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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
Braking radiation causes:
Question # 2
The electric field lines start from:
Question # 3
Photons must have energy equal to
Question # 4
Energy required by an electron revolving in certain orbit to jump to an excited state is called:
Question # 5
The holes created in the L and M shells are occupied by transitions of:
Question # 6
X-rays can penetrate in a solid matte through a distance of several:
Question # 7
In flesh, light element like carbon, hydrogen and oxygen predominate. Three elements allows ______ amount of incident X-ray to pass through them
Question # 8
The value of the metastable state for Neon is
Question # 9
Lyman series in the spectrum of hydrogen exists in the :
Question # 10
Tick the series which lies in the visible region:
Question # 11
The formula of Brackett series can be obtained by putting in the general formula, the value of n equal to:
Question # 12
Laser is a beam of:
Question # 13
Static electricity is produced by the transfer of:
Question # 14
Graph of Black body radiation is example of
Question # 15
Consider a photon of continuous X-ray and a photon of characteristics X-ray of same wavelength. Which of the following is/are different for the two photons
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ECAT Physics Chapter 20 Important MCQ's
| Sr.# | Question | Answer |
|---|---|---|
| 1 | 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
|
| 2 | The lasing or active medium in He-Ne laser discharge tube is: |
A. Nitrogen
B. Helium
C. Hydrogen
D. Neon
|
| 3 | The shell closer to the nucleus is called: |
A. N shell
B.
L shell
C. K shell
D. M shell
|
| 4 | The inkjet printer eject a thin stream of: |
A. Water
B. Oil
C. Ink
D. Any above
|
| 5 | The He-Ne laser discharge tube is filled with: |
A. 85% He
B. 15% He
C. 50% He
D. 60% He
|
| 6 | Spectrum represents the number of component colours present in certain light in terms of: |
A. Wavelength
B. Frequency
C. Energy
D. Both (A) and (B)
|
| 7 | The minimum wavelength of X-rays produced of 1KV potential difference is applied across the anode and cathode of the tube is |
A. 1.24 x 10-10m
B. 7.92 x 10-20m
C. 2.78 x 10-14m
D. 3.88 x 10-11m
|
| 8 | Consider a photon of continuous X-ray and a photon of characteristics X-ray of same wavelength. Which of the following is/are different for the two photons |
A. Frequency
B. Penetrating power
C. Energy
D. Method of creation
|
| 9 | 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
|
| 10 | Balmer series was identified in: |
A. 1685
B. 1785
C. 1885
D. 1985
|
Test Questions
Share your comments & questions here
Salmankhan
01 Feb 2018Some mcqs having wrong answers.