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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
Selenium is:
Question # 2
A metastable stae:
Question # 3
Static electricity is produced by the transfer of:
Question # 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
Question # 5
Tick the series which lie/s in. the infra-red region.
Question # 6
Gaussian surface is always:
Question # 7
The lasing or active medium in He-Ne laser discharge tube is:
Question # 8
Lyman series in the spectrum of hydrogen exists in the :
Question # 9
The value of the metastable state for Neon is
Question # 10
The formula of Brackett series can be obtained by putting in the general formula, the value of n equal to:
Question # 11
By CAT scans, we can detect the density difference of the order of:
Question # 12
If the distance between two charges is doubled,the force between them will become:
Question # 13
The results of spectra obtained by Balmer were expressed in 1896 by:
Question # 14
The holes created in the L and M shells are occupied by transitions of:
Question # 15
The first series which was identified in the spectrum of hydrogen is called:
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ECAT Physics Chapter 20 Important MCQ's
| Sr.# | Question | Answer |
|---|---|---|
| 1 | Tick the series which lie/s in. the infra-red region. |
A. Pfund series
B. Brackett series
C. Paschen series
D. All of these
|
| 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 | X-rays can penetrate in a solid matte through a distance of several: |
A. Kilo metres
B. Metres
C. Centimeters
D. A few angstroms
|
| 4 | Gaussian surface is always: |
A. Rectangular
B. Spherical
C. Cylinder
D. Box shape
|
| 5 | 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
|
| 6 | If the distance between two charges is doubled,the force between them will become: |
A. Double
B. Half
C. One third
D. One fourth
|
| 7 | The photocopying process is called: |
A. Geography
B. Sonography
C. Xerography
D. Zerography
|
| 8 | 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
|
| 9 | The natural arrangement of colours in the spectrum of white light spectrum is |
A. VIBGYOR
B. ROYBGIV
C. ROYBIGV
D. BIGROYV
|
| 10 | 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
|
Test Questions
Share your comments & questions here
Salmankhan
01 Feb 2018Some mcqs having wrong answers.