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

The spectrum emitted from hydrogen filled discharge tube is:

Question # 2

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

Question # 3

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

Question # 4

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

Question # 5

The range of wavelengths of colurs in the visible colours is

Question # 6

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

Question # 7

The shell closer to the nucleus is called:

Question # 8

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

Question # 9

The electric field lines start from:

Question # 10

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

Question # 11

Braking radiation causes:

Question # 12

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

Question # 13

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

Question # 14

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

Question # 15

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

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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 Spectrum represents the number of component colours present in certain light in terms of:
A. Wavelength
B. Frequency
C. Energy
D. Both (A) and (B)
3 Ultraviolet region lies in ______ series
A. Layman
B. Balmer
C. P fund
D. B racket
4 The spectrum emitted from hydrogen filled discharge tube is:
A. Line spectrum
B. Discrete spectrum
C. And spectrum
D. Absorption spectrum
5 X-rays can penetrate in a solid matte through a distance of several:
A. Kilo metres
B. Metres
C. Centimeters
D. A few angstroms
6 The natural arrangement of colours in the spectrum of white light spectrum is
A. VIBGYOR
B. ROYBGIV
C. ROYBIGV
D. BIGROYV
7 CT scanning is the abbreviated name of
A. Computed Technology
B. Computed Technique
C. Computed Technology
D. Computerized Technique
8 The results of spectra obtained by Blamer were expressed in 1896 by
A. Bohr
B. Rydberg
C. Planck
D. Rutherford
9 The photocopying process is called:
A. Geography
B. Sonography
C. Xerography
D. Zerography
10 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

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