Chapter 20 Atomic Spectra Physics 12th Class Punjab MCQ Tests
12th Class Physics Chapter 20 MCQ Tests
Chapter 20 of 12th Class Physics has 20 questions. If you take an online MCQ test, the system will randomly choose the questions. If you want to take the quiz by chapter then click the start test button.
Total Questions: 20
Total Marks: 20
Time: 20 Mins
Total Questions: 20
Total Marks: 20
Time: 20 Mins
20Min : 00 Sec Remaining
Question # 1
A tungsten is struck by electrons that have been accelerated from rest through 40 kV potential difference. What is the shortest wavelength of the bremsstrahlung radiation emitted?
Question # 2
The shortest wavelength of x-rays emitted from x-rays tube depends on which of the following factors?
Question # 3
What type of spectrum is shown by the radiation emitted from hydrogen filled discharge tube?
Question # 4
Where does the meta-stable state exist?
Question # 5
Why the spontaneous emission is not much suitable for the production of laser?
Question # 6
What happens when an electron in an atom goes from a lower orbit to a higher orbit?
Question # 7
Which state is nearly identical in helium and neon?
Question # 8
How the maximum energy of the x-rays emitted from an x-rays tube can be increased?
Question # 9
Why can x-rays be reflected, diffracted and polarized just like any other waves?
Question # 10
If radius of first orbit of an atom is R 1 = 0.053 n m , then what will be the radius of second orbit R 2 ?
Question # 11
The continuous x-rays is caused by which of the following factors?
Question # 12
Which of the following has the simplest spectrum?
Question # 13
Balmer empirical formula explains the electromagnetic radiations of an excited atom in terms of which of the following factors?
Question # 14
Which of the following phenomenon occurs when the atom emits a photon of energy h f = E 2 − E 1 in any arbitrary direction?
Question # 15
What happens to the energy, when an electron jumps from first to the second orbit in hydrogen atom?
Question # 16
Which of the following is the dimensional formula of Rydberg's constant?
Question # 17
What is the lifetime of meta-stable state?
Question # 18
Which of the following is the longest wavelength of Lyman series?
Question # 19
Why only certain discrete lines are found in atomic spectra?
Question # 20
In x-ray tube, how the intensity of emitted x-ray beam can be increased?
Total Questions
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Question # 1
A tungsten is struck by electrons that have been accelerated from rest through 40 kV potential difference. What is the shortest wavelength of the bremsstrahlung radiation emitted?
Question # 2
The shortest wavelength of x-rays emitted from x-rays tube depends on which of the following factors?
Question # 3
What type of spectrum is shown by the radiation emitted from hydrogen filled discharge tube?
Question # 4
Where does the meta-stable state exist?
Question # 5
Why the spontaneous emission is not much suitable for the production of laser?
Question # 6
What happens when an electron in an atom goes from a lower orbit to a higher orbit?
Question # 7
Which state is nearly identical in helium and neon?
Question # 8
How the maximum energy of the x-rays emitted from an x-rays tube can be increased?
Question # 9
Why can x-rays be reflected, diffracted and polarized just like any other waves?
Question # 10
If radius of first orbit of an atom is R 1 = 0.053 n m , then what will be the radius of second orbit R 2 ?
Question # 11
The continuous x-rays is caused by which of the following factors?
Question # 12
Which of the following has the simplest spectrum?
Question # 13
Balmer empirical formula explains the electromagnetic radiations of an excited atom in terms of which of the following factors?
Question # 14
Which of the following phenomenon occurs when the atom emits a photon of energy h f = E 2 − E 1 in any arbitrary direction?
Question # 15
What happens to the energy, when an electron jumps from first to the second orbit in hydrogen atom?
Question # 16
Which of the following is the dimensional formula of Rydberg's constant?
Question # 17
What is the lifetime of meta-stable state?
Question # 18
Which of the following is the longest wavelength of Lyman series?
Question # 19
Why only certain discrete lines are found in atomic spectra?
Question # 20
In x-ray tube, how the intensity of emitted x-ray beam can be increased?
Total Questions
1234567891011121314151617181920
Physics MCQ Test by Topics
- +20.1 Atomic Spectra
- +20.1 Atomic Spectrum of Hydrogen
- +20.2 Bohrs Model of the Hydrogen Atom
- +20.2 de Broglies interpretation of Bohars Orbits
- +20.2 Quantized Radii
- +20.2 Quantized Energies
- +20.2 Hydrogen Emission Spectrum
- +20.3 Inner Shell Transitions and Characteristic X-Rays
- +20.3 Production of X-Rays
- +20.3 The Continuous X-Ray Spectrum
- +20.3 Uses of X-Ray
- +20.3 CAT - Scanner
- +20.3 Biological Effects of X-Rays
- +20.4 Uncertainty Within the Atom
- +20.5 Laser
- +20.5 Spontaneous and Stimulated Emission
- +20.5 Population Inversion and Laser Action
- +20.5 Helium - Neon Laser
- +20.5 Uses of laser in medicine and industry
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