ECAT Pre Computer Science Chapter 20 MCQ Test With Answer

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

Question # 2

The electric field lines start from:

Question # 3

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

Question # 4

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

Question # 5

The value of the metastable state for Neon is

Question # 6

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

Question # 7

Photons must have energy equal to

Question # 8

Ultraviolet region lies in ______ series

Question # 9

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

Question # 10

X-ray are also known as

Question # 11

Tick the series which lies in the visible region:

Question # 12

CT scanning is the abbreviated name of

Question # 13

The photocopying process is called:

Question # 14

Coulomb multiplied by volt by volt gives the unit called:

Question # 15

The shell closer to the nucleus is called:

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ECAT Physics Chapter 20 Important MCQ's

Sr.# Question Answer
1 The shell closer to the nucleus is called:
A. N shell
B.
L shell
C. K shell
D. M shell
2 Balmer series was identified in:
A. 1685
B. 1785
C. 1885
D. 1985
3 Graph of Black body radiation is example of
A. Band spectra
B. Continuo's spectra
C. Line spectra
D. All
4 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
A. Less than atmospheric pressure
B. Much less than atmospheric pressure
C. Greater than atmospheric pressure
D. Much greater than atmospheric pressure
5 Consider a photon of continuous X-ray and a photon of characteristics X-ray of same wavelength. Which of the following is/are different for the two photons
A. Frequency
B. Penetrating power
C. Energy
D. Method of creation
6 Tick the series which lie/s in. the infra-red region.
A. Pfund series
B. Brackett series
C. Paschen series
D. All of these
7 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)
8 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
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 spectrum emitted from hydrogen filled discharge tube is:
A. Line spectrum
B. Discrete spectrum
C. And spectrum
D. Absorption spectrum

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