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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
The holes created in the L and M shells are occupied by transitions of:
Question # 3
An electron of the hydrogen atom in the second orbit is called its:
Question # 4
In case of braking radiations, when the rate of deceleration is very large, the emitted radiation corresponds to:
Question # 5
Tick the series which lies in the visible region:
Question # 6
The natural arrangement of colours in the spectrum of white light spectrum is
Question # 7
X-ray are also known as
Question # 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
Question # 9
The minimum wavelength of X-rays produced of 1KV potential difference is applied across the anode and cathode of the tube is
Question # 10
In flesh, light element like carbon, hydrogen and oxygen predominate. Three elements allows ______ amount of incident X-ray to pass through them
Question # 11
Laser is a beam of:
Question # 12
By CAT scans, we can detect the density difference of the order of:
Question # 13
The electric field lines start from:
Question # 14
The process of formation of spectrum is called:
Question # 15
Tick the series which lie/s in. the infra-red region.
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ECAT Physics Chapter 20 Important MCQ's
| Sr.# | Question | Answer |
|---|---|---|
| 1 | Selenium is: |
A. An insulator
B. A conductor
C. Both A and B
D. Excellent conductor
|
| 2 | 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
|
| 3 | Tick the series which lie/s in. the infra-red region. |
A. Pfund series
B. Brackett series
C. Paschen series
D. All of these
|
| 4 | X-rays can penetrate in a solid matte through a distance of several: |
A. Kilo metres
B. Metres
C. Centimeters
D. A few angstroms
|
| 5 | Balmer series was identified in: |
A. 1685
B. 1785
C. 1885
D. 1985
|
| 6 | The range of wavelengths of colurs in the visible colours is |
A. 140 nm to 456 nm
B. 10 nm to 56 nm
C. 410 nm to 656 nm
D. 910 nm to 956 nm
|
| 7 | 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
|
| 8 | The inkjet printer eject a thin stream of: |
A. Water
B. Oil
C. Ink
D. Any above
|
| 9 | The shell closer to the nucleus is called: |
A. N shell
B.
L shell
C. K shell
D. M shell
|
| 10 | Energy required by an electron revolving in certain orbit to jump to an excited state is called: |
A. Ionization energy
B. Ionization potential
C. Excitation energy
D. Excitation potential
|
Test Questions
Share your comments & questions here
Salmankhan
01 Feb 2018Some mcqs having wrong answers.