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MCQ's Test For ECAT Physics Chapter 20 Atomic Spectra
Try The MCQ's Test For ECAT Physics Chapter 20 Atomic Spectra
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Total Questions15
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Time Allowed20
ECAT Physics Chapter 20 Atomic Spectra
00:00
Question # 1
Balmer series was identified in:
Question # 2
Gaussian surface is always:
Question # 3
In case of braking radiations, when the rate of deceleration is very large, the emitted radiation corresponds to:
Question # 4
The value of the metastable state for Neon is
Question # 5
The lasing or active medium in He-Ne laser discharge tube is:
Question # 6
Tick the series which lie/s in. the infra-red region.
Question # 7
Energy required by an electron revolving in certain orbit to jump to an excited state is called:
Question # 8
Graph of Black body radiation is example of
Question # 9
The electric field lines start from:
Question # 10
The He-Ne laser discharge tube is filled with:
Question # 11
The natural arrangement of colours in the spectrum of white light spectrum is
Question # 12
If the distance between two charges is doubled,the force between them will become:
Question # 13
The formula of Brackett series can be obtained by putting in the general formula, the value of n equal to:
Question # 14
We can excite an atom by
Question # 15
Balmer series lies in that region of electromagnetic wave spectrum which is called:
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ECAT Physics Chapter 20 Important MCQ's
| Sr.# | Question | Answer |
|---|---|---|
| 1 | X-rays can penetrate in a solid matte through a distance of several: |
A. Kilo metres
B. Metres
C. Centimeters
D. A few angstroms
|
| 2 | Atoms of hydrogen gas can be excited by passing electric current through it when the gas is filled into the discharge tube at a pressure which is |
A. Less than atmospheric pressure
B. Much less than atmospheric pressure
C. Greater than atmospheric pressure
D. Much greater than atmospheric pressure
|
| 3 | Gaussian surface is always: |
A. Rectangular
B. Spherical
C. Cylinder
D. Box shape
|
| 4 | Braking radiation causes: |
A. Continuous spectrum
B. Line Spectrum
C. Band spectrum
D. Discrete specturm
|
| 5 | The holes created in the L and M shells are occupied by transitions of: |
A. Electrons from lower states
B. Electrons from higher state
C. Positrons from higher states
D. Electrons from K shell
|
| 6 | Selenium is: |
A. An insulator
B. A conductor
C. Both A and B
D. Excellent conductor
|
| 7 | The formula of Brackett series can be obtained by putting in the general formula, the value of n equal to: |
A.
one
B. two
C. three
D. four
|
| 8 | CT scanning is the abbreviated name of |
A. Computed Technology
B. Computed Technique
C. Computed Technology
D. Computerized Technique
|
| 9 | Consider a photon of continuous X-ray and a photon of characteristics X-ray of same wavelength. Which of the following is/are different for the two photons |
A. Frequency
B. Penetrating power
C. Energy
D. Method of creation
|
| 10 | Balmer series lies in that region of electromagnetic wave spectrum which is called: |
A. Visible region
B. Invisible region
C. Infra-red region
D. ultraviolet region
|
Test Questions