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

The process of formation of spectrum is called:

Question # 2

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

Question # 3

Tick the series which lies in the visible region:

Question # 4

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

Question # 5

The inkjet printer eject a thin stream of:

Question # 6

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

Question # 7

The range of wavelengths of colurs in the visible colours is

Question # 8

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

Question # 9

X-ray are also known as

Question # 10

Gaussian surface is always:

Question # 11

Balmer series was identified in:

Question # 12

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

Question # 13

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

Question # 14

The first series which was identified in the spectrum of hydrogen is called:

Question # 15

The He-Ne laser discharge tube is filled with:

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ECAT Physics Chapter 20 Important MCQ's

Sr.# Question Answer
1 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
2 Photons must have energy equal to
A. ev
B. En
C. hf
D. None of these
3 Graph of Black body radiation is example of
A. Band spectra
B. Continuo's spectra
C. Line spectra
D. All
4 The results of spectra obtained by Blamer were expressed in 1896 by
A. Bohr
B. Rydberg
C. Planck
D. Rutherford
5 The inkjet printer eject a thin stream of:
A. Water
B. Oil
C. Ink
D. Any above
6 Balmer series was identified in:
A. 1685
B. 1785
C. 1885
D. 1985
7 The life time of metastable state is equal to
A. Life time of excited state
B. Greater than by excited state
C. Zero
D. Less than by excited state
8 The minimum wavelength of X-rays produced of 1KV potential difference is applied across the anode and cathode of the tube is
A. 1.24 x 10-10m
B. 7.92 x 10-20m
C. 2.78 x 10-14m
D. 3.88 x 10-11m
9 Braking radiation causes:
A. Continuous spectrum
B. Line Spectrum
C. Band spectrum
D. Discrete specturm
10 X-ray are also known as
A. Roentgen rays
B. Maxwell rays
C. Plank range
D. Einstein rays

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