Physics MCQs 2nd Year Chapter No.8 DAWN OF MODERN PHYSICS Test No.2, FSc, Grade 12, Second Year Multiple Choice Questions, Medical College ( MDCAT ) , ECAT & University Admission Entry Test Exams Online Preparation, Chapter Wise Questions Answers Quiz Notes in Pdf Download, All Old Board Papers included, All Queries reply within 24 Hours. Click here to Contact us for any Query/Question regarding Exams.

Chapter No. 8  [Test No.2]
2nd Year
Multiple Choice Questions
Note : All MCQ’s selected in this test are from OLD F.Sc. board , UHS and PMC(Pakistan Medical Commission) Islamabad 5-Years Papers.

Book Name :  PHYSICS
Chapter No. 8 (Test No.2)
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

Compton effect proves (SGD 2016 GROUP I)

2 / 122

The value of ℏ in Heisenberg uncertainty Principle is (Sgd 2015 Group I)

3 / 122

The value of Stefen's constant is (FSD 2016)

4 / 122

Energy of black body radiation depends upon (RWP 2016)

5 / 122

According to Heisenberg's first uncertainty principle, the product of momentum and position of a particle is approximately equal to

6 / 122

An electron, accelerated by P.D V has de-Broglie wavelength λ which of the following will be the de-Broglie wavelength of electron if electron is accelerated by P.D 4V?

7 / 122

Inertial frame is a frame in which (D.G. Khan 2015 Group I)

8 / 122

Electron microsocope makes practical use of the

9 / 122

The concept that a particle can behave like waves was given by

10 / 122

The minimum energy required by photon to create an electron-positron pair is (D.G. Khan 2015 Group II)

11 / 122

The quantity h/m°ree;c has the dimensions of

12 / 122

Wave nature of light appears in

13 / 122

Light of wave length λ falls on a metal having work function hc/λ°ree; photoelectric effect will take place only if

14 / 122

Which is the most refined form of matter? (D.G. Khan 2015 Group I)

15 / 122

A proton, accelerated through a P.D of V has a certain de-Broglie wavelength λ In order to have the same de-Broglie, an α - particle must be accelerated through a potential difference

16 / 122

Wave nature of light appears in

17 / 122

Interference and diffraction confirms

18 / 122

Antiparticle of electron is: (Swl 2015)

19 / 122

if nr and nv are number of photons emitted by a red bulb and a violet bulb respectively of equal power in a given time then

20 / 122

if h is plank's constant, The momentum of a photon of wavelength 0.01A°ree;

21 / 122

The plantinum wire becomes white at a temperature of (GRW 2016)

22 / 122

The value of Plank's constant h is given by: (FSD 2015)

23 / 122

Minimum energy required for pair production is (Sgd 2015 Group I)

24 / 122

Rest mass of photon is

25 / 122

The value of h-bar(ℏ) is

26 / 122

Compton effect shows that

27 / 122

Moving with same velocity, which of following has large wavelength of the metter waves?

28 / 122

The minimum energy required by a photon to create a electron-positron pair is (D.G. khan 2016 Group I)

29 / 122

Disintegration of photon on Striking a nucleus into an electron and positron is known as (SGD 2016 GROUP II)

30 / 122

When a photon interact with an electron which of the following characteristics of photon can increase?

31 / 122

An object of large mass and ordinary speed has

32 / 122

Light of frequecy 1.5 times the threshold frequency is incident on a photosensitive material. If the frequency is halved and intensity is doubled, the photoelectric current becomes

33 / 122

de Broglie got Nobel Prize for their work on

34 / 122

When X-rays are scattered by electrons their wavelength increases. This phenomenon is called

35 / 122

A positron is an antiparticle of (Mirpur 2015)

36 / 122

If the energy of incident photon is E ev and work function of metal is ϕ ev then which of the following is the maximum velocity of ejected photoelectron

37 / 122

When stopping potential is applied to the anode of the photocell, no current is observed. This means

38 / 122

Which light emits greater number of electron from a metal surface?

39 / 122

Potasium cathode in photocell emit electrons for a light: (LHR 2016 Group I)

40 / 122

The momentum of the moving photon is (LHR 2016 Group I)

41 / 122

A light of waelength 5000 A°ree; is incident on a metal surface whose work function is 2ev. Which of the following will be the maximum K.E of photoelectron?

42 / 122

Which of the following is the value of maximum compton shift?

43 / 122

In order to increase the K.E. of ejected photo electrons, there should be an increase in: (Bwp 2015)

44 / 122

The uncertainty in the positron and momentum can be written as

45 / 122

Two photons approach each other, their relative speed will be (MTN 2016 GROUP I)

46 / 122

Which of the following is the compton shift at an angle 90°ree;?

47 / 122

The special theory of relativity based on (D.G. khan 2016 Group II)

48 / 122

In Davisson and Germer experiment, target crystal was made up of

49 / 122

Compton shift is maximum at an angle

50 / 122

Wave nature of light appears in (Mirpur 2015)

51 / 122

With the help of 50 kV electron microscope, a resolution of _______ is possible

52 / 122

The rest mass of X-Ray photon is: (Mirpur 2016)

53 / 122

Dimensions of plank's constant are same as that of

54 / 122

Position and momentum of an electron cannot be measured simultaneously with perfect accuracy, this is

55 / 122

Einstein was awarded Nobel Prize in Physics in: (LHR 2015 Group II)

56 / 122

The value of Stefan's constant 'σ' is given by (Mirpur 2015)

57 / 122

Which of the following is the value of plank's constant is (evs)

58 / 122

Mass of photons is equal to (SGD 2016 GROUP I)

59 / 122

The screen used in electron microscope is made of _________ material

60 / 122

The photn with energy greater than 1.02 MeV can interact with matter as (MTN 2016 GROUP II)

61 / 122

The form of uncertainty principle which relates the energy of a particle and the time at which it had the energy is given by

62 / 122

The momentum of photon is given by the equation: (GRW 2015)

63 / 122

Which of the following achieve conversion of electromagnetic energy in to electrical energy

64 / 122

A photon behaves as if it had a mass equal to

65 / 122

When plantinum wire is heated, it changes to cherry red at temperature (Swl 2016)

66 / 122

The value of Plank's Constant h is: (Mtn 2015 Group II)

67 / 122

Louis de-Broglie wavelength of a particle can be expressed by

68 / 122

Compton's effect is associated with: (FSD 2015)

69 / 122

Which type of electron wavelength is used in electron microscope?

70 / 122

In order to reduce uncertainty in momentum, one must use light of

71 / 122

Energy of each positron is given by: (GRW 2015)

72 / 122

For an electron, the rest mass energy is: (Mtn 2015 Group I)

73 / 122

Electron and proton have same speed, which one has shorter wavelength associated with them?

74 / 122

The unit of Plank's constant is

75 / 122

In the subatomic world,________ can be predicted with 100% precision

76 / 122

According to _____________ electron can never be found in side the nucleus

77 / 122

In compton effect the photon behaves as a: (RWP 2015)

78 / 122

A photon of wavelength λ can be associated to have a mass equal to

79 / 122

The existence of positron was discovered in the

80 / 122

Davison and Germer received the Nobel Prize in

81 / 122

Neglecting variation of mass with velocity, The wavelenght associated with an electron having kinetic energy E is proportional to

82 / 122

Davisson and Germer got Nobel Prize for their work on

83 / 122

The value of Wien's constant is: (LHR 2015 Group II)

84 / 122

According to Stefan's law about black body radiations is (D.G. khan 2016 Group II)

85 / 122

If electron, proton and neutron have same velocity, which of them has the longest wavelength?

86 / 122

The velocity at which the mass of a body become double is (BWP 2016)

87 / 122

According to Heisenberg's second uncertainty principle, the product of energy of a particle and the time at which it has the energy is approximately equal to

88 / 122

_______ has the largest de Broglie wavelength at same speed (MTN 2016 GROUP I)

89 / 122

if h is plank's constant and c is speed of photon then which of the following is the wavelength of photon of energy E?

90 / 122

According to De-Broglie, an electron can be regarded as

91 / 122

compton shift in wave length (&inc; λ) is zero, when scattered angle of photon is (BWP 2016)

92 / 122

Compton shift &inc; λ will be equal to Compton wave length at an angle of (Sgd 2015 Group II)

93 / 122

When Plantinum is heated, it becomes orange at: (Mtn 2015 Group I)

94 / 122

Earth's orbital speed is: (Mtn 2015 Group II)

95 / 122

The value of threshold wavelength for photoelectric effect is 7000A°ree;. Which of the following radiation will not produce photoelectric effect?

96 / 122

It is now believed that light has

97 / 122

An electron is placed in a uniform electric field. A the electron moves, its de-Broglie wavelength

98 / 122

Which one of the following particles can show diffraction effect?

99 / 122

The rest mass energy of an electron positron pair is: (LHR 2015 Group I)

100 / 122

If E is energy of photon and P is momentum of photon, then velocity of light is equal to

101 / 122

de-Broglie waves are associated with

102 / 122

Of the following, the one which has the largest de-Broglie wavelength for the same speed is

103 / 122

A positron is a particle having: (Mirpur 2016)

104 / 122

Rest mass of photon is (LHR 2016 Group II)

105 / 122

All motions are n (LHR 2016 Group I)

106 / 122

Light from a source is incident on two photocells of work function 3ev and 1.5ev respectively. The energy of incident light is 4.5ev. Which of the following is the ratio of the velocities of photoelectron ejected from two photocells.

107 / 122

The work function of tungsten and sodium are 5.06ev and 2.53ev respectively. If threshold wavelength of sodium is 5896A°ree; then threshold wavelength of tungsten will be

108 / 122

If the frequency of incident light in a photoelectric experiment is doubled then

109 / 122

The work function of a metal is Xev when light of energy 2X is made incident on it maximum K.E. of emitted photoelectron will be

110 / 122

In order to observe the position of an electron with more accuracy, one must use light of

111 / 122

When plantinum wire is heated, it changes to cherry red at temperature (D.G. Khan 2016 Group I)

112 / 122

Davisson and Germer calculated the wavelength of scattered electron from the relation

113 / 122

The process of photoelectric effect depends on

114 / 122

the change in wavelength of scattered photon in comton effect is (FSD 2016)

115 / 122

Plantinum wire at 1300°ree;C becomes (Sgd 2015 Group II)

116 / 122

If measurement show a precise position for an electron, then uncertainty in the measurement of momentum of electron will be

117 / 122

Rest mass of photon is (Swl 2016)

118 / 122

An electron and proton are accelerated throught the same potential. If their masses are me and mp respectively, then the ratio of their de-broglie wavelength is

119 / 122

The rest mass of photon is: (Swl 2015)

120 / 122

A three dimensional image of remarkable quality can be achieved by modern version called

121 / 122

The de-Broglie wavelength of a particle of mass m moving with kinetic energy E is

122 / 122

We can find from de Broglie formula (RWP 2016)

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