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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
In flesh, light element like carbon, hydrogen and oxygen predominate. Three elements allows ______ amount of incident X-ray to pass through them
Question # 2
In case of braking radiations, when the rate of deceleration is very large, the emitted radiation corresponds to:
Question # 3
CT scanning is the abbreviated name of
Question # 4
The shell closer to the nucleus is called:
Question # 5
The spectrum emitted from hydrogen filled discharge tube is:
Question # 6
Laser is a beam of:
Question # 7
Tick the series which lie/s in. the infra-red region.
Question # 8
The natural arrangement of colours in the spectrum of white light spectrum is
Question # 9
The results of spectra obtained by Balmer were expressed in 1896 by:
Question # 10
The formula of Brackett series can be obtained by putting in the general formula, the value of n equal to:
Question # 11
Coulomb multiplied by volt by volt gives the unit called:
Question # 12
Energy required by an electron revolving in certain orbit to jump to an excited state is called:
Question # 13
X-ray are also known as
Question # 14
Spectrum represents the number of component colours present in certain light in terms of:
Question # 15
The lasing or active medium in He-Ne laser discharge tube is:
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ECAT Physics Chapter 20 Important MCQ's
| Sr.# | Question | Answer |
|---|---|---|
| 1 | The spectrum emitted from hydrogen filled discharge tube is: |
A. Line spectrum
B. Discrete spectrum
C. And spectrum
D. Absorption spectrum
|
| 2 | Selenium is: |
A. An insulator
B. A conductor
C. Both A and B
D. Excellent conductor
|
| 3 | The value of the metastable state for Neon is |
A. 20.66eV
B. 20.61eV
C. 19.23eV
D. 18.70eV
|
| 4 | 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
|
| 5 | Tick the series which lie/s in. the infra-red region. |
A. Pfund series
B. Brackett series
C. Paschen series
D. All of these
|
| 6 | The life time of metastable state is equal to |
A. Life time of excited state
B. Greater than by excited state
C. Zero
D. Less than by excited state
|
| 7 | By CAT scans, we can detect the density difference of the order of: |
A. 1%
B. 20%
C. 30%
D. 50%
|
| 8 | Static electricity is produced by the transfer of: |
A. Electrons
B. Protons
C. One fluid
D. Two fluid
|
| 9 | Braking radiation causes: |
A. Continuous spectrum
B. Line Spectrum
C. Band spectrum
D. Discrete specturm
|
| 10 | The results of spectra obtained by Blamer were expressed in 1896 by |
A. Bohr
B. Rydberg
C. Planck
D. Rutherford
|
Test Questions
Share your comments & questions here
Salmankhan
01 Feb 2018Some mcqs having wrong answers.