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PPSC Physics Chapter 8 Scientists, Their Inventions and discoveries MCQs With Answers
Question # 1
Davison and Germer received the Nobel Prize in
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1929
1931
1935
1937
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Question # 2
Who discovered the exclusion principle which states that no two electrons can occupy the same quantum mechanical state in a given system.
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Neils Bohr
Issac Newton
Wolfgang Pauli
Max Planck
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Question # 3
Who discovered a phenomenon of thermos electricity.
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Peltier
Joule
Seeback
thomson
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Question # 4
J.R. Rydberg Obtained a formula to describe the wavelength of the hydrogen atom in
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1785
1885
1936
1966
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Question # 5
Prince Louis and vector de Brogtle got Nobel Prize for their work on.
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The dual nature of particles
The wave nature of particles
the corpuscular nature of particles
All of the above
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Question # 6
Photophone was invented by
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Graham bell
Galileo
Michelson
Faraday
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Question # 7
Light travels perpendicular to electric and magnetic fields and requires no material medium, was proposed by.
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Einstein
Max planck
Maxwell
Bragg
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Question # 8
The wave nature of light was proposed by
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Thomas Young
Fresnel
Maxwell
Huygen
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Question # 9
Commutator was invented in
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1820
1830
1834
1840
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Question # 10
Who pointed out that both wave and particle aspects are required for the complete description of both radiation and matter.
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Davison and Germer
J.J.Thomson
Neil Bohr
Compton
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Question # 11
Michelson's interferometer was devised in.
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1801
1825
1867
1881
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Question # 12
Geiger counter was designed by
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Wilson
Geiger and Muller
Lawrence
Mosely
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Question # 13
Who invented commutator.
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William Sturgeon
William Smith
Michael Faraday
Mosely
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Question # 14
The first demonstration of wave nature of light was provided in 1801 by the experiment of
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HHuygen
Thomas young
Fresnel
Maxwell
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Question # 15
Wave theory of light was proposed by
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Newton
Thomas Young
Maxwell
Huygen
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Question # 16
The first artificially produced nuclear transmutation was accomplished by.
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Curie
Rutherford
Becquerel
Chadwick
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Question # 17
Which scientist announced for the first time that the universe is expanding.
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Einstein
Newton
Edward Hubble
Karl Marx
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Question # 18
Which of the following pair is correct.
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Rutherford - x-rays
Roentgen - Electron
Chadwick - Neutron
J.J. Thomson -Photon
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Question # 19
Who suggested that energy is radiated or absorbed in discrete packers called quanta.
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Max. Planck
Stefan
Lummer
Boltzmann
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Question # 20
Natural radioactivity was discovered in.
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1978
1896
1904
1906
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Question # 21
Who described an ideal heat engine in 1840
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Boyle
Saadi Carnot
Kelvin
Currie
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