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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 value of the metastable state for Neon is
Question # 2
Laser is a beam of:
Question # 3
In case of braking radiations, when the rate of deceleration is very large, the emitted radiation corresponds to:
Question # 4
By CAT scans, we can detect the density difference of the order of:
Question # 5
The range of wavelengths of colurs in the visible colours is
Question # 6
The natural arrangement of colours in the spectrum of white light spectrum is
Question # 7
Spectrum represents the number of component colours present in certain light in terms of:
Question # 8
Energy required by an electron revolving in certain orbit to jump to an excited state is called:
Question # 9
Balmer series lies in that region of electromagnetic wave spectrum which is called:
Question # 10
The minimum wavelength of X-rays produced of 1KV potential difference is applied across the anode and cathode of the tube is
Question # 11
X-rays produced in a tube operating at 105V. The speed of X-rays produced is
Question # 12
The He-Ne laser discharge tube is filled with:
Question # 13
Lyman series in the spectrum of hydrogen exists in the :
Question # 14
The photocopying process is called:
Question # 15
The electric field lines start from:
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ECAT Physics Chapter 20 Important MCQ's
| Sr.# | Question | Answer |
|---|---|---|
| 1 | Laser is a beam of: |
A. Visible light
B. Infra red light
C. Ultra violet light
D. Violet light only
|
| 2 | 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)
|
| 3 | 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
|
| 4 | Gaussian surface is always: |
A. Rectangular
B. Spherical
C. Cylinder
D. Box shape
|
| 5 | The spectrum emitted from hydrogen filled discharge tube is: |
A. Line spectrum
B. Discrete spectrum
C. And spectrum
D. Absorption spectrum
|
| 6 | Photons must have energy equal to |
A. ev
B. En
C. hf
D. None of these
|
| 7 | 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
|
| 8 | 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
|
| 9 | The inkjet printer eject a thin stream of: |
A. Water
B. Oil
C. Ink
D. Any above
|
| 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.