of incident radiation is increased, then there is increase in

7 / 122

The mass m of a body moving at 0.8 C becomes

8 / 122

For an electron or positron, the rest-mass energy is equal to

9 / 122

The theory of relativity which deals with non-inertial frame of reference is called

10 / 122

A black body is that which aborbs

11 / 122

According to special theory of relativity, all laws of physics are same in all

12 / 122

According to special theory of relativity, time is

13 / 122

The phenomenon which proves Einstein's relation (E = mc2) is

14 / 122

The rest mass of a photon is

15 / 122

When the temprature of the body is increased, the radiation becomes richer in

16 / 122

If speed of light were infinity, then moving mass m becomes

17 / 122

The discrete nature of radiation was introduced by

18 / 122

In a photocell, sodium and potassium emit electrons for

19 / 122

A device based on photoelectric effect is called

20 / 122

The minimum energy required by a photon to create a electron-positron pair is

21 / 122

The length contraction happens only

22 / 122

Absolute motion of a body

23 / 122

The value of Stefen's constant is

24 / 122

The classical physics is based upon the laws of

25 / 122

The energy of a photon is given by

26 / 122

A beam of red light and a beam of blue light have exactly the same energy. Which beam contains the greater number of photons?

27 / 122

The velocity at which the relativistic length of a body reduces to half of its original length is

28 / 122

A particle with rest mass 'm°ree;' and relativistic mass 'm' has kinetic energy equal to

29 / 122

A coordinate system relative to which measurement are taken is known as

30 / 122

Assuming you radiate as does a black body at a temperature about 17°ree;C, the wavelength of the emitted radiation is

31 / 122

A.H. Compton studied the X-rays by loosely bound electrons from a graphite target in

32 / 122

If we are strictly speaking, then earth is

33 / 122

The process in which energy is converted into meter is called

34 / 122

According to Max Plank, energy is released or absorbed in discrete packets called

35 / 122

The branch of physics which deals with the behaviour of microscopic particles moving with speed of light is called

36 / 122

An intertial frame of reference is that for which

37 / 122

The photoelectric effect can be explained on the basis of

38 / 122

The earth's orbital speed is only

39 / 122

When a very high energy photon interact with a matter, then the following phenomenon taken place

40 / 122

The special theory of relativity is based

41 / 122

A non-inertial frame of reference is that which

42 / 122

Absorption power of perfect black body is

43 / 122

The pair production equation can be written as

44 / 122

In annihilation of matter, positron and electron pair disappears into two

45 / 122

The momentum of a photon frequency f is

46 / 122

In a photocell, certainmetals emit electrons for

47 / 122

A frameof reference in which law of inertia is valid is known as

48 / 122

If the temperature of a black body is doubled, the total radiation from the body becomes

49 / 122

Due to the relative motion of observer and frame of reference, time

50 / 122

In photoelectric effect, light exhibits

51 / 122

The photoelectric effect can be explained by

52 / 122

A positron is a antiparticle of

53 / 122

The part of theory of relativity which deals with inertial or non-accelerating frames of reference is known as

54 / 122

The angle of scattering for which the Compton shift is maximum is

55 / 122

Black body energy distribution curves are the graphs between

56 / 122

Wien's theory explains energy distributon in black body for

57 / 122

Pair production confirms the

58 / 122

When a platinum wire is heated, it appears cherry red at about

59 / 122

Pair production can take place by using

60 / 122

For Pair production minimum energy of photon must be

61 / 122

In the process of annihilation of matter, the two photons produced move in opposite directino to conserve

62 / 122

A high temperature, a body generally emits radiations of

63 / 122

The speed of light in free space is

64 / 122

The pair production and annihilation of matter are

65 / 122

The nature of radiation emitted by a body depends upon

66 / 122

The special theory of relativity is applicable to the objects moving with

67 / 122

The number of photoelectrons emitted (or photoelectric current) is directly proportional to the

68 / 122

When a platinum wire is heated, it appears white at about

69 / 122

In the wien's displacement law i.e. λm x T = constant, the value of constant is

70 / 122

The momentum of a photon is

71 / 122

The numerical value of Compton wavelength h/m°ree;c is equal to

72 / 122

A frame of reference which remains at rest or moves with uniform velocity is called

73 / 122

There is a certain frequency below which no electrons are emitted from the metal surface, this frequency is known as:

74 / 122

The mass of an object will be doulbed at speed

75 / 122

At what angle, the Compton shift '&inc;λ' equals the Compton wavelength?

76 / 122

A photon is considered to have

77 / 122

Black bodies are formed of

78 / 122

The value of Plank's constant h is given by

79 / 122

All motions are

80 / 122

Einstein got the Nobel Prize in physics for his explanation of photoelectric effect in

81 / 122

The maximum energy of the photoelectrons can be determined by making the

82 / 122

The Einstein-energy mass relation can be expressed as

83 / 122

In Compton shift, the factor h/m°ree;c is known as

84 / 122

Photocell is a device which converts

85 / 122

The theory of relativity was proposed by

86 / 122

In a photcell, cesium coated oxidized silver emits electrons for

87 / 122

Positron was discovered by Carl Anderson in

88 / 122

Special theory of relativity was given in

89 / 122

Photoelectric effect was discovered by

90 / 122

A particle and its antiparticle, together at one place

91 / 122

Max Plank suggested that energy is released or absorbed in discrete packets in

92 / 122

Photo electric effect is the converse process of

93 / 122

Compton effect makes use of law of conservation of

94 / 122

The dimensions of Plank's constant h are same as that of

95 / 122

The name of photon for a quantum of light energy was first introduced by

96 / 122

The length of an object or distance between two points measured by an observer who is relatively at rest is called

97 / 122

Which photon, red, green, or blue carries the most energy?

98 / 122

The speed of photon as compared with the speed of light is always

99 / 122

In photoelectric effect, emitted electrons are called

100 / 122

Phenomena such as black body radiation , photoelectric effect, the emission of sharp spectral lines by atoms in a gas discharge tube were explained by

101 / 122

The stopping potential (V°ree;) in photoelectric effect depends on the

102 / 122

Energy of asingle quanta of elctromagnetic radiation is given the name

103 / 122

Radiations are always emitted or absorbed in the form of packets of energy. This is the statement of

104 / 122

When a platinum wire is heated, it appears orange at about

105 / 122

If the speed of light becomes infinite, then the mass of electron moving with velocity 3 x 108 m/s becomes [m0 it the rest mass of electron]

106 / 122

he photoelectric effect was explained by

107 / 122

Einstein s photo electric equation is given by

108 / 122

The maximum energy of the photoelectrons is given by the equation

109 / 122

0.1 kg mass will be equivalent to the energy

110 / 122

The process of pair production takes place if the energy of photon is at least

111 / 122

When the K.E.max of photoelectron is zero, the frequency of incident photon is______that of threshold frequency

112 / 122

In Compton effect, it was considered that X-rays consist of

113 / 122

The anti matter theory was proposed by

114 / 122

In Compton effect, the wavelength of the scattered photon as compard to the wavelength of incident X-rays is

115 / 122

At high temperature, the proprtion of shorter wavelength radiation

116 / 122

Modern physics mainly based upon

117 / 122

The relativistic change in mass, length and time in daily life are not observed because

118 / 122

Which of the following radiations has photons of maximum energy

119 / 122

If a material object moves with speed of light, its mass becomes

120 / 122

The maximum kinetic energy of emitted photoelectrons depends upon

121 / 122

An expression for Compton shift &inc;&lambda for angle θ is given as

122 / 122

The rest mass energy of an electron is

Your score is

The average score is 38%


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