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Physics ECAT Pre Engineering Chapter 21 Nuclear Physics Physics Online Test MCQs With Answers
Question # 1
The isotope/s of hydrogen is /are:
Choose an answer
Protium
Deuterium
Tritium
Both (A) and (B)
All of these
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Question # 2
The mass of the nucleus is always less than the total man of the protons and neutron that make up the nucleus. The difference of the two masses is called
Choose an answer
nuclear fission
nuclear fusion
man defect
radioactivity
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Question # 3
The number of isotopes of hydrogen are
Choose an answer
2
1
3
4
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Question # 4
Neon gas have three isotopes whose atomic numbers are
Choose an answer
20, 24 , 23
20, 21 , 22
20, 19 , 21
none of these
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Question # 5
The amount of energy equivalent to 1 a.m.u is
Choose an answer
9.315 Mev
93.15 Mev
931.5 Mev
2.22 Mev
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Question # 6
The range of particle depends upon the factor
Choose an answer
charge, mass and energy of particle
density of medium
ionization potential of the atoms
all the above
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Question # 7
The half life of radioactive substances depends upon
Choose an answer
amount of substance
energy of substance
state of substance
temperature of substance
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Question # 8
Beta particles are
Choose an answer
hydrogen nuclei
helium nuclei
electrons
photons
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Question # 9
If a nucleus emits an alpha particle, its mass number decreases by 4 while charge number decreased by
Choose an answer
-4
4
2
1
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Question # 10
Rutherford performed an experiment on nuclear reactions in:
Choose an answer
1718 A.D
1818 A.D
1918 A.D
2001 A.D.
1701 A.D.
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Question # 11
β-particles are easily deflected by collisions than heavy
Choose an answer
α-particles
β-particles
γ-particles
none of these
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Question # 12
The nuclei of an element having the same charge number but different mass numbers are called:
Choose an answer
Isobars
Isotopes
Isomers
Isobaric
Isothermal
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Question # 13
Different radioactive material have
Choose an answer
same half lives
different half lives
same mean lives
same total lives
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Question # 14
Three quarks make:
Choose an answer
An electron
A meson
A baryon
A photon
None of these
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Question # 15
The distance travelled by
α-particle in a medium before coming to rest, is called
Choose an answer
range of
γ-particle
range of neutrons
range of particle
none of these
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