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

X-ray are also known as

Question # 2

Ultraviolet region lies in ______ series

Question # 3

Coulomb multiplied by volt by volt gives the unit called:

Question # 4

The inkjet printer eject a thin stream of:

Question # 5

Lyman series in the spectrum of hydrogen exists in the :

Question # 6

The results of spectra obtained by Balmer were expressed in 1896 by:

Question # 7

Gaussian surface is always:

Question # 8

Balmer series was identified in:

Question # 9

The electric field lines start from:

Question # 10

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

Question # 11

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

Question # 12

The He-Ne laser discharge tube is filled with:

Question # 13

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

Question # 14

The value of the metastable state for Neon is

Question # 15

We can excite an atom by

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ECAT Physics Chapter 20 Important MCQ's

Sr.# Question Answer
1 If the distance between two charges is doubled,the force between them will become:
A. Double
B. Half
C. One third
D. One fourth
2 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
3 Coulomb multiplied by volt by volt gives the unit called:
A. farad
B. Ohm
C. Second
D. joule
4 Tick the series which lie/s in. the infra-red region.
A. Pfund series
B. Brackett series
C. Paschen series
D. All of these
5 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)
6 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
7 An compared to solid matter, a crack or an air bubble allows:
A. Great amount of X-rays to pass
B. Smallast amount of X-rays to pass
C. Very samall amount of X-rays to pass
D. Any of these
8 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)
9 The natural arrangement of colours in the spectrum of white light spectrum is
A. VIBGYOR
B. ROYBGIV
C. ROYBIGV
D. BIGROYV
10 Ultraviolet region lies in ______ series
A. Layman
B. Balmer
C. P fund
D. B racket

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