ECAT Pre Engineering Physics Chapter 20 MCQ Test With Answer

MCQ's Test For Physics ECAT Pre Engineering Chapter 20 Atomic Spectra

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Physics ECAT Pre Engineering Chapter 20 Atomic Spectra

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Question # 1

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

Question # 2

The photocopying process is called:

Question # 3

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

Question # 4

The spectrum emitted from hydrogen filled discharge tube is:

Question # 5

Graph of Black body radiation is example of

Question # 6

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

Question # 7

In case of braking radiations, when the rate of deceleration is very large, the emitted radiation corresponds to:

Question # 8

The natural arrangement of colours in the spectrum of white light spectrum is

Question # 9

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

Question # 10

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

Question # 11

The shell closer to the nucleus is called:

Question # 12

Braking radiation causes:

Question # 13

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

Question # 14

The range of wavelengths of colurs in the visible colours is

Question # 15

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

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ECAT Physics Chapter 20 Important MCQ's

Sr.# Question Answer
1 Balmer series was identified in:
A. 1685
B. 1785
C. 1885
D. 1985
2 X-rays produced in a tube operating at 105V. The speed of X-rays produced is
A. 3 x 108m/s
B. 3.1 x 108m/s
C. 2.8 x 108m/s
D. 1.88 x 108m/s
3 Laser is a beam of:
A. Visible light
B. Infra red light
C. Ultra violet light
D. Violet light only
4 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
5 The lasing or active medium in He-Ne laser discharge tube is:
A. Nitrogen
B. Helium
C. Hydrogen
D. Neon
6 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
7 The He-Ne laser discharge tube is filled with:
A. 85% He
B. 15% He
C. 50% He
D. 60% He
8 Selenium is:
A. An insulator
B. A conductor
C. Both A and B
D. Excellent conductor
9 The shell closer to the nucleus is called:
A. N shell
B.
L shell
C. K shell
D. M shell
10 CT scanning is the abbreviated name of
A. Computed Technology
B. Computed Technique
C. Computed Technology
D. Computerized Technique

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