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

00:00
Question # 1

Ultraviolet region lies in ______ series

Question # 2

The life time of metastable state is equal to

Question # 3

Laser is a beam of:

Question # 4

The inkjet printer eject a thin stream of:

Question # 5

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

Question # 6

X-ray are also known as

Question # 7

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

Question # 8

The process of formation of spectrum is called:

Question # 9

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

Question # 10

Selenium is:

Question # 11

Static electricity is produced by the transfer of:

Question # 12

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

Question # 13

Graph of Black body radiation is example of

Question # 14

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 # 15

An compared to solid matter, a crack or an air bubble allows:

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ECAT Physics Chapter 20 Important MCQ's

Sr.# Question Answer
1 Static electricity is produced by the transfer of:
A. Electrons
B. Protons
C. One fluid
D. Two fluid
2 Selenium is:
A. An insulator
B. A conductor
C. Both A and B
D. Excellent conductor
3 The photocopying process is called:
A. Geography
B. Sonography
C. Xerography
D. Zerography
4 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
5 Graph of Black body radiation is example of
A. Band spectra
B. Continuo's spectra
C. Line spectra
D. All
6 The He-Ne laser discharge tube is filled with:
A. 85% He
B. 15% He
C. 50% He
D. 60% He
7 Braking radiation causes:
A. Continuous spectrum
B. Line Spectrum
C. Band spectrum
D. Discrete specturm
8 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
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 results of spectra obtained by Blamer were expressed in 1896 by
A. Bohr
B. Rydberg
C. Planck
D. Rutherford

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  • Salmankhan

    Salmankhan

    01 Feb 2018

    Some mcqs having wrong answers.

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