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

Balmer series was identified in:

Question # 2

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

Question # 3

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

Question # 4

Lyman series in the spectrum of hydrogen exists in the :

Question # 5

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

Question # 6

Laser is a beam of:

Question # 7

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

Question # 8

Coulomb multiplied by volt by volt gives the unit called:

Question # 9

Balmer series lies in that region of electromagnetic wave spectrum which is called:

Question # 10

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

Question # 11

Braking radiation causes:

Question # 12

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

Question # 13

The electric field lines start from:

Question # 14

The spectrum emitted from hydrogen filled discharge tube is:

Question # 15

The range of wavelengths of colurs in the visible colours is

Question # 16

Selenium is:

Question # 17

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

Question # 18

The photocopying process is called:

Question # 19

The inkjet printer eject a thin stream of:

Question # 20

We can excite an atom by

Question # 21

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

Question # 22

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

Question # 23

The He-Ne laser discharge tube is filled with:

Question # 24

X-ray are also known as

Question # 25

Static electricity is produced by the transfer of:

Question # 26

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

Question # 27

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

Question # 28

Ultraviolet region lies in ______ series

Question # 29

CT scanning is the abbreviated name of

Question # 30

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

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ECAT Physics Chapter 20 Important MCQ's

Sr.# Question Answer
1 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
A. Frequency
B. Penetrating power
C. Energy
D. Method of creation
2 In helium Neon Laser Neon = 15% and Helium = 85% used. The lasing gas this unit is
A. Helium
B. Neon
C. Both
D. None of these
3 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
A. Less than atmospheric pressure
B. Much less than atmospheric pressure
C. Greater than atmospheric pressure
D. Much greater than atmospheric pressure
4 The photocopying process is called:
A. Geography
B. Sonography
C. Xerography
D. Zerography
5 The natural arrangement of colours in the spectrum of white light spectrum is
A. VIBGYOR
B. ROYBGIV
C. ROYBIGV
D. BIGROYV
6 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
7 The spectrum emitted from hydrogen filled discharge tube is:
A. Line spectrum
B. Discrete spectrum
C. And spectrum
D. Absorption spectrum
8 The first shell near the neucles is
A. L-shell
B. X-shell
C. N-shell
D. M-shell
9 Spectrum represents the number of component colours present in certain light in terms of:
A. Wavelength
B. Frequency
C. Energy
D. Both (A) and (B)
10 Photons must have energy equal to
A. ev
B. En
C. hf
D. None of these

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