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

X-ray are also known as

Question # 2

Static electricity is produced by the transfer of:

Question # 3

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

Question # 4

The shell closer to the nucleus is called:

Question # 5

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

Question # 6

Spectrum represents the number of component colours present in certain light in terms of:

Question # 7

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

Question # 8

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

Question # 9

Graph of Black body radiation is example of

Question # 10

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

Question # 11

Selenium is:

Question # 12

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

Question # 13

The first shell near the neucles is

Question # 14

Braking radiation causes:

Question # 15

The range of wavelengths of colurs in the visible colours is

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ECAT Physics Chapter 20 Important MCQ's

Sr.# Question Answer
1 In flesh, light element like carbon, hydrogen and oxygen predominate. Three elements allows ______ amount of incident X-ray to pass through them
A. Small
B. Greater
C. Equal
D. Sometimes
2 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
3 X-rays can penetrate in a solid matte through a distance of several:
A. Kilo metres
B. Metres
C. Centimeters
D. A few angstroms
4 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
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 If the distance between two charges is doubled,the force between them will become:
A. Double
B. Half
C. One third
D. One fourth
7 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)
8 Gaussian surface is always:
A. Rectangular
B. Spherical
C. Cylinder
D. Box shape
9 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
10 The photocopying process is called:
A. Geography
B. Sonography
C. Xerography
D. Zerography

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