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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
If the distance between two charges is doubled,the force between them will become:
Question # 2
The process of formation of spectrum is called:
Question # 3
CT scanning is the abbreviated name of
Question # 4
The range of wavelengths of colurs in the visible colours is
Question # 5
A metastable stae:
Question # 6
X-ray are also known as
Question # 7
An compared to solid matter, a crack or an air bubble allows:
Question # 8
The natural arrangement of colours in the spectrum of white light spectrum is
Question # 9
Laser is a beam of:
Question # 10
Balmer series lies in that region of electromagnetic wave spectrum which is called:
Question # 11
In case of braking radiations, when the rate of deceleration is very large, the emitted radiation corresponds to:
Question # 12
The electric field lines start from:
Question # 13
Gaussian surface is always:
Question # 14
An electron of the hydrogen atom in the second orbit is called its:
Question # 15
The results of spectra obtained by Balmer were expressed in 1896 by:
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ECAT Physics Chapter 20 Important MCQ's
| Sr.# | Question | Answer |
|---|---|---|
| 1 | Ultraviolet region lies in ______ series |
A. Layman
B. Balmer
C. P fund
D. B racket
|
| 2 | The photocopying process is called: |
A. Geography
B. Sonography
C. Xerography
D. Zerography
|
| 3 | By CAT scans, we can detect the density difference of the order of: |
A. 1%
B. 20%
C. 30%
D. 50%
|
| 4 | In flesh, light element like carbon, hydrogen and oxygen predominate. Three elements allows ______ amount of incident X-ray to pass through them |
A. Small
B. Greater
C. Equal
D. Sometimes
|
| 5 | Photons must have energy equal to |
A. ev
B. En
C. hf
D. None of these
|
| 6 | 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
|
| 7 | The first shell near the neucles is |
A. L-shell
B. X-shell
C. N-shell
D. M-shell
|
| 8 | 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
|
| 9 | Selenium is: |
A. An insulator
B. A conductor
C. Both A and B
D. Excellent conductor
|
| 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.