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

A metastable stae:

Question # 2

Laser is a beam of:

Question # 3

The electric field lines start from:

Question # 4

CT scanning is the abbreviated name of

Question # 5

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

Question # 6

Graph of Black body radiation is example of

Question # 7

Gaussian surface is always:

Question # 8

The life time of metastable state is equal to

Question # 9

The range of wavelengths of colurs in the visible colours is

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

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

Question # 12

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

Question # 13

The He-Ne laser discharge tube is filled with:

Question # 14

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

Question # 15

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

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ECAT Physics Chapter 20 Important MCQ's

Sr.# Question Answer
1 Tick the series which lie/s in. the infra-red region.
A. Pfund series
B. Brackett series
C. Paschen series
D. All of these
2 Laser is a beam of:
A. Visible light
B. Infra red light
C. Ultra violet light
D. Violet light only
3 In case of braking radiations, when the rate of deceleration is very large, the emitted radiation corresponds to:
A. Short wavelength
B. Large wavelength
C. Very large wavelenth
D. Low frequency
4 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
5 The results of spectra obtained by Balmer were expressed in 1896 by:
A.
Bohr
B. Rydberg
C. Planck
D. Rutherford
6 The photocopying process is called:
A. Geography
B. Sonography
C. Xerography
D. Zerography
7 The range of wavelengths of colurs in the visible colours is
A. 140 nm to 456 nm
B. 10 nm to 56 nm
C. 410 nm to 656 nm
D. 910 nm to 956 nm
8 The process of formation of spectrum is called:
A. Interference
B. Spectroscopy
C. Dispersion
D. Reflection
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 The first shell near the neucles is
A. L-shell
B. X-shell
C. N-shell
D. M-shell

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