ECAT Pre Computer Science Chapter 20 MCQ Test With Answer

MCQ's Test For ECAT Physics Chapter 20 Atomic Spectra

Try The MCQ's Test For ECAT Physics Chapter 20 Atomic Spectra

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ECAT Physics Chapter 20 Atomic Spectra

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Question # 1

The process of formation of spectrum is called:

Question # 2

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

Question # 3

Laser is a beam of:

Question # 4

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

Question # 5

We can excite an atom by

Question # 6

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

Question # 7

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

Question # 8

Selenium is:

Question # 9

The inkjet printer eject a thin stream of:

Question # 10

Coulomb multiplied by volt by volt gives the unit called:

Question # 11

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 # 12

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

Question # 13

X-ray are also known as

Question # 14

CT scanning is the abbreviated name of

Question # 15

Lyman series in the spectrum of hydrogen exists in the :

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ECAT Physics Chapter 20 Important MCQ's

Sr.# Question Answer
1 Graph of Black body radiation is example of
A. Band spectra
B. Continuo's spectra
C. Line spectra
D. All
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 Tick the series which lies in the visible region:
A. Lyman series
B. Balmer series
C. Paschen series
D. Brackett series
5 The inkjet printer eject a thin stream of:
A. Water
B. Oil
C. Ink
D. Any above
6 X-ray are also known as
A. Roentgen rays
B. Maxwell rays
C. Plank range
D. Einstein rays
7 If the distance between two charges is doubled,the force between them will become:
A. Double
B. Half
C. One third
D. One fourth
8 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)
9 The value of the metastable state for Neon is
A. 20.66eV
B. 20.61eV
C. 19.23eV
D. 18.70eV
10 The range of wavelengths of colurs in the visible colours is
A. 140 nm to 456 nm
B. 10 nm to 56 nm
C. 410 nm to 656 nm
D. 910 nm to 956 nm

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