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

00:00
Question # 1

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

Question # 2

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

Question # 3

Tick the series which lies in the visible region:

Question # 4

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

Question # 5

If the distance between two charges is doubled,the force between them will become:

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

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

Question # 8

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

Question # 9

The value of the metastable state for Neon is

Question # 10

The first shell near the neucles is

Question # 11

The photocopying process is called:

Question # 12

Gaussian surface is always:

Question # 13

Selenium is:

Question # 14

Laser is a beam of:

Question # 15

Static electricity is produced by the transfer of:

Question # 16

Graph of Black body radiation is example of

Question # 17

The range of wavelengths of colurs in the visible colours is

Question # 18

Lyman series in the spectrum of hydrogen exists in the :

Question # 19

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

Question # 20

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

Question # 21

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

Question # 22

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

Question # 23

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

Question # 24

CT scanning is the abbreviated name of

Question # 25

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

Question # 26

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

Question # 27

The inkjet printer eject a thin stream of:

Question # 28

Balmer series was identified in:

Question # 29

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

Question # 30

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

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ECAT Physics Chapter 20 Important MCQ's

Sr.# Question Answer
1 A metastable stae:
A. Is an excited state
B. Is that in which excited electron is stable
C. Is that in which excited electron is usually unstable
D. Means a time interval of 10-8second
2 The spectrum emitted from hydrogen filled discharge tube is:
A. Line spectrum
B. Discrete spectrum
C. And spectrum
D. Absorption spectrum
3 Tick the series which lies in the visible region:
A. Lyman series
B. Balmer series
C. Paschen series
D. Brackett series
4 The natural arrangement of colours in the spectrum of white light spectrum is
A. VIBGYOR
B. ROYBGIV
C. ROYBIGV
D. BIGROYV
5 Braking radiation causes:
A. Continuous spectrum
B. Line Spectrum
C. Band spectrum
D. Discrete specturm
6 Gaussian surface is always:
A. Rectangular
B. Spherical
C. Cylinder
D. Box shape
7 The first shell near the neucles is
A. L-shell
B. X-shell
C. N-shell
D. M-shell
8 Coulomb multiplied by volt by volt gives the unit called:
A. farad
B. Ohm
C. Second
D. joule
9 X-rays can penetrate in a solid matte through a distance of several:
A. Kilo metres
B. Metres
C. Centimeters
D. A few angstroms
10 The lasing or active medium in He-Ne laser discharge tube is:
A. Nitrogen
B. Helium
C. Hydrogen
D. Neon

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