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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
Lyman series in the spectrum of hydrogen exists in the :
Question # 2
Static electricity is produced by the transfer of:
Question # 3
Energy required by an electron revolving in certain orbit to jump to an excited state is called:
Question # 4
Balmer series lies in that region of electromagnetic wave spectrum which is called:
Question # 5
Braking radiation causes:
Question # 6
If the distance between two charges is doubled,the force between them will become:
Question # 7
Gaussian surface is always:
Question # 8
The minimum wavelength of X-rays produced of 1KV potential difference is applied across the anode and cathode of the tube is
Question # 9
The lasing or active medium in He-Ne laser discharge tube is:
Question # 10
An electron of the hydrogen atom in the second orbit is called its:
Question # 11
The inkjet printer eject a thin stream of:
Question # 12
In helium Neon Laser Neon = 15% and Helium = 85% used. The lasing gas this unit is
Question # 13
The transitions of electrons in the hydrogen atom result in the emission of spectral lies in the:
Question # 14
The spectrum emitted from hydrogen filled discharge tube is:
Question # 15
The formula of Brackett series can be obtained by putting in the general formula, the value of n equal to:
Top Scorers Of Physics ECAT Pre Engineering Chapter 20 Atomic Spectra MCQ`s Test
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ECAT Physics Chapter 20 Important MCQ's
| Sr.# | Question | Answer |
|---|---|---|
| 1 | The photocopying process is called: |
A. Geography
B. Sonography
C. Xerography
D. Zerography
|
| 2 | An compared to solid matter, a crack or an air bubble allows: |
A. Great amount of X-rays to pass
B. Smallast amount of X-rays to pass
C. Very samall amount of X-rays to pass
D. Any of these
|
| 3 | 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
|
| 4 | In helium Neon Laser Neon = 15% and Helium = 85% used. The lasing gas this unit is |
A. Helium
B. Neon
C. Both
D. None of these
|
| 5 | The results of spectra obtained by Balmer were expressed in 1896 by: |
A.
Bohr
B. Rydberg
C. Planck
D. Rutherford
|
| 6 | 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
|
| 7 | The first shell near the neucles is |
A. L-shell
B. X-shell
C. N-shell
D. M-shell
|
| 8 | Selenium is: |
A. An insulator
B. A conductor
C. Both A and B
D. Excellent conductor
|
| 9 | Ultraviolet region lies in ______ series |
A. Layman
B. Balmer
C. P fund
D. B racket
|
| 10 | By CAT scans, we can detect the density difference of the order of: |
A. 1%
B. 20%
C. 30%
D. 50%
|
Test Questions
Share your comments & questions here
Salmankhan
01 Feb 2018Some mcqs having wrong answers.