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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
The lasing or active medium in He-Ne laser discharge tube is:
Question # 2
Tick the series which lies in the visible region:
Question # 3
Graph of Black body radiation is example of
Question # 4
The electric field lines start from:
Question # 5
The photocopying process is called:
Question # 6
We can excite an atom by
Question # 7
If the distance between two charges is doubled,the force between them will become:
Question # 8
X-rays produced in a tube operating at 105V. The speed of X-rays produced is
Question # 9
In case of braking radiations, when the rate of deceleration is very large, the emitted radiation corresponds to:
Question # 10
The natural arrangement of colours in the spectrum of white light spectrum is
Question # 11
The range of wavelengths of colurs in the visible colours is
Question # 12
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
Question # 13
The He-Ne laser discharge tube is filled with:
Question # 14
Coulomb multiplied by volt by volt gives the unit called:
Question # 15
Energy required by an electron revolving in certain orbit to jump to an excited state is called:
Top Scorers Of ECAT Physics Chapter 20 Atomic Spectra MCQ`s Test
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ECAT Physics Chapter 20 Important MCQ's
| Sr.# | Question | Answer |
|---|---|---|
| 1 | The He-Ne laser discharge tube is filled with: |
A. 85% He
B. 15% He
C. 50% He
D. 60% He
|
| 2 | The transitions of electrons in the hydrogen atom result in the emission of spectral lies in the: |
A. Ultra red region
B. Visible region
C. Ultraviolet region
D. Any of these
|
| 3 | The photocopying process is called: |
A. Geography
B. Sonography
C. Xerography
D. Zerography
|
| 4 | The minimum wavelength of X-rays produced of 1KV potential difference is applied across the anode and cathode of the tube is |
A. 1.24 x 10-10m
B. 7.92 x 10-20m
C. 2.78 x 10-14m
D. 3.88 x 10-11m
|
| 5 | In case of braking radiations, when the rate of deceleration is very large, the emitted radiation corresponds to: |
A. Short wavelength
B. Large wavelength
C. Very large wavelenth
D. Low frequency
|
| 6 | 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
|
| 7 | The first shell near the neucles is |
A. L-shell
B. X-shell
C. N-shell
D. M-shell
|
| 8 | The first series which was identified in the spectrum of hydrogen is called: |
A. Lyman series
B. Balmer series
C. Paschen series
D. Brackett series
|
| 9 | Ultraviolet region lies in ______ series |
A. Layman
B. Balmer
C. P fund
D. B racket
|
| 10 | The process of formation of spectrum is called: |
A. Interference
B. Spectroscopy
C. Dispersion
D. Reflection
|
Test Questions