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 inkjet printer eject a thin stream of:

Question # 2

Tick the series which lie/s in. the infra-red region.

Question # 3

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

Question # 4

Static electricity is produced by the transfer of:

Question # 5

Gaussian surface is always:

Question # 6

The He-Ne laser discharge tube is filled with:

Question # 7

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 # 8

Ultraviolet region lies in ______ series

Question # 9

Photons must have energy equal to

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

The photocopying process is called:

Question # 12

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

Question # 13

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

Question # 14

A metastable stae:

Question # 15

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

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ECAT Physics Chapter 20 Important MCQ's

Sr.# Question Answer
1 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
A. Frequency
B. Penetrating power
C. Energy
D. Method of creation
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 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
4 The value of the metastable state for Neon is
A. 20.66eV
B. 20.61eV
C. 19.23eV
D. 18.70eV
5 The minimum wavelength of X-rays produced of 1KV potential difference is applied across the anode and cathode of the tube is
A. 1.24 x 10-10m
B. 7.92 x 10-20m
C. 2.78 x 10-14m
D. 3.88 x 10-11m
6 Coulomb multiplied by volt by volt gives the unit called:
A. farad
B. Ohm
C. Second
D. joule
7 If the distance between two charges is doubled,the force between them will become:
A. Double
B. Half
C. One third
D. One fourth
8 Graph of Black body radiation is example of
A. Band spectra
B. Continuo's spectra
C. Line spectra
D. All
9 By CAT scans, we can detect the density difference of the order of:
A. 1%
B. 20%
C. 30%
D. 50%
10 The spectrum emitted from hydrogen filled discharge tube is:
A. Line spectrum
B. Discrete spectrum
C. And spectrum
D. Absorption spectrum

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