ECAT Pre Engineering Physics Chapter 20 MCQ Test With Answer

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

Try The 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

Laser is a beam of:

Question # 2

Balmer series was identified in:

Question # 3

The spectrum emitted from hydrogen filled discharge tube is:

Question # 4

The formula of Brackett series can be obtained by putting in the general formula, the value of n equal to:

Question # 5

X-ray are also known as

Question # 6

Braking radiation causes:

Question # 7

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

Question # 8

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

Question # 9

Gaussian surface is always:

Question # 10

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

Question # 11

Lyman series in the spectrum of hydrogen exists in the :

Question # 12

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

Question # 13

The range of wavelengths of colurs in the visible colours is

Question # 14

The results of spectra obtained by Balmer were expressed in 1896 by:

Question # 15

The photocopying process is called:

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ECAT Physics Chapter 20 Important MCQ's

Sr.# Question Answer
1 The lasing or active medium in He-Ne laser discharge tube is:
A. Nitrogen
B. Helium
C. Hydrogen
D. Neon
2 The life time of metastable state is equal to
A. Life time of excited state
B. Greater than by excited state
C. Zero
D. Less than by excited state
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 CT scanning is the abbreviated name of
A. Computed Technology
B. Computed Technique
C. Computed Technology
D. Computerized Technique
5 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
6 Static electricity is produced by the transfer of:
A. Electrons
B. Protons
C. One fluid
D. Two fluid
7 The spectrum emitted from hydrogen filled discharge tube is:
A. Line spectrum
B. Discrete spectrum
C. And spectrum
D. Absorption spectrum
8 Braking radiation causes:
A. Continuous spectrum
B. Line Spectrum
C. Band spectrum
D. Discrete specturm
9 The results of spectra obtained by Blamer were expressed in 1896 by
A. Bohr
B. Rydberg
C. Planck
D. Rutherford
10 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

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