ECAT Pre Computer Science Chapter 20 MCQ Test With Answer

MCQ's Test For ECAT Physics Chapter 20 Atomic Spectra

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ECAT Physics Chapter 20 Atomic Spectra

00:00
Question # 1

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

Question # 2

Tick the series which lies in the visible region:

Question # 3

The shell closer to the nucleus is called:

Question # 4

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

Question # 5

Ultraviolet region lies in ______ series

Question # 6

The life time of metastable state is equal to

Question # 7

The process of formation of spectrum is called:

Question # 8

X-rays can penetrate in a solid matte through a distance of several:

Question # 9

The transitions of electrons in the hydrogen atom result in the emission of spectral lies in the:

Question # 10

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

Question # 11

The photocopying process is called:

Question # 12

The first shell near the neucles is

Question # 13

Static electricity is produced by the transfer of:

Question # 14

X-ray are also known as

Question # 15

Lyman series in the spectrum of hydrogen exists in the :

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ECAT Physics Chapter 20 Important MCQ's

Sr.# Question Answer
1 The He-Ne laser discharge tube is filled with:
A. 85% He
B. 15% He
C. 50% He
D. 60% He
2 The formula of Brackett series can be obtained by putting in the general formula, the value of n equal to:
A.
one
B. two
C. three
D. four
3 The first series which was identified in the spectrum of hydrogen is called:
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 We can excite an atom by
A. Bombardment of particles
B. Radiating photons
C. Providing potential difference
D. All answer are true
6 The photocopying process is called:
A. Geography
B. Sonography
C. Xerography
D. Zerography
7 CT scanning is the abbreviated name of
A. Computed Technology
B. Computed Technique
C. Computed Technology
D. Computerized Technique
8 The inkjet printer eject a thin stream of:
A. Water
B. Oil
C. Ink
D. Any above
9 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
10 Lyman series in the spectrum of hydrogen exists in the :
A. Infra-red region
B. Visible region
C. Ultraviolet region
D. Both(A) and (B)

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