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

The life time of metastable state is equal to

Question # 2

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

Question # 3

CT scanning is the abbreviated name of

Question # 4

Coulomb multiplied by volt by volt gives the unit called:

Question # 5

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

Question # 6

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

Question # 7

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

Question # 8

Selenium is:

Question # 9

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

Question # 10

Atoms of hydrogen gas can be excited by passing electric current through it when the gas is filled into the discharge tube at a pressure which is

Question # 11

The He-Ne laser discharge tube is filled with:

Question # 12

The shell closer to the nucleus is called:

Question # 13

Braking radiation causes:

Question # 14

A metastable stae:

Question # 15

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

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ECAT Physics Chapter 20 Important MCQ's

Sr.# Question Answer
1 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
2 The photocopying process is called:
A. Geography
B. Sonography
C. Xerography
D. Zerography
3 Laser is a beam of:
A. Visible light
B. Infra red light
C. Ultra violet light
D. Violet light only
4 The first shell near the neucles is
A. L-shell
B. X-shell
C. N-shell
D. M-shell
5 Balmer series was identified in:
A. 1685
B. 1785
C. 1885
D. 1985
6 The shell closer to the nucleus is called:
A. N shell
B.
L shell
C. K shell
D. M shell
7 The results of spectra obtained by Balmer were expressed in 1896 by:
A.
Bohr
B. Rydberg
C. Planck
D. Rutherford
8 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)
9 The spectrum emitted from hydrogen filled discharge tube is:
A. Line spectrum
B. Discrete spectrum
C. And spectrum
D. Absorption spectrum
10 Static electricity is produced by the transfer of:
A. Electrons
B. Protons
C. One fluid
D. Two fluid

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