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

Balmer series was identified in:

Question # 2

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

Question # 3

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

Question # 4

Graph of Black body radiation is example of

Question # 5

The value of the metastable state for Neon is

Question # 6

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

Question # 7

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

Question # 8

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

Question # 9

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

Question # 10

An electron of the hydrogen atom in the second orbit is called its:

Question # 11

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

Question # 12

The He-Ne laser discharge tube is filled with:

Question # 13

The life time of metastable state is equal to

Question # 14

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

Question # 15

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

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ECAT Physics Chapter 20 Important MCQ's

Sr.# Question Answer
1 Tick the series which lies in the visible region:
A. Lyman series
B. Balmer series
C. Paschen series
D. Brackett series
2 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)
3 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
4 The inkjet printer eject a thin stream of:
A. Water
B. Oil
C. Ink
D. Any above
5 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
6 The spectrum emitted from hydrogen filled discharge tube is:
A. Line spectrum
B. Discrete spectrum
C. And spectrum
D. Absorption spectrum
7 Balmer series lies in that region of electromagnetic wave spectrum which is called:
A. Visible region
B. Invisible region
C. Infra-red region
D. ultraviolet region
8 CT scanning is the abbreviated name of
A. Computed Technology
B. Computed Technique
C. Computed Technology
D. Computerized Technique
9 Gaussian surface is always:
A. Rectangular
B. Spherical
C. Cylinder
D. Box shape
10 Photons must have energy equal to
A. ev
B. En
C. hf
D. None of these

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