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MCQ's Test For Physics ECAT Pre Engineering Chapter 20 Atomic Spectra
Try The MCQ's Test For Physics ECAT Pre Engineering Chapter 20 Atomic Spectra
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Total Questions15
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Time Allowed20
Physics ECAT Pre Engineering Chapter 20 Atomic Spectra
00:00
Question # 1
The spectrum emitted from hydrogen filled discharge tube is:
Question # 2
The minimum wavelength of X-rays produced of 1KV potential difference is applied across the anode and cathode of the tube is
Question # 3
The lasing or active medium in He-Ne laser discharge tube is:
Question # 4
The results of spectra obtained by Blamer were expressed in 1896 by
Question # 5
In case of braking radiations, when the rate of deceleration is very large, the emitted radiation corresponds to:
Question # 6
Ultraviolet region lies in ______ series
Question # 7
Balmer series lies in that region of electromagnetic wave spectrum which is called:
Question # 8
X-rays produced in a tube operating at 105V. The speed of X-rays produced is
Question # 9
The life time of metastable state is equal to
Question # 10
The photocopying process is called:
Question # 11
The electric field lines start from:
Question # 12
Gaussian surface is always:
Question # 13
If the distance between two charges is doubled,the force between them will become:
Question # 14
The value of the metastable state for Neon is
Question # 15
The He-Ne laser discharge tube is filled with:
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ECAT Physics Chapter 20 Important MCQ's
| Sr.# | Question | Answer |
|---|---|---|
| 1 | The shell closer to the nucleus is called: |
A. N shell
B.
L shell
C. K shell
D. M shell
|
| 2 | The inkjet printer eject a thin stream of: |
A. Water
B. Oil
C. Ink
D. Any above
|
| 3 | Lyman series in the spectrum of hydrogen exists in the : |
A. Infra-red region
B. Visible region
C. Ultraviolet region
D. Both(A) and (B)
|
| 4 | 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
|
| 5 | X-rays can penetrate in a solid matte through a distance of several: |
A. Kilo metres
B. Metres
C. Centimeters
D. A few angstroms
|
| 6 | The He-Ne laser discharge tube is filled with: |
A. 85% He
B. 15% He
C. 50% He
D. 60% He
|
| 7 | 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
|
| 8 | The value of the metastable state for Neon is |
A. 20.66eV
B. 20.61eV
C. 19.23eV
D. 18.70eV
|
| 9 | Laser is a beam of: |
A. Visible light
B. Infra red light
C. Ultra violet light
D. Violet light only
|
| 10 | Tick the series which lies in the visible region: |
A. Lyman series
B. Balmer series
C. Paschen series
D. Brackett series
|
Test Questions
Share your comments & questions here
Salmankhan
01 Feb 2018Some mcqs having wrong answers.