12th Class PHYSICS Chapter No.9 ATOMIC SPECTRA Test No.2

Physics MCQs 2nd Year Chapter No.9 ATOMIC SPECTRA 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.

PHYSICS 
Chapter Name : ATOMIC SPECTRA
Chapter No. 09  [Test No.2]
2nd Year
Multiple Choice Questions

 








Book Name :  PHYSICS
Chapter No. 09 (Test No.2)
Chapter Name : ATOMIC SPECTRA 
Total MCQ from Text Book :  95
Book Version  :
2022

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 : 95
Total Time :   95 minutes




89

GRADE 12 - PHYSICS CHAPTER NO. 9 ATOMIC SPECTRA Test No. 2

GRADE 12 - PHYSICS CHAPTER NO. 9 ATOMIC SPECTRA Test No. 2

1 / 95

The maximum number of electrons in the Bohr orbit can be

2 / 95

For pair production, minimum energy of photon must be:

3 / 95

The life time of meta stable is:

4 / 95

Meta stable state is:

5 / 95

The equation of Rydberg constant is given by:

6 / 95

K? -Rays are produced due to tranistion of electrons from:

7 / 95

The meta stable state of Helium is nearly at:

8 / 95

Population inversion is sustained in the neon gas relative to an energy level of:

9 / 95

Which of the following is the energy required (in ev)for ionizing an excited hydrogen atom?

10 / 95

An excited atom can reside in a meta stable state for:

11 / 95

Laser principle are of _____________ kinds

12 / 95

Which of the following is the value of principle quantum number of an ionized atom

13 / 95

Production of X-Rays is the reverse process of:

14 / 95

In Helium-neon laser, red laser light has energy:

15 / 95

Which of the following is the dimensional formula of Rydberg's constant

16 / 95

The difference between soft and hard x-rays is of:

17 / 95

Helium and neon have nearly identical:

18 / 95

Which is not characteristic of Laser:

19 / 95

Which of the following is the energy required to remove an electron from the second orbit of hydrogen atom? (ionization potential of H. atom =13.6v)

20 / 95

Which of the following series of hydrogen spectrum lies in ultra violet region

21 / 95

In X-Rays tube the accelerating potential appllied at the anode is V0. Which of the following will be the minimum wavelength of the emitted x-rays?

22 / 95

Accroding to uncertainity principle, for hydrogen atom of radius 5 x 10 -11 m, the speed of electron is:

23 / 95

The value of Rydberg's Constant is:

24 / 95

The dimensions of Planck's Constant is same as that of:

25 / 95

Atom can reside in metastable state for:

26 / 95

Balmer Series lies in:

27 / 95

Which of the following is the ratio of the energies of hydrogen atom in its first to second exceited state?

28 / 95

Electrons of mass m and charge e are accelerated through a potential difference V and strike the target of ray tube. Which of the following is the maximum speed of these electrons?

29 / 95

The excited states in which the life time of an electron is of the order of 10-3 sec are called:

30 / 95

The incident photon is absorbed by an atom in the ground state (E1) thereby leaving the atom in the excited state (E2) is called:

31 / 95

Laser emitted by laser device has:

32 / 95

The radius of hydrogen atom is about:

33 / 95

An electron can never by found:

34 / 95

The value of radius of 1st Bohr's orbit:

35 / 95

Photon emitted in inner shell transition are:

36 / 95

Helium-neon laser, discharge tube contains neon:

37 / 95

Helium-neon laser discharge tube contains neon:

38 / 95

A potential difference of 42000 V is used in an X-Rays tube to acclerate electrons. Which of the following is the maximum frequency of the emitted x-rays?

39 / 95

Gases begin to conduct electricity at low pressure because:

40 / 95

The relation of paschen series is given as:

41 / 95

Which of the following is the K.E of electron that is is accelerated through a potential of 100v

42 / 95

Laser is a beam of light, which is:

43 / 95

The radius of first Bohr orbit in hydrogen atom is:

44 / 95

In a electronic transition atom cannot emit:

45 / 95

Which of the following is the relation between energy (E) and momentum (P) of a photon?

46 / 95

Production of X-Rays is the reverse process of:

47 / 95

If electron jumps from second orbit to first orbit in hydrogen atom it emots photon of:

48 / 95

The radius of 10th orbit in hydrogen atom is:

49 / 95

If V is accelerating voltage then which of the following will be the maximum frequency of emitted X-Rays form X-Rays tube?

50 / 95

In discharge tube, electricity is conducted by:

51 / 95

The ratio of minimum to maximum wavelength in Balmer's series is:

52 / 95

The intensity of X-Rays from a Coolidge tube is plotted against wavelength ? as shown in the figure. The minimum wavelength found is ?c and the wavelength of the K? line is ?k As The accelerating voltage is increased:

53 / 95

Balmer Series lies in:

54 / 95

Hydrogen atom does not emit X-Rays because

55 / 95

Laser can be made by creating:

56 / 95

Laser has use in:

57 / 95

In hydrogen atom electron jumps from the first orbit to second orbit, its radius

58 / 95

In Helium-neon laser, laser light generated has the colour:

59 / 95

In an X-Ray tube, the intensity of emitted X-Rays beam is increased by:

60 / 95

The life time of most excited state atoms is about:

61 / 95

The most common type of lasers used in physics laboratries are:

62 / 95

The following gas was identified in the sun using spectoscopy:

63 / 95

Life of meta stable of most atoms is about:

64 / 95

Atom is nearly:

65 / 95

When an electron in an atom goes from a lower to a higher orbit

66 / 95

X-Rays are maximum absorbed by:

67 / 95

Emission of photon of energy hf = E2-E1 in any arbitrary direction is:

68 / 95

The shortest wavelength of X-Rays emitted from X-Rays tube depends on the:

69 / 95

In electronic transition , atom cannot emit:

70 / 95

In Helium-neon laser, generated red light laser has the wavelength:

71 / 95

Laser can only be produced if an atom is in its:

72 / 95

In three phase voltage across any two lines is a:

73 / 95

Which of the following is the ratio of K.E. to the P.E of the electron in any Bohr orbit of hydrogen atom?

74 / 95

In helium-Neon laser, discharge tube is filled with Neon gas:

75 / 95

In Laser beam, all the photons:

76 / 95

If V1 is the speed of electron in first orbit of hydrogen atom then velocity of the electron in 4th orbit will be Rydberg constant R and velocity of light C?

77 / 95

Laser is the acronym of:

78 / 95

The meta stable state of neon is nearly at:

79 / 95

The speed of electron in the nth orbit is given as:

80 / 95

Balmer series lies in:

81 / 95

Production of X-Rays can be regarded as the inverse of:

82 / 95

When electron jumps from fourth orbit to the second orbit, one gets the:

83 / 95

Which of the following is the frequency of the series limit of Balmer series of hydrogen atom in terms of Rydberg constant R and velocity of Light C?

84 / 95

The maximum uncertainity in the measurement of positron of an electron inside the nucleus is of the order of:

85 / 95

Life time of excited states (meta stable) is:

86 / 95

For which of the following transition infrared radiation will be obtained:

87 / 95

The common door bell requires a voltage of about:

88 / 95

Hydrogen atom spectrum does not lie in:

89 / 95

Laser beam can be used to generate three dimensional images of objects in a process called:

90 / 95

Helium-neon laser, discharge tube contains helium:

91 / 95

If electron in hydrogen atom jumps from third orbit to second orbit the emitted radiation has wavelength (R is Rydberg's constant):

92 / 95

Production of X-Rays can be regarded as the inverse of:

93 / 95

With increasing quantum number the energy difference between in adjacent levels in atoms:

94 / 95

When electron in hydrogen atoms jumps from the second orbit to the first orbit, the wavelength of the emitted radiation is ? which of the following will be the wavelength of emitted radiation when electron jump from third to first orbit?

95 / 95

The size of the nucleus of an atom (i.e. diameter of the nucleus) is the order of:

Your score is

The average score is 37%

0%

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