ECAT Pre Computer Science Chapter 20 MCQ Test With Answer

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

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

Question # 2

The range of wavelengths of colurs in the visible colours is

Question # 3

Balmer series was identified in:

Question # 4

We can excite an atom by

Question # 5

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

Question # 6

The photocopying process is called:

Question # 7

The process of formation of spectrum is called:

Question # 8

Lyman series in the spectrum of hydrogen exists in the :

Question # 9

Selenium is:

Question # 10

X-ray are also known as

Question # 11

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

Question # 12

The first shell near the neucles is

Question # 13

Ultraviolet region lies in ______ series

Question # 14

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

Question # 15

The inkjet printer eject a thin stream of:

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ECAT Physics Chapter 20 Important MCQ's

Sr.# Question Answer
1 The process of formation of spectrum is called:
A. Interference
B. Spectroscopy
C. Dispersion
D. Reflection
2 The formula of Brackett series can be obtained by putting in the general formula, the value of n equal to:
A.
one
B. two
C. three
D. four
3 If the distance between two charges is doubled,the force between them will become:
A. Double
B. Half
C. One third
D. One fourth
4 Coulomb multiplied by volt by volt gives the unit called:
A. farad
B. Ohm
C. Second
D. joule
5 Selenium is:
A. An insulator
B. A conductor
C. Both A and B
D. Excellent conductor
6 Tick the series which lie/s in. the infra-red region.
A. Pfund series
B. Brackett series
C. Paschen series
D. All of these
7 Tick the series which lies in the visible region:
A. Lyman series
B. Balmer series
C. Paschen series
D. Brackett series
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 first shell near the neucles is
A. L-shell
B. X-shell
C. N-shell
D. M-shell
10 Laser is a beam of:
A. Visible light
B. Infra red light
C. Ultra violet light
D. Violet light only

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