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

Question # 2

The value of the metastable state for Neon is

Question # 3

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

Question # 4

Graph of Black body radiation is example of

Question # 5

Braking radiation causes:

Question # 6

Gaussian surface is always:

Question # 7

The electric field lines start from:

Question # 8

Laser is a beam of:

Question # 9

A metastable stae:

Question # 10

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

Question # 11

Tick the series which lies in the visible region:

Question # 12

In flesh, light element like carbon, hydrogen and oxygen predominate. Three elements allows ______ amount of incident X-ray to pass through them

Question # 13

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

Question # 14

Photons must have energy equal to

Question # 15

Lyman series in the spectrum of hydrogen exists in the :

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ECAT Physics Chapter 20 Important MCQ's

Sr.# Question Answer
1 We can excite an atom by
A. Bombardment of particles
B. Radiating photons
C. Providing potential difference
D. All answer are true
2 If the distance between two charges is doubled,the force between them will become:
A. Double
B. Half
C. One third
D. One fourth
3 Graph of Black body radiation is example of
A. Band spectra
B. Continuo's spectra
C. Line spectra
D. All
4 The inkjet printer eject a thin stream of:
A. Water
B. Oil
C. Ink
D. Any above
5 The results of spectra obtained by Blamer were expressed in 1896 by
A. Bohr
B. Rydberg
C. Planck
D. Rutherford
6 X-rays produced in a tube operating at 105V. The speed of X-rays produced is
A. 3 x 108m/s
B. 3.1 x 108m/s
C. 2.8 x 108m/s
D. 1.88 x 108m/s
7 Laser is a beam of:
A. Visible light
B. Infra red light
C. Ultra violet light
D. Violet light only
8 The process of formation of spectrum is called:
A. Interference
B. Spectroscopy
C. Dispersion
D. Reflection
9 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
10 Static electricity is produced by the transfer of:
A. Electrons
B. Protons
C. One fluid
D. Two fluid

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