ECAT Pre Computer Science Chapter 20 MCQ Test With Answer

MCQ's Test For ECAT Physics Chapter 20 Atomic Spectra

Try The MCQ's Test For ECAT Physics Chapter 20 Atomic Spectra

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ECAT Physics Chapter 20 Atomic Spectra

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Question # 1

Selenium is:

Question # 2

Graph of Black body radiation is example of

Question # 3

The results of spectra obtained by Blamer were expressed in 1896 by

Question # 4

The first series which was identified in the spectrum of hydrogen is called:

Question # 5

The value of the metastable state for Neon is

Question # 6

Balmer series was identified in:

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

X-rays produced in a tube operating at 105V. The speed of X-rays produced is

Question # 9

The formula of Brackett series can be obtained by putting in the general formula, the value of n equal to:

Question # 10

Lyman series in the spectrum of hydrogen exists in the :

Question # 11

Spectrum represents the number of component colours present in certain light in terms of:

Question # 12

The holes created in the L and M shells are occupied by transitions of:

Question # 13

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 # 14

The photocopying process is called:

Question # 15

Energy required by an electron revolving in certain orbit to jump to an excited state is called:

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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 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
3 The lasing or active medium in He-Ne laser discharge tube is:
A. Nitrogen
B. Helium
C. Hydrogen
D. Neon
4 The inkjet printer eject a thin stream of:
A. Water
B. Oil
C. Ink
D. Any above
5 Graph of Black body radiation is example of
A. Band spectra
B. Continuo's spectra
C. Line spectra
D. All
6 X-rays can penetrate in a solid matte through a distance of several:
A. Kilo metres
B. Metres
C. Centimeters
D. A few angstroms
7 CT scanning is the abbreviated name of
A. Computed Technology
B. Computed Technique
C. Computed Technology
D. Computerized Technique
8 The spectrum emitted from hydrogen filled discharge tube is:
A. Line spectrum
B. Discrete spectrum
C. And spectrum
D. Absorption spectrum
9 A metastable stae:
A. Is an excited state
B. Is that in which excited electron is stable
C. Is that in which excited electron is usually unstable
D. Means a time interval of 10-8second
10 The photocopying process is called:
A. Geography
B. Sonography
C. Xerography
D. Zerography

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