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Physics ECAT Pre Engineering Chapter 21 Nuclear Physics Physics Online Test MCQs With Answers
Question # 1
A particle having the mass of electron and charge of a proton is called a
Choose an answer
photon
position
antiproton
antineutrino
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Question # 2
β-particles are easily deflected by collisions than heavy
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α-particles
β-particles
γ-particles
none of these
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Question # 3
Neutrons are
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positive charge
negatively charged
massless
neutral
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Question # 4
The range of particle depends upon the factor
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charge, mass and energy of particle
density of medium
ionization potential of the atoms
all the above
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Question # 5
A mass difference of 0.0012 u is equivalent to and energy of:
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0.5 Me V
1.13 MeV
5.13 MeV
1.13 keV
1.13 eV
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Question # 6
A curie represents a very strong source of
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α-particle
β-particle
γ-particle
none of these
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Question # 7
The half life of radioactive substances depends upon
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amount of substance
energy of substance
state of substance
temperature of substance
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Question # 8
The missing mass which is converted to energy in the formation of nucleus, is called
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packing fraction
mass defect
binding energy
none of these
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Question # 9
For an atom having atomic number Z and atomic weight A, the number of electron in an atoms
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A - Z
A + Z
Z
A
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Question # 10
The nuclei of an element having the same charge number but different mass numbers are called:
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Isobars
Isotopes
Isomers
Isobaric
Isothermal
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Question # 11
The counter, which also provides the power to the G.M. tube is called:
Choose an answer
Thin mica window
thin glass window
Airy window
Wooden window
None of these
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Question # 12
A mass spectrograph sort out
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molecules
atoms
elements
isotopes
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Question # 13
Radioactivity
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is exhibited more by semiconductors in general
in exhibited more by the element when they are coupled
with other radioactive elements by a covalent bond
is an atomic property of radioactive elements
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Question # 14
When certain nucleus emits aβ-particles, is mass number:
Choose an answer
Remain same
Increases by one
Decreases by one
Decreases by four
None of these
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Question # 15
γ-rays behave like a particle because they explain the
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Compton effect
Photoelectric effect
Pair-production
all the above
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Question # 16
The chemical behaviour of an atom is determined by
Choose an answer
binding energy
atomic number
mass number
number of isotopes
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Question # 17
For Protium, the mass defect is:
Choose an answer
Infinite
Zero
Very large
A few grams
None of these
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