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Online Tests
Physics ECAT Pre Engineering Chapter 21 Nuclear Physics Physics Online Test MCQs With Answers
Question # 1
Which of the following material has smaller has life
Choose an answer
uranium
polonium
radium
radian
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Question # 2
Curie is a unit of
Choose an answer
reluctance
resistivity
binding energy
radioactivity
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Question # 3
Neutron was suggested to be in the nucleus by:
Choose an answer
Rutherford in 1920
Bohar in 1913
Dirac in 1928
Anderson in 1932
None of these
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Question # 4
A pair of quark and antiquark makes a:
Choose an answer
Meson
Baryon
Proton
Neutron
None of these
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Question # 5
When radioactive nucleus emits a
β-particle, the proton-neutron ratio
Choose an answer
decrease
increase
same
none of these
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Question # 6
Which are not the elementary particles?
Choose an answer
Photons
Leptons
Hadrons
Quarks
None of these
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Question # 7
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 # 8
The most abundant isotope of neon is
Choose an answer
neon-20
neon-21
neon-22
neon-23
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Question # 9
According to Rutherford atomic model, the positive charge in an atom
Choose an answer
is concentrated at its centre
is in the form of positive electron at same distance from its centre
is spread uniformly through its volume
none of these
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Question # 10
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 # 11
The half life of uranium-238 is
Choose an answer
6.2 x 10
9
years
4.5 x 10
9
days
4.5 x 10
9
years
1.3 x 10
6
years
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Question # 12
Fraction of the decaying atoms per unit time is called
Choose an answer
decay atom
decay element
decay constant
decay
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Question # 13
The penetration power of
β-particle is
Choose an answer
zero
less than
α-particle
equal to
α-particle
greater than
α-particle
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Question # 14
Marie curie and Pierre curie discovered:
Choose an answer
Uranium
Polonium
Radium
Both (A) and (C)
Plutonium
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Question # 15
Electrons are
Choose an answer
positive charged
negatively charged
massless
neutral
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Question # 16
Alfa particles are
Choose an answer
hydrogen nuclei
helium nuclei
electrons
photons
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Question # 17
Hydrogen atom with only one proton in its nucleus, and one electron in its orbit is called
Choose an answer
deuteron
deterium
protium
tritium
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