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 lasing or active medium in He-Ne laser discharge tube is:

Question # 2

Atoms of hydrogen gas can be excited by passing electric current through it when the gas is filled into the discharge tube at a pressure which is

Question # 3

Tick the series which lies in the visible region:

Question # 4

CT scanning is the abbreviated name of

Question # 5

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

Question # 6

Braking radiation causes:

Question # 7

X-ray are also known as

Question # 8

The results of spectra obtained by Blamer were expressed in 1896 by

Question # 9

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

Question # 10

Static electricity is produced by the transfer of:

Question # 11

We can excite an atom by

Question # 12

Lyman series in the spectrum of hydrogen exists in the :

Question # 13

Coulomb multiplied by volt by volt gives the unit called:

Question # 14

The spectrum emitted from hydrogen filled discharge tube is:

Question # 15

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

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ECAT Physics Chapter 20 Important MCQ's

Sr.# Question Answer
1 By CAT scans, we can detect the density difference of the order of:
A. 1%
B. 20%
C. 30%
D. 50%
2 The value of the metastable state for Neon is
A. 20.66eV
B. 20.61eV
C. 19.23eV
D. 18.70eV
3 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
4 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)
5 In helium Neon Laser Neon = 15% and Helium = 85% used. The lasing gas this unit is
A. Helium
B. Neon
C. Both
D. None of these
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 natural arrangement of colours in the spectrum of white light spectrum is
A. VIBGYOR
B. ROYBGIV
C. ROYBIGV
D. BIGROYV
8 The electric field lines start from:
A. Positive charge
B. Negative charge
C. Either A and B
D. Neutron
9 X-rays can penetrate in a solid matte through a distance of several:
A. Kilo metres
B. Metres
C. Centimeters
D. A few angstroms
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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