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

Gaussian surface is always:

Question # 2

The lasing or active medium in He-Ne laser discharge tube is:

Question # 3

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 # 4

X-ray are also known as

Question # 5

Ultraviolet region lies in ______ series

Question # 6

In flesh, light element like carbon, hydrogen and oxygen predominate. Three elements allows ______ amount of incident X-ray to pass through them

Question # 7

The spectrum emitted from hydrogen filled discharge tube is:

Question # 8

The results of spectra obtained by Balmer were expressed in 1896 by:

Question # 9

An compared to solid matter, a crack or an air bubble allows:

Question # 10

Balmer series was identified in:

Question # 11

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

Question # 12

Lyman series in the spectrum of hydrogen exists in the :

Question # 13

In helium Neon Laser Neon = 15% and Helium = 85% used. The lasing gas this unit is

Question # 14

Static electricity is produced by the transfer of:

Question # 15

The value of the metastable state for Neon is

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ECAT Physics Chapter 20 Important MCQ's

Sr.# Question Answer
1 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
2 The results of spectra obtained by Blamer were expressed in 1896 by
A. Bohr
B. Rydberg
C. Planck
D. Rutherford
3 Tick the series which lies in the visible region:
A. Lyman series
B. Balmer series
C. Paschen series
D. Brackett series
4 The spectrum emitted from hydrogen filled discharge tube is:
A. Line spectrum
B. Discrete spectrum
C. And spectrum
D. Absorption spectrum
5 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
6 Static electricity is produced by the transfer of:
A. Electrons
B. Protons
C. One fluid
D. Two fluid
7 By CAT scans, we can detect the density difference of the order of:
A. 1%
B. 20%
C. 30%
D. 50%
8 The He-Ne laser discharge tube is filled with:
A. 85% He
B. 15% He
C. 50% He
D. 60% He
9 If the distance between two charges is doubled,the force between them will become:
A. Double
B. Half
C. One third
D. One fourth
10 Coulomb multiplied by volt by volt gives the unit called:
A. farad
B. Ohm
C. Second
D. joule

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