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

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

Question # 2

The natural arrangement of colours in the spectrum of white light spectrum is

Question # 3

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

Question # 4

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

Question # 5

The life time of metastable state is equal to

Question # 6

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

Question # 7

CT scanning is the abbreviated name of

Question # 8

The range of wavelengths of colurs in the visible colours is

Question # 9

Braking radiation causes:

Question # 10

The electric field lines start from:

Question # 11

Balmer series lies in that region of electromagnetic wave spectrum which is called:

Question # 12

Photons must have energy equal to

Question # 13

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

Question # 14

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

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 spectrum emitted from hydrogen filled discharge tube is:
A. Line spectrum
B. Discrete spectrum
C. And spectrum
D. Absorption spectrum
2 An electron of the hydrogen atom in the second orbit is called its:
A. Ground state
B. Excited state
C. Ionized state
D. Any of these
3 Graph of Black body radiation is example of
A. Band spectra
B. Continuo's spectra
C. Line spectra
D. All
4 X-rays produced in a tube operating at 105V. The speed of X-rays produced is
A. 3 x 108m/s
B. 3.1 x 108m/s
C. 2.8 x 108m/s
D. 1.88 x 108m/s
5 CT scanning is the abbreviated name of
A. Computed Technology
B. Computed Technique
C. Computed Technology
D. Computerized Technique
6 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)
7 The first series which was identified in the spectrum of hydrogen is called:
A. Lyman series
B. Balmer series
C. Paschen series
D. Brackett series
8 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
9 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
A. Frequency
B. Penetrating power
C. Energy
D. Method of creation
10 Tick the series which lie/s in. the infra-red region.
A. Pfund series
B. Brackett series
C. Paschen series
D. All of these

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