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 electric field lines start from:

Question # 2

The holes created in the L and M shells are occupied by transitions of:

Question # 3

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

Question # 4

The process of formation of spectrum is called:

Question # 5

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

Question # 6

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

Question # 7

Ultraviolet region lies in ______ series

Question # 8

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

Question # 9

The range of wavelengths of colurs in the visible colours is

Question # 10

Tick the series which lies in the visible region:

Question # 11

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

Question # 12

Static electricity is produced by the transfer of:

Question # 13

The inkjet printer eject a thin stream of:

Question # 14

Braking radiation causes:

Question # 15

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

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ECAT Physics Chapter 20 Important MCQ's

Sr.# Question Answer
1 X-rays can penetrate in a solid matte through a distance of several:
A. Kilo metres
B. Metres
C. Centimeters
D. A few angstroms
2 Braking radiation causes:
A. Continuous spectrum
B. Line Spectrum
C. Band spectrum
D. Discrete specturm
3 The electric field lines start from:
A. Positive charge
B. Negative charge
C. Either A and B
D. Neutron
4 Lyman series in the spectrum of hydrogen exists in the :
A. Infra-red region
B. Visible region
C. Ultraviolet region
D. Both(A) and (B)
5 The results of spectra obtained by Balmer were expressed in 1896 by:
A.
Bohr
B. Rydberg
C. Planck
D. Rutherford
6 Static electricity is produced by the transfer of:
A. Electrons
B. Protons
C. One fluid
D. Two fluid
7 Gaussian surface is always:
A. Rectangular
B. Spherical
C. Cylinder
D. Box shape
8 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
9 The photocopying process is called:
A. Geography
B. Sonography
C. Xerography
D. Zerography
10 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

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