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

Question # 2

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

Question # 3

Lyman series in the spectrum of hydrogen exists in the :

Question # 4

Balmer series was identified in:

Question # 5

Laser is a beam of:

Question # 6

The range of wavelengths of colurs in the visible colours is

Question # 7

The electric field lines start from:

Question # 8

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

Question # 9

X-ray are also known as

Question # 10

The first shell near the neucles is

Question # 11

Gaussian surface is always:

Question # 12

Braking radiation causes:

Question # 13

We can excite an atom by

Question # 14

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

Question # 15

Static electricity is produced by the transfer of:

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ECAT Physics Chapter 20 Important MCQ's

Sr.# Question Answer
1 We can excite an atom by
A. Bombardment of particles
B. Radiating photons
C. Providing potential difference
D. All answer are true
2 The He-Ne laser discharge tube is filled with:
A. 85% He
B. 15% He
C. 50% He
D. 60% He
3 Gaussian surface is always:
A. Rectangular
B. Spherical
C. Cylinder
D. Box shape
4 Graph of Black body radiation is example of
A. Band spectra
B. Continuo's spectra
C. Line spectra
D. All
5 Coulomb multiplied by volt by volt gives the unit called:
A. farad
B. Ohm
C. Second
D. joule
6 Tick the series which lie/s in. the infra-red region.
A. Pfund series
B. Brackett series
C. Paschen series
D. All of these
7 The results of spectra obtained by Balmer were expressed in 1896 by:
A.
Bohr
B. Rydberg
C. Planck
D. Rutherford
8 The natural arrangement of colours in the spectrum of white light spectrum is
A. VIBGYOR
B. ROYBGIV
C. ROYBIGV
D. BIGROYV
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 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

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