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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 process of formation of spectrum is called:
Question # 2
CT scanning is the abbreviated name of
Question # 3
An electron of the hydrogen atom in the second orbit is called its:
Question # 4
The lasing or active medium in He-Ne laser discharge tube is:
Question # 5
Selenium is:
Question # 6
The formula of Brackett series can be obtained by putting in the general formula, the value of n equal to:
Question # 7
The life time of metastable state is equal to
Question # 8
Lyman series in the spectrum of hydrogen exists in the :
Question # 9
If the distance between two charges is doubled,the force between them will become:
Question # 10
Graph of Black body radiation is example of
Question # 11
Static electricity is produced by the transfer of:
Question # 12
The He-Ne laser discharge tube is filled with:
Question # 13
The inkjet printer eject a thin stream of:
Question # 14
The first series which was identified in the spectrum of hydrogen is called:
Question # 15
We can excite an atom by
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ECAT Physics Chapter 20 Important MCQ's
| Sr.# | Question | Answer |
|---|---|---|
| 1 | X-ray are also known as |
A. Roentgen rays
B. Maxwell rays
C. Plank range
D. Einstein rays
|
| 2 | X-rays produced in a tube operating at 105V. The speed of X-rays produced is |
A. 3 x 108m/s
B. 3.1 x 108m/s
C. 2.8 x 108m/s
D. 1.88 x 108m/s
|
| 3 | CT scanning is the abbreviated name of |
A. Computed Technology
B. Computed Technique
C. Computed Technology
D. Computerized Technique
|
| 4 | 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
|
| 5 | If the distance between two charges is doubled,the force between them will become: |
A. Double
B. Half
C. One third
D. One fourth
|
| 6 | The results of spectra obtained by Balmer were expressed in 1896 by: |
A.
Bohr
B. Rydberg
C. Planck
D. Rutherford
|
| 7 | The photocopying process is called: |
A. Geography
B. Sonography
C. Xerography
D. Zerography
|
| 8 | 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
|
| 9 | The lasing or active medium in He-Ne laser discharge tube is: |
A. Nitrogen
B. Helium
C. Hydrogen
D. Neon
|
| 10 | X-rays can penetrate in a solid matte through a distance of several: |
A. Kilo metres
B. Metres
C. Centimeters
D. A few angstroms
|
Test Questions
Share your comments & questions here
Salmankhan
01 Feb 2018Some mcqs having wrong answers.