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Physics ECAT Pre Engineering Chapter 17 Physics of Solid Online Test MCQs With Answers
Question # 1
The substances which break just after the elastic limit is reached, are known as
Choose an answer
brittle substances
ductile substances
plastic substances
elastic substances
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Question # 2
The bonding between the semi-conductor materials is
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covalent
ionic
either of them
none of them
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Question # 3
Whenever a covalent bond is broken in an intrinsic semi-conductor
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hole is created
an electron is created
an electron-hole pair is generated
all of them
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Question # 4
Every crystalline solid has
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definite melting point
different melting points
may or may not be definite
none of them
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Question # 5
The valence band of an atom in a solid
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is always empty
may or may not be empty
can never be empty
none of them
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Question # 6
The pattern of crystalline solid is:
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One dimesional
Two dimensional
Three dimensional
Either (A) or (B)
None of these
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Question # 7
The band above the valence band is called
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high energy band
conduction band
empty band
none of them
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Question # 8
Under the elastic region, the deformation produced in the material, the deformation produced in the material will be
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permanent
temporary
either of them
none of them
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Question # 9
Within each domain, the magnetic field of all the spinning electrons are
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parallel
antiparallel
perpendicular
all of them
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Question # 10
When a silicon crystal is doped with a pentavalent element, such an extrinsic semi-conductor is called
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p-type semi-conductor
n-type semi-conductor
either of them
none of them
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Question # 11
A structure of polymeric solid is:
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An ordered structure
A disordered structure
Intermediate between order and disorder
Any of these
None of these
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Question # 12
In the phenomenon of hysteresis
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magnetism leads the magnetising current
magnetism lags behind the magnetising current
meganetism goes along the magnetising current
none of them
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Question # 13
When small number of atoms from some other suitable element is added to the semi-conductor material, then this process is known as
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impurification
adding
doping
extrinsivity
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Question # 14
The greatest stress that a material can endure without losing the proportionality between stress and strain is called
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plastic line
breaking point
proportional limit
none of them
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Question # 15
Glass and high carbon steel are the examples of
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brittle substances
ductile substances
plastic substances
elastic substances
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Question # 16
Ferromagnetic substances lose their magnetism when heated above a certain temperature, known as
Choose an answer
critical temperature
curie temperature
high temperature
fixed temperature
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