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

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

Question # 2

Tick the series which lies in the visible region:

Question # 3

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

Question # 4

The minimum wavelength of X-rays produced of 1KV potential difference is applied across the anode and cathode of the tube is

Question # 5

Graph of Black body radiation is example of

Question # 6

X-ray are also known as

Question # 7

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

Question # 8

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 # 9

A metastable stae:

Question # 10

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

Question # 11

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

Question # 12

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

Question # 13

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

Question # 14

The first shell near the neucles is

Question # 15

The value of the metastable state for Neon is

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ECAT Physics Chapter 20 Important MCQ's

Sr.# Question Answer
1 The first shell near the neucles is
A. L-shell
B. X-shell
C. N-shell
D. M-shell
2 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
3 The inkjet printer eject a thin stream of:
A. Water
B. Oil
C. Ink
D. Any above
4 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
5 Ultraviolet region lies in ______ series
A. Layman
B. Balmer
C. P fund
D. B racket
6 The He-Ne laser discharge tube is filled with:
A. 85% He
B. 15% He
C. 50% He
D. 60% He
7 Balmer series was identified in:
A. 1685
B. 1785
C. 1885
D. 1985
8 The lasing or active medium in He-Ne laser discharge tube is:
A. Nitrogen
B. Helium
C. Hydrogen
D. Neon
9 CT scanning is the abbreviated name of
A. Computed Technology
B. Computed Technique
C. Computed Technology
D. Computerized Technique
10 Braking radiation causes:
A. Continuous spectrum
B. Line Spectrum
C. Band spectrum
D. Discrete specturm

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