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

The spectrum emitted from hydrogen filled discharge tube is:

Question # 2

Gaussian surface is always:

Question # 3

An electron of the hydrogen atom in the second orbit is called its:

Question # 4

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

Question # 5

Balmer series lies in that region of electromagnetic wave spectrum which is called:

Question # 6

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 # 7

X-ray are also known as

Question # 8

By CAT scans, we can detect the density difference of the order of:

Question # 9

Ultraviolet region lies in ______ series

Question # 10

The photocopying process is called:

Question # 11

A metastable stae:

Question # 12

Atoms of hydrogen gas can be excited by passing electric current through it when the gas is filled into the discharge tube at a pressure which is

Question # 13

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

Question # 14

If the distance between two charges is doubled,the force between them will become:

Question # 15

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

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ECAT Physics Chapter 20 Important MCQ's

Sr.# Question Answer
1 An electron of the hydrogen atom in the second orbit is called its:
A. Ground state
B. Excited state
C. Ionized state
D. Any of these
2 Tick the series which lie/s in. the infra-red region.
A. Pfund series
B. Brackett series
C. Paschen series
D. All of these
3 Graph of Black body radiation is example of
A. Band spectra
B. Continuo's spectra
C. Line spectra
D. All
4 The inkjet printer eject a thin stream of:
A. Water
B. Oil
C. Ink
D. Any above
5 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
6 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)
7 The results of spectra obtained by Balmer were expressed in 1896 by:
A.
Bohr
B. Rydberg
C. Planck
D. Rutherford
8 Atoms of hydrogen gas can be excited by passing electric current through it when the gas is filled into the discharge tube at a pressure which is
A. Less than atmospheric pressure
B. Much less than atmospheric pressure
C. Greater than atmospheric pressure
D. Much greater than atmospheric pressure
9 The natural arrangement of colours in the spectrum of white light spectrum is
A. VIBGYOR
B. ROYBGIV
C. ROYBIGV
D. BIGROYV
10 By CAT scans, we can detect the density difference of the order of:
A. 1%
B. 20%
C. 30%
D. 50%

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