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Physics FSC Part 2 Chapter 20 Online MCQ's Test MCQs With Answers
Question # 1
In Helium Neon laser, the discharge tube is filled with
Choose an answer
80% He, 20% Neon
85% He, 15% Neon
83% He, 17% Neon
90% He, 10% Neon
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Question # 2
Energy produced due to fission of uranium atom is:
Choose an answer
500MeV
200MeV
700MeV
750MEV
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Question # 3
Which is not true for X rays
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X rays are not defected by electric field
X rays are polarized
X rays consist of electromagnetic waves
X rays can be diffracted by grating
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Question # 4
The series in visible region is:
Choose an answer
Balmer series
Pfund series
Paschen series
None of above
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Question # 5
For Holography we use
Choose an answer
X ray
Laser
gama rays
Beta rays
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Question # 6
Frequency of x-rays depends upon.
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Number of electrons striking target
Accelerating potencial
Nature of the target
Both B and C
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Question # 7
Which of the following is one of the spectral series of atomic hydrogen?
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Brockett series
Balmer series
P fund series
All of above
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Question # 8
1 rad =
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0.001Gy
0.01Gy
0.1Gy
1.01Gy
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Question # 9
In Helium Neon laser, discharge tube is filled with Neon gas.
Choose an answer
10%
15%
85%
90%
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Question # 10
In according with Bohr's theory the K.E of the electron is equal to:
Choose an answer
ke
2
/2r
Ze
2
/r
Ze
2
/r
2
Ze
2
/2r
2
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Question # 11
X-rays were discovered by
Choose an answer
Curie
Henry Becquerel
Rontgen
None of these
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Question # 12
Laser is a beam of light which is
Choose an answer
Monochromatic
Coherent
Unidirectional
All of these
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Question # 13
The shortest wave length is Bracket series has wave length.
Choose an answer
16/Rn
Rn/16
16 Rn
4 Rn
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Question # 14
Which series lies in the ultraviolet region.
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Balmer series
Bracket series
Ptund series
Lyman series
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Question # 15
If 13.6 eV energy is required to ionize the hydrogen atom, then the required energy to remove an electron from n=2 is:
Choose an answer
10.2 eV
0 eV
3.4 eV
6.8 eV
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Question # 16
Which is not characteristic of Laser.
Choose an answer
Monochromatic
Coherent
Intense
Multi direction
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Question # 17
If electron jumps from second orbit to first orbit in hydrogen atom it emits photon of.
Choose an answer
3.40 eV
10.20 eV
13.6 eV
3.8 eV
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