Paper for Entry Test Preparation
Physics 2nd year Chapter No. 17
Total marks:- 160 Time
allowed 25 minutes
Note:- Fill
the appropriate answer of the following questions in the answer sheet. Double
filling and erasing is not allowed. Each question carries equal marks and for
each wrong answer minus one is awarded.
1) Zirconia is classified as:
a)
Ceramic soild b)
Ionic compound c) Metal d) Either (a)
or (B)
2) The transition form solid to liquid is actually
from:
a)
Order to disorder b)
Disorder to order c)
Oder to order d)
Disorder to disorder
3) The force which maintains the strict long range
order b/w atoms of a crystalline solid is the:
a)
Nuclear force b)
Cohesive force c)
Adhesive force d)
Coulomb force
4) Amorphous solids:
a)
Have a definite melting point b)
Are called glassy solids
c)
Have no definite melting point d)
Both (b) and (c)
5) The pattern of a crystalline solid is:
a)
One dimensional b) Two
dimensional c) Three
dimensional d) Either (a) or
(b)
6) A unit cell is the smallest basic structure which
is:
a)
One dimensional b) Two
dimensional c) Three
dimensional d) Four
dimensional
7) The whole structure obtained by the repetition of
unit cells is called:
a)
Crystal lattice b)
Amorphous solids c) Polymeric
solids d) Polystrene
8) Each atom in a metal crystal:
a)
Remains fixed b)
Vibrates about a fixed point
c)
Rotates about centre of the crystal d)
Moves randomly
9) The structure of polymeric solid is:
a)
An ordered structure b)
A disordered structure
c)
Intermediate b/w order and disorder d)
Any of these
10) Examples of crystalline solids are:
a)
Copper b)
NaCl c)
Zirconia d)
All of these
11) Polymers are the chemical combination of carbon
with:
a)
Metallic elements b) Non metallic elements c) Wholly with O, N, H d) All are true
12) Tick the one which is not a polymeric solid:
a)
Zirconia b)
Polythene c)
Nylon d)
Synthetic rubber
13) The ability of a body to return to its original
shape is called:
a)
Elasticity b)
Ductile c)
Stress d)
Strain
14) Strain is defined in terms of:
a)
Formation b)
Deformation c) Area d) Newtons
15) Which of the following quantity is
dimensionless:
a)
Strain b)
Stress c)
Modulus of elasticity d) Entropy
16) A stress which decreases the length along one
dimension is known as:
a)
Compressive stress b) Tensile
stress c) Linear
stress d) Non
linear strength
17) Change in length divided by original length is
called:
a)
Stress b)
Young’s modulus c) Strain d) Both (b)
and (c)
18) Bulk modulus is involved when the deformation
is:
a)
One dimensional b) Two
dimensional c) Three
dimensional d) Any of these
19) The value of young’s modulus is maximum for:
a)
Diamond b)
Copper c)
Ice d)
Mercury
20) Substances which undergo plastic deformation
until they break are called:
a)
Ductile b)
Brittle c)
Malleable d)
Hard
21) In a tensile test, a curve is plotted
automatically on X-Y chart recorder. This curve is called:
a)
Stress-strain curve b)
Stress-volume curve c) Force-shear
curve d) Force-elongation
diagram
22) Glass and high carbon steel are examples of:
a)
Malleable substances b) Ductile
substances c) Brittle
substances d) Hard
substances
23) Stress is directly proportional to strain within
the elastic limits, this statement is called:
a)
Boyle’s law b)
Newton’s law of cooling c) Hooke’s law d) Pascal’s law
24) Once the stress is increases than UTS, the
material falls into the region of:
a)
Elastic limit b)
Proportional limit c)
Fracture stress d)
Both (a) and (b)
25) The area method for finding strain energy is
useful for:
a)
Linear part of the force-extension graph b)
Elastic part
c)
Non linear part d)
Non elastic
26) The examples of conductors are:
a)
Copper b)
Diamond c)
Wood d)
Germanium
27) The electrons in the outer most shell of an atom
are called:
a)
Valence electrons b)
Conduction electrons c) Free
electrons d) Both (a)
and (c)
28) Conduction band:
a)
Is above the valence band b)
May be empty
c)
May be partially filled with electrons d) All of above
29) The outer most electrons in an atom of a semi
conductor is:
a)
Two in number b) Three
in number c) Four in
number d) Any of these
30) Those material in which valance and conduction
bands overlap each other are called:
a)
Insulator b)
Conductor c)
Semi conductor d) Any of
above
31) At zero Kelvin, the semi conductor acts as:
a)
Insulator b)
Semi conductor c)
Conductor d)
Either (b) or (c)
32) In semi conductor materials, the electrons are
bound in their respective outer most shells due to:
a)
Covalent bonds b) Ionic
bonds c) Metallic
bonds d) Both (b) and
(c)
33) An example of donor impurity is:
a)
Indium b)
Phosphorous c)
Gallium d)
Boron
34) Whenever a covalent bond is broken:
a)
An electron is created b) A hole
is created c) A photon is
created d) A proton is created
35) The super conductors which will be common in use
are at:
a)
Room temperature b) 163 K c) 125 K d) 77 K
36) An atom having resultant magnetic field:
a)
Behaves like a tiny magnet b)
Is called magnetic dipole
c)
Is called diamagnetic c)
Both (a) and (b)
37) Select the wrong statement:
a)
It is impossible to obtain an isolated north pole b) The north pole is merely one side of the
current loop
c)
The north pole and south pole can be separated d)
Non of all
38) An example of ferromagnetic substance is:
a)
Water b)
Cobalt c)
Bismuth d)
Antimony
39) The magnetic domains are of the size of:
a)
mm or less b) cm
or greater c) mm or
greater d) Meters
40) The temperature above which the iron becomes
paramagnetic from ferromagnetic is called:
a)
Curie temperature b)
Absolute temperature c) Kelvin
temperature d) Room
temperature
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