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

X-rays can penetrate in a solid matte through a distance of several:

Question # 2

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

Question # 3

An electron of the hydrogen atom in the second orbit is called its:

Question # 4

Lyman series in the spectrum of hydrogen exists in the :

Question # 5

The shell closer to the nucleus is called:

Question # 6

Tick the series which lies in the visible region:

Question # 7

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

Question # 8

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

Question # 9

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 # 10

CT scanning is the abbreviated name of

Question # 11

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

Question # 12

The photocopying process is called:

Question # 13

The He-Ne laser discharge tube is filled with:

Question # 14

By CAT scans, we can detect the density difference of the order of:

Question # 15

The process of formation of spectrum is called:

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ECAT Physics Chapter 20 Important MCQ's

Sr.# Question Answer
1 Photons must have energy equal to
A. ev
B. En
C. hf
D. None of these
2 The holes created in the L and M shells are occupied by transitions of:
A. Electrons from lower states
B. Electrons from higher state
C. Positrons from higher states
D. Electrons from K shell
3 The results of spectra obtained by Blamer were expressed in 1896 by
A. Bohr
B. Rydberg
C. Planck
D. Rutherford
4 Selenium is:
A. An insulator
B. A conductor
C. Both A and B
D. Excellent conductor
5 Balmer series was identified in:
A. 1685
B. 1785
C. 1885
D. 1985
6 CT scanning is the abbreviated name of
A. Computed Technology
B. Computed Technique
C. Computed Technology
D. Computerized Technique
7 The results of spectra obtained by Balmer were expressed in 1896 by:
A.
Bohr
B. Rydberg
C. Planck
D. Rutherford
8 X-ray are also known as
A. Roentgen rays
B. Maxwell rays
C. Plank range
D. Einstein rays
9 Laser is a beam of:
A. Visible light
B. Infra red light
C. Ultra violet light
D. Violet light only
10 The He-Ne laser discharge tube is filled with:
A. 85% He
B. 15% He
C. 50% He
D. 60% He

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  • Salmankhan

    Salmankhan

    01 Feb 2018

    Some mcqs having wrong answers.

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