ECAT Pre General Science Physics Chapter 20 MCQ Test With Answer

MCQ's Test For ECAT Pre General Science Physics Chapter 20 Atomic Spectra

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ECAT Pre General Science Physics Chapter 20 Atomic Spectra

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Question # 1

Static electricity is produced by the transfer of:

Question # 2

The life time of metastable state is equal to

Question # 3

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

Question # 4

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

Question # 5

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

Question # 6

CT scanning is the abbreviated name of

Question # 7

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 # 8

The range of wavelengths of colurs in the visible colours is

Question # 9

Ultraviolet region lies in ______ series

Question # 10

The shell closer to the nucleus is called:

Question # 11

Tick the series which lies in the visible region:

Question # 12

Graph of Black body radiation is example of

Question # 13

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

Question # 14

Laser is a beam of:

Question # 15

The spectrum emitted from hydrogen filled discharge tube is:

Question # 16

The inkjet printer eject a thin stream of:

Question # 17

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

Question # 18

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

Question # 19

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

Question # 20

A metastable stae:

Question # 21

The value of the metastable state for Neon is

Question # 22

The He-Ne laser discharge tube is filled with:

Question # 23

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

Question # 24

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

Question # 25

The photocopying process is called:

Question # 26

Lyman series in the spectrum of hydrogen exists in the :

Question # 27

X-ray are also known as

Question # 28

X-rays produced in a tube operating at 105V. The speed of X-rays produced is

Question # 29

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

Question # 30

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 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)
2 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
3 The He-Ne laser discharge tube is filled with:
A. 85% He
B. 15% He
C. 50% He
D. 60% He
4 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
5 The first shell near the neucles is
A. L-shell
B. X-shell
C. N-shell
D. M-shell
6 Coulomb multiplied by volt by volt gives the unit called:
A. farad
B. Ohm
C. Second
D. joule
7 The photocopying process is called:
A. Geography
B. Sonography
C. Xerography
D. Zerography
8 The transitions of electrons in the hydrogen atom result in the emission of spectral lies in the:
A. Ultra red region
B. Visible region
C. Ultraviolet region
D. Any of these
9 An electron of the hydrogen atom in the second orbit is called its:
A. Ground state
B. Excited state
C. Ionized state
D. Any of these
10 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

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