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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
A metastable stae:
Question # 2
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
Question # 3
Tick the series which lie/s in. the infra-red region.
Question # 4
The first shell near the neucles is
Question # 5
Balmer series was identified in:
Question # 6
The range of wavelengths of colurs in the visible colours is
Question # 7
Laser is a beam of:
Question # 8
The lasing or active medium in He-Ne laser discharge tube is:
Question # 9
Tick the series which lies in the visible region:
Question # 10
Energy required by an electron revolving in certain orbit to jump to an excited state is called:
Question # 11
The life time of metastable state is equal to
Question # 12
In flesh, light element like carbon, hydrogen and oxygen predominate. Three elements allows ______ amount of incident X-ray to pass through them
Question # 13
The results of spectra obtained by Balmer were expressed in 1896 by:
Question # 14
The shell closer to the nucleus is called:
Question # 15
An electron of the hydrogen atom in the second orbit is called its:
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ECAT Physics Chapter 20 Important MCQ's
| Sr.# | Question | Answer |
|---|---|---|
| 1 | Static electricity is produced by the transfer of: |
A. Electrons
B. Protons
C. One fluid
D. Two fluid
|
| 2 | The results of spectra obtained by Balmer were expressed in 1896 by: |
A.
Bohr
B. Rydberg
C. Planck
D. Rutherford
|
| 3 | Selenium is: |
A. An insulator
B. A conductor
C. Both A and B
D. Excellent conductor
|
| 4 | The results of spectra obtained by Blamer were expressed in 1896 by |
A. Bohr
B. Rydberg
C. Planck
D. Rutherford
|
| 5 | Braking radiation causes: |
A. Continuous spectrum
B. Line Spectrum
C. Band spectrum
D. Discrete specturm
|
| 6 | The process of formation of spectrum is called: |
A. Interference
B. Spectroscopy
C. Dispersion
D. Reflection
|
| 7 | Gaussian surface is always: |
A. Rectangular
B. Spherical
C. Cylinder
D. Box shape
|
| 8 | The value of the metastable state for Neon is |
A. 20.66eV
B. 20.61eV
C. 19.23eV
D. 18.70eV
|
| 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 | The spectrum emitted from hydrogen filled discharge tube is: |
A. Line spectrum
B. Discrete spectrum
C. And spectrum
D. Absorption spectrum
|
Test Questions
Share your comments & questions here
Salmankhan
01 Feb 2018Some mcqs having wrong answers.