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

00:00
Question # 1

Static electricity is produced by the transfer of:

Question # 2

The life time of metastable state is equal to

Question # 3

The He-Ne laser discharge tube is filled with:

Question # 4

Braking radiation causes:

Question # 5

Gaussian surface is always:

Question # 6

The process of formation of spectrum is called:

Question # 7

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

Question # 8

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 # 9

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

Question # 10

Lyman series in the spectrum of hydrogen exists in the :

Question # 11

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

Question # 12

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

Question # 13

The photocopying process is called:

Question # 14

The shell closer to the nucleus is called:

Question # 15

Tick the series which lies in the visible region:

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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 The He-Ne laser discharge tube is filled with:
A. 85% He
B. 15% He
C. 50% He
D. 60% He
3 Photons must have energy equal to
A. ev
B. En
C. hf
D. None of these
4 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
5 Graph of Black body radiation is example of
A. Band spectra
B. Continuo's spectra
C. Line spectra
D. All
6 X-ray are also known as
A. Roentgen rays
B. Maxwell rays
C. Plank range
D. Einstein rays
7 The transitions of electrons in the hydrogen atom result in the emission of spectral lies in the:
A. Ultra red region
B. Visible region
C. Ultraviolet region
D. Any of these
8 The lasing or active medium in He-Ne laser discharge tube is:
A. Nitrogen
B. Helium
C. Hydrogen
D. Neon
9 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)
10 By CAT scans, we can detect the density difference of the order of:
A. 1%
B. 20%
C. 30%
D. 50%

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