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DEPARTMENT OF PHYSICS (H&S)
Comprehensive Learning Material
Part A
Multiple Choice Questions with Answers
Sl.No
UNIT-1 PROPERTIES OF MATTER
The property by which a body returns to its original shape after
removal of the force is called
a) Plasticity
b) Elasticity
c) Ductility
d) Malleability
Answer: b
2 Which law is also called as the elasticity law?
a) Bernoulli’s law
b) Stress law
c) Hooke’s law
d) Poisson’s law
Answer: c
3 Which point on the stress strain curve occurs after the
proportionality limit?
a) Upper yield point
b) Lower yield point
c) Elastic limit
d) Ultimate point
Answer: c
What is the order of elastic modulus for Nickel alloys, Lead
alloys, Molybdenum alloys, alumina?
a) Pb < Mo < Ni < Al 2
O
Sub Code : PH
Sub Name : Engineering Physics- 1
Discipline of the Faculty : H&S
Year/ Sem: 2021 - I
st
Common to: BE, B.Tech
b) Ni < Pb < Mo < Al 2
O
c) Pb < Ni < Mo < Al 2
O
d) Pb < Ni < Al 2
O
< Mo
Answer: c
What is the unit of elastic modulus?
a) Mohs
b) GPa
c) Kg
d) N
Answer: b
6 Which of the following is the design criteria for beams?
(i) Strength in bending (ii) stiffness (iii)economy
a) ii only
b) i and iii
c) ii and iii
d) i, ii and iii
Answer: d
A beam section is provided on the basis of
(i) section modulus, (ii) deflection, (iii) shear
a) i, ii
b) ii, iii
c) i, iii
d) i, ii and iii
Answer: d
Specific gravity of water is
a) 0.
b) 1
c) 1.
d) 1.
Answer: b
Calculate the maximum deflection of a cantilever
beam with udl on entire span of 3m the intensity of
you udl be 25 kN/m. Take EI as 4000 kN/m
a) 0.052m
b) 0.063m
c) 0.076m
d) 0.09m
Answer: b
The inverse of specific weight of a fluid is
c) N-mm
d) N
Answer: a
What is the unit of elastic modulus?
e) Mohs
f) GPa
g) Kg
h) N
Answer: b
What property enhances with a decrease in E?
a) Flexibility
b) Stiffness
c) Hardness
d) UTS
Answer: a
18 1. What is a factor which controls the elastic
modulus?
a) Alloying
b) Heat treatment
c) Interatomic forces
d) Cold working
Answer: c
19 Stress should not exceed when in service.
a) Yield strength
b) Tensile strength
c) Fracture strength
d) Toughness
Answer: a
What is the elastic modulus of titanium alloys?
a) 150-170 GPa
b) 180-214 GPa
c) 80-130 GPa
d) 41-45 GPa
Answer: c
UNIT- 2 WAVES AND F IBER OPTICS
An object of mass 0.2kg executes simple harmonic motion along the
x-axis with a frequency of (25/π)Hz. At the position x = 0.04, the
object has kinetic energy of 0.5J and potential energy 0.4J. The
amplitude of oscillation is?
a) 6cm
b) 4cm
c) 8cm
d) 2cm
Answer: a
2 A spring of force constant 800N/m has an extension of 5cm. The
work done in extending it from 5cm to 15cm is?
a) 8J
b) 16J
c) 24J
d) 32J
Answer: a
3 The displacement of a simple harmonic motion doing
oscillation when kinetic energy
= potential energy (amplitude = 4cm) is?
a) 2√2cm
b) 2cm
c) 1/√2 cm
d) √2 cm
Answer: a
4 Which of the following functions represents a simple harmonic
oscillation?
a) sinωt-cosωt
b) sinωt+sin2ωt
c) sinωt-sin2ωt
d) sin
ωt
Answer: a
5 y 1
=4sin(ωt+kx), y 2
=-4cos(ωt+kx), the phase
difference is
a) π/
b) 3π/
c) π
d) Zero
Answer: b
6 The quantity which does not change, when sound enters from one
medium to another
a) Wavelength
b) Speed
c) Frequency
d) Velocity
d) 200 to 500 nm
Answer: a
13 Single mode fibers allow single mode propagation; the
cladding diameter must be at least
a) Twice the core diameter
b) Thrice the core diameter
c) Five times the core diameter
d) Ten times the core diameter
Answer: d
14 In single mode fibers, which is the most beneficial index profile?
a) Step index
b) Graded index
c) Step and graded index
d) Coaxial cable
Answer: b
Fluoride glass is used with
a) IR waves
b) UV rays
c) Normal light
d) All of the mentioned
Answer: a
The transfer of heat between two bodies in direct
contact is called
a) radiation
b) convection
c) conduction
d) none of the mentioned
Answer: c
OTDR stands for
a) Optical time domain reflectometer
b) Optical transfer data rate
c) Optical time data registers
d) None of the mentioned
Answer: a
18 Which of the following is not correct for fibre optic sensors?
a) Immune to electro magnetic interference
b) Immune to radiation hazard
c) Can be used in harsh environments
d) None of the mentioned
Answer: d
19 Fiber mostly suited in single-wavelength transmission in O-band
is?
a) Low-water-peak non dispersion-shifted fibers
b) Standard single mode fibers
c) Low minimized fibers
d) Non-zero-dispersion-shifted fibers
Answer: b
20 Standard single mode fibers (SSMF) are utilized
mainly for operation in
a) C-band
b) L-band
c) O-band
d) C-band and L-band
Answer: c
Unit-III Thermal Physics
Heat and work are
a) path functions
b) inexact differentials
c) depend upon the path followed
d) all of the mentioned
Answer: d
Latent heat is taken at
a) constant temperature
b) constant pressure
c) both of the mentioned
d) none of the mentioned
Answer: c
A faulty thermometer has its fixed points marked as
5° and 95°. The temperature of a body as measured
by the faulty thermometer is 59°. Find the correct
temperature of the body on a Celsius scale.
a) 60°C
b) 40°C
c) 20°C
d) 0°C
Answer: a
4 Calorie is defined as the amount of heat required to raise the
temperature of 1g of water by 1°C and it is defined under which of
the following conditions?
a) From 14.5°C to 15.5°C at 760mm of Hg
b) From 98.5°C to 99.5°C at 760mm of Hg
a) 9000 Å
b) 6000 Å
c) 2000 Å
d) 8000 Å
Answer: b
Identify the given joint in Concrete Structures.
a) Horizontal construction joint
b) Vertical construction joint
c) Expansion construction joint
d) Water tank joint
Answer: a
Identify the given joint in Concrete Structures.
a) Expansion joint
b) Contraction Joint
c) Water tank joint
d) Vertical construction joint
Answer: c
For water tanks and other structure which store water, the strips
of copper, aluminium, galvanized iron or other collision resistance
material, known as the
a) Joints
b) Waterstops
c) Dowels
d) Fillers
Answer: b
13 The expansion and contraction joints generally consist of some
elastic material, known as which should be compressible,
rigid, cellular and Resilient.
a) Keys
b) Joint filler
c) Keys
d) Fillers
Answer: b
14 The are provided in expansion and contraction joints to
transfer the load.
a) Dowels
b) Fillers
c) Joint filler
d) Waterbars
Answer: a
Measurement of elevated temperatures is defined as
a) Thermometry
b) Pyrometry
c) Metallography
d) Radiography
Answer: b
What temperature does the dark red color generally deal with?
a) 950 F
b) 1150 F
c) 1175 F
d) 1300 F
Answer: b
Why is invar used in bimetallic strips?
a) Low density
b) Low coefficient of expansion
c) High-temperature resistance
d) High abrasion resistance
Answer: b
Bimetallic strips are employed in
thermometers.
a) Vapor-pressure
b) Liquid-expansion
c) Metal-expansion
d) Resistance
a) T 1
> T
> T
b) T 3
> T
> T
c) T 3
> T
> T
d) T 2
> T
> T
Answer: b
5 The energy emitted by a black surface should not
vary in accordance with
a) Wavelength
b) Temperature
c) Surface characteristics
d) Time
Answer: d
Likewise the amount of emitted radiation is strongly influenced by
the wavelength even if temperature of the body is
a) Constant
b) Increasing
c) Decreasing
d) It is not related with temperature
Answer: a
7 The Planck’s constant h has the dimensions equal to
a) M L
T
b) M L T
c) M L T
d) M L T
Answer: a
8 Rayleigh-Jean’s law holds good for which of the
following?
a) Shorter wavelength
b) Longer wavelength
c) High temperature
d) High energy
Answer: b
Which of the following is the characteristic of a black body?
a) A perfect absorber but an imperfect radiator
b) A perfect radiator but an imperfect absorber
c) A perfect radiator and a perfect absorber
d) A perfect conductor
Answer: c
Which of the following does not affect the photon?
a) Magnetic or electric field
b) Light waves
c) Gravity
d) Current
Answer: a
What is Compton shift?
a) Shift in frequency
b) Shift in charges
c) Shift in radiation
d) Shift in wavelength
Answer: d
12 Which of the following is associated with an electron
microscope?
a) Matter waves
b) Electrical waves
c) Magnetic waves
d) Electromagnetic waves
Answer: a
13 A radio station broadcasts its programme at 219.
metre wavelength. Determine the frequency of radio
waves if velocity of radio waves is 3×
m/s.
a) 7.31×
Hz
b) 1.954×
Hz
c) 1.368×
Hz
d) 6.579×
Hz
Answer: c
d) 4
Answer: b
19 The line at which the tunnel wall breaks from
sloping outward can be given as
a) Spring line
b) Oval line
c) Centre line
d) Middle line
Answer: a
20 Which among the following helps us in getting a three-
dimensional picture of the specimen?
a) Transmission Electron Microscope
b) Scanning Electron Microscope
c) Compound Microscope
d) Simple Microscope
Answer: b
Unit-V CRYSTAL PHYSICS
Which of the following properties is generally exhibited by
amorphous solids?
a) Anisotropy
b) Glass-transition
c) Equal strength of all bonds
d) All of the mentioned
Answer: b
2 Metal glasses differ from their crystalline
counterparts in many ways. Chief application(s) of
metal glasses include(s):
a) Bullet-proof glasses
b) Power transformers
c) Conducting wires
d) All of the mentioned
Answer: b
3 In the following diagram, what is the direction
cosine of the line EB?
a) [1 11]
b) [111]
c) [1 1 1]
d) [1 0 0]
View answer
Answer: a
Miller indices of the hatched plane in the following figure are:
a) (2 3 1)
b) (3 2 1)
c) (3 2 0)
d) (1 1 1)
View answer
Answer: a
5 Which of the following is a property of Miller
Answer: d
10 In Bragg’s equation [nλ = 2.d.sinθ], θ is the angle between:
a) specimen surface and incident rays
b) normal to specimen surface and incident rays
c) parallel lattice surfaces d distance apart and incident rays
d) normal to parallel lattice surfaces d distance apart and
incident rays
View answer
Answer: c
Lead is a metallic crystal having a
structure.
a) FCC
b) BCC
c) HCP
d) TCP
Answer: a
12 Which of the following has a HCP crystal structure?
a) W
b) Mo
c) Cr
d) Zr
Answer: d
Amorphous solids have structure.
a) Regular
b) Linear
c) Irregular
d) Dendritic
Answer: c
The crystal lattice has a
arrangement.
a) One-dimensional
b) Two-dimensional
c) Three-dimensional
d) Four-dimensional
Answer: c
The smallest portion of the lattice is known as
a) Lattice structure
b) Lattice point
c) Bravais crystal
d) Unit cell
Answer: d
Bravais lattice consists of
space lattices.
a) Eleven
b) Twelve
c) Thirteen
d) Fourteen
Answer: d
17 The interracial angles of a hexagonal crystal
system are given by
a) α = β = ϒ = 90o
b) α = β = 90o ϒ = 120o
c) α = β = ϒ ≠ 90o
d) α ≠ β ≠ ϒ ≠ 90o
Answer: b
Which of the following is a point defect in crystals?
a) Edge dislocation
b) Interstitialcies
c) Grain boundaries
d) Cracks
Answer: b
19 Which defect does the following figure depict?
a) Vacancy defect
b) Schottky defect
c) Frankel defect
d) Interstitial defect
Answer: b
What are two-dimensional defects?
