Home General Knowledge multiple choice questions and answers on physics
Questions
1 In which temperature the density of water is maximum ?
A 1000C
B 00C
C 40C
D 2730C
Answer: Option [C]
2 Loudness of sound depends upon ________ of the sound wave.
A Frequency
B Wavelength
C Amplitude
D Pitch
Answer: Option [C]
3 The reason behind decrease in the boiling point of water at higher altitudes is :
A high temperature
B low temperature
C high atmospheric pressure
D low atmospheric pressure
Answer: Option [D]
4 The moment of inertia of a body does not depend upon it's :
A axis of rotation
B angular velocity
C form of mass
D position of ais of rotation
Answer: Option [B]
5 Which method can be applied to determine purity of a metal ?
A Boyle's law
B Pascal's law
C Archimedes principle
D Newton's law
Answer: Option [C]
6 Which of the following is related to threshold frequency ?
A Photo current decreases with voltage
B Photo electric emission is not possible
C Photo current increases with voltage
D Photo current is constant
Answer: Option [B]
7 The instrument used to study the laws of vibrating string is :
A Hydrometer
B Hygrometer
C Sonometer
D Electrometer
Answer: Option [C]
8 Which device is used to measure the wavelength of X-rays ?
A Framing square
B Spectrometer
C Manometer
D SWR meter
Answer: Option [B]
9 The hydraulic press depends upon :
A Coulomb's law
B Pascal's principle
C Boyle's law
D Bernouli's principle
Answer: Option [B]
10 The Newton's first law is also referred to as :
A Law of inertia
B Law of friction
C Law of moments
D Law of motion
Answer: Option [A]
11 Which instrument is used to measure atomospheric humidity ?
A Tintometer
B Tacheometer
C Hygrometer
D Thermometer
Answer: Option [C]
12 Ocean depth can be measured by :
A Fathometer
B Audiometer
C Actinometer
D Barkometer
Answer: Option [A]
13 Which device is used to measure the intensity of light ?
A Load cell
B Lux meter
C Heliometer
D Inkometer
Answer: Option [B]
14 Specific gravity of milk can be measured by :
A elaeometer
B dosimeter
C lactometer
D odometer
Answer: Option [C]
15 A transformer works with :
A Direct current
B Alternating current
C Both AC & DC
D None of these
Answer: Option [B]
16 The unit of Planck's constant is :
A JS
B J/S
C JS2
D None of these
Answer: Option [A]
17 The SI unit of electric charge is :
A ampere
B coulomb
C ohm
D kelvin
Answer: Option [B]
18 Which instrument is used to convert heat into electrical energy ?
A Ammeter
B Hydrometer
C Thermoelectric generator
D Voltmeter
Answer: Option [C]
19 The colours of stars depend on :
A distance
B temperature
C atmospheric pressure
D pollutants of air
Answer: Option [B]
20 How stationary waves are formed ?
A A transverse wave superposing a longitudinal wave
B Two waves of the same speed superposing
C Two waves of same frequency travelling in the same direction
D Two waves of same frequency travelling in the opposite direction
Answer: Option [D]
21 In a filament type light bulb most of electric power consumed appears as :
A LED light
B Infra red rays
C Ultra violet rays
D Fluorescent light
Answer: Option [B]
22 The purpose of using Diode is :
A amplification
B purification
C modulation
D demodulation
Answer: Option [B]
23 What is the minimum escape velocity of rocket to be launched into space ?
A 4KM/Sec
B 8KM/Sec
C 11KM/Sec
D 13KM/Sec
Answer: Option [C]
24 Who invented Electron Microscope ?
A Galileo
B Knoll and Ruska
C Robert Koch
D Leeuwenhook
Answer: Option [B]
25 What is the wavelength of visible spectrum ?
A 1300A0 - 3000A0
B 3900A0 - 7600A0
C 7800A0 - 8000A0
D 8500A0 - 9800A0
Answer: Option [B]
26 Decibel unit is used to measure :
A speed of light
B intensity of heat
C intensity of sound
D radio wave frequency
Answer: Option [C]
27 Which atmospheric layer helps in radio transmission ?
A Ozonosphere
B Ionosphere
C Stratosphere
D Mesosphere
Answer: Option [B]
28 Kilowatt-hour(KWh) unit is used to measure :
A Power
B Energy
C Electric charge
D Electric current
Answer: Option [B]
29 Golden view of sea shell is due to :
A Diffraction
B Reflection
C Refraction
D Polarization
Answer: Option [D]
30 The 'Greenhouse effect' is mainly due to increase in atmospheric :
A Ozone
B Nitrogen
C Carbon dioxide
D Carbon monoxide
Answer: Option [C]
31 Which instrument is used to measure blood pressure ?
A sphygmomanometer
B thermometer
C hygrometer
D barometer
Answer: Option [A]
32 Which device is used to convert solar energy into electricity ?
A Danial cell
B Solar cell or photovoltatic cell
C Electrochemical cell
D Vectorscope
Answer: Option [B]
33 According to special theory of relativity the mass of a particle :
A remains constant with increase in velocity
B increase with increase in velocity with respect to an observer
C decreases with increase in velocity
D decreases with decrease in velocity
Answer: Option [B]
34 The field produced around a current carrying conductor is :
A electric field
B electro-magnetic field
C magnetic field
D electrostatic field
Answer: Option [C]
35 Cause of rainbow formation is :
A refraction, reflection and dispersion
B refraction and dispersion
C refraction and scattering
D diffraction and reflection
Answer: Option [A]
36 The unit used to measure the distance between stars is :
A Galactic unit
B Light year
C Steller mile
D Cosmic kilometre
Answer: Option [B]
37 Tesla is a standard unit of which of the following ?
A Magnetic flux density
B Magnetic induction
C Magnetic field
D Magnetic moment
Answer: Option [A]
38 Which type of mirror is used in the head lights of vehicles ?
A Plain mirror
B Concave mirror
C Convex mirror
D Parabolic mirror
Answer: Option [B]
39 Heavy water is used in nuclear reactor as :
A coolant
B moderator
C fuel
D atomic smasher
Answer: Option [B]
40 Which metals are used in fuse wire :
A an alloy of tin and copper
B an alloy of tin and lead
C an alloy of tin and aluminium
D an alloy of nickel and chromium
Answer: Option [B]
41 Which device is used to convert sound energy into electrical energy ?
A Solar cell
B Gramophone
C Microphone
D Loudspeaker
Answer: Option [C]
42 The device dynamo is used to convert :
A Electrical energy into mechanical energy
B Electrical energy into heat energy
C Mechanical energy into electrical energy
D None of these
Answer: Option [C]
43 Ball pen functions on the principle of :
A Lenz's law
B Surface tension
C Doppler effect
D Gravitional force
Answer: Option [B]
44 Because of _______ red light is used for signals ?
A High frequency
B High intensity
C Long wavelength
D High refraction
Answer: Option [C]
45 Which of the following light rays is used for eliminating bacteria ?
A Alpha rays
B Infrared rays
C Ultra-violet radiation
D Microwave radiation
Answer: Option [C]
46 Which of the following principles is associated with Optical fibre ?
A Scattering
B Interference
C Total internal reflection
D Refraction
Answer: Option [C]
47 Which type of coal produces the greatest energy ?
A Coal
B Anthracite
C Lignite
D Bituminous
Answer: Option [B]
48 Ultra violet radiations of the Sun do not reach the earth because of the layer of :
A Ozone
B Carbon di-oxide
C Nitrogen
D Ammonia
Answer: Option [A]
49 Which metal is used for the manufacturing of heating elements used in electric iron ?
A Chromium
B Nichrome
C Lead
D Nickel
Answer: Option [B]
50 Which device is used to measure the speed of wind ?
A Altimeter
B Anemometer
C Calorimeter
D Chronometer
Answer: Option [B]
51 What is found in frequency modulation ?
A fixed frequency
B fixed dimension
C change in dimension only
D change in frequency and dimension
Answer: Option [A]
52 Colour of light is related to it's :
A Frequency
B Velocity
C Amplitude
D None of the above
Answer: Option [A]
53 What principle / law explains the working of hydraulic brakes in automobiles ?
A Poiseuille’s principle
B Pascal’s law
C Bernoullis law
D archimede’s principle
Answer: Option [B]
54 Which one of the following is used for sun glasses ?
A Crooks glass
B Pyrex glass
C Crystal glass
D None of the above
Answer: Option [A]
55 Good conductor of electricity is
A kerosene
B paper
C dry air
D graphite
Answer: Option [D]
56 Longitudinal waves cannot travel through
A Liquid
B fixed dimension
C Vacuum
D Gas
Answer: Option [C]
57 The fourth state of matter is known as
A Vapour
B Plasma
C Gas
D None of the above
Answer: Option [B]
58 Which of the following parts of sunlight makes the solar cooker hot ?
A Infra Red
B Ultra violet
C Cosmic rays
D Red light
Answer: Option [A]
59 ‘Cryogenics’ is a science dealing with
A growth of crystals
B high temperatures
C low temperatures
D None of the above
Answer: Option [C]
60 Spectacles used for viewing 3D films have
A Polaroids
B Concave lens
C Convex lens
D Bifocal lens
Answer: Option [A]
61 The weakest of all fundamental forces is
A Nuclear force
B Magnetic force
C Electrostatic force
D Gravitational force
Answer: Option [D]
62 1 Micron is equal to
A 10-6
B 10-8
C 10-12
D 10-14
Answer: Option [A]
63 The unit of noise polution (level) is
A decimal
B decibel
C ppm
D None of the above
Answer: Option [B]
64 The pitch of sound depends on its
A amplitude
B velocity
C frequency
D All of the above
Answer: Option [C]
65 Solar energy is due to
A chemical reaction
B combustion reaction
C fission reaction
D fusion reaction
Answer: Option [D]
66 A body absorbs heat most if it is
A black and smooth
B black and rough
C white and black
D white and rough
Answer: Option [B]
67 The slope of a velocity-time graph represents
A distance
B acceleration
C speed
D All of the above
Answer: Option [B]
68 A rear-view mirror for driving is
A convex
B concave
C inverted
D None of the above
Answer: Option [A]
69 The audio signals of TV are
A unmodulated
B velocity modulated
C Amlitude modulated
D frequency modulated
Answer: Option [D]
70 Red is used as an emergency or danger signal as
A it is scattered
B it has very high energy
C its wavelength is the longest
D None of the above
Answer: Option [C]
71 Which colour of light shows maximum deviation when passed through a prism ?
A Yellow
B Violet
C Green
D Red
Answer: Option [B]
72 Pure water is poor conductor of electricity because it is
A a non-polar solvent
B a very good solvent
C not volatile
D feebly ionized
Answer: Option [D]
73 The filament of electric bulb is made up of :
A Copper
B Lead
C Tungsten
D None of the above
Answer: Option [C]
74 The device which transfer the signal from low resistance region to high resistance region
A transistor
B capacitor
C inductor
D All of the above
Answer: Option [A]
75 When a detergent is added to pure water, its surface tension
A increases
B decreases
C becomes infinite
D remains constant
Answer: Option [B]
76 ‘Therm’ is the unit of
A speed
B light
C power
D heat
Answer: Option [D]
77 A pond water appears less deep due to
A polarisation
B refraction
C diffraction
D reflection
Answer: Option [B]
78 Heat from the Sun reaches the Earth by
A radiation
B convection
C reflection
D conduction
Answer: Option [A]
79 The mass of a star is two times the mass of the Sun. How it will come to an end
A White Dwarf
B Black hole
C Neutron Star
D None of the above
Answer: Option [C]
80 A boat will submerge when it displaces water equal to its own
A weight
B surface area
C volume
D none of the above
Answer: Option [A]
81 Where are mesons found ?
A Cosmic rays
B Gamma rays
C X-ray
D Ultra violet
Answer: Option [A]
82 Tungsten is used for the manufacture of the filament of an electric bulb, because
A It is economical
B It is malleable
C It is a good conductor
D It has a very high melting point
Answer: Option [D]
83 The term ‘Isoneph’ indicates the lines of equal
A salinity
B pressure
C cloudiness
D none of the above
Answer: Option [C]
84 The period of revolution of a geostationary satellite is
A 24 hours
B 24 days
C 365 days
D changing continuously
Answer: Option [A]
85 The time period of a seconds pendulum is
A 1 second
B 2 seconds
C 3 seconds
D 4 seconds
Answer: Option [B]
86 Lens is made up of
A Ordinary glass
B Pyrex glass
C Cobalt glass
D Flint glass
Answer: Option [D]
87 Among the following materials sound travels fastest in
A vacuum
B steel
C water
D air
Answer: Option [B]
88 Kilowatt-hour is the unit of
A light
B energy
C force
D power
Answer: Option [B]
89 The head mirror used by ENT doctors is
A convex
B concave
C plane
D plano-convex
Answer: Option [B]
90 The word ‘insolation’ means
A insoluble matters
B matters which insulate
C incoming solar radiation
D none of the above
Answer: Option [C]
91 A NOT gate can be implemented by
A a single transistor
B a single resistor
C a single diode
D two diode
Answer: Option [A]
92 The term reactor referred to in wastewater treatment is
A Clarifier
B Aeration tank
C Vassel
D Setting tank
Answer: Option [B]
93 The earth is a
A non-absorber of heat
B good reflector of heat
C bad absorber and bad radiator of heat
D good absorber and good radiator of heat
Answer: Option [C]
94 Which of the following radiations has the least wavelenght
A g-ray
B X-ray
C a-ray
D b-ray
Answer: Option [A]
95 A light year is a unit of
A distance
B speed of light
C intensity of light
D none of the above
Answer: Option [A]
96 Persons suffering from myopia are advised to use
A plano-concave lens
B convex lens
C concave lens
D plano-convex lens
Answer: Option [C]
97 The device used for locating submerged objects under sea is
A radar
B sonar
C laser
D all of the above
Answer: Option [B]
98 A device which is used to limit the current in an electrical circuit is called a
A fuse
B grid
C conductor
D none of the above
Answer: Option [A]
99 A transformer
A converts DC to AC
B converts AC voltage to DC voltage
C converts electrical energy into mechanical energy
D is used to decrease or increase AC voltage
Answer: Option [D]
100 Eclipses occur due to which optical phenomena ?
A refraction
B diffraction
C reflection
D rectilinear propagation
Answer: Option [C]
101 The material used in the fabrication of a transistor is
A Silicon
B Silver
C Aluminium
D Copper
Answer: Option [A]
102 For a person having hypermetropia, the near point is
A 25 cm
B 50 cm
C greater than 35 cm
D infinity
Answer: Option [B]
103 Angle of friction and angle of repose are
A proportional to each other
B not equal to each other
C equal to each other
D none of the above
Answer: Option [C]
104 Intensity of gravitational field of earth is maximum at
A Surface
B Poles
C Equator
D Centre of earth
Answer: Option [B]
105 The sound production by a bat is
A subsonic
B audible
C infrasonic
D ultrasonic
Answer: Option [D]
106 When a person sitting on a swing stands up the swing, the frequency of oscillation
A increases
B decreases
C becomes infinite
D does not change
Answer: Option [A]
107 Forged documents are detected by
A beta rays
B infra-red rays
C ultraviolet rays
D gamma rays
Answer: Option [C]
108 When light passes from air to glass its speed
A decreases
B increases and does not depend upon the density of glass
C speed increases and depends upon the density of the glass
D does not change
Answer: Option [A]
109 A green leaf when seen in red light would appear to be
A white
B cyan
C magenta
D black
Answer: Option [D]
110 The wave theory of light cannot explain the phenomenon of
A scattering
B polarisation
C reflection
D photoelectric effect
Answer: Option [D]
Questions
1 In which temperature the density of water is maximum ?
A 1000C
B 00C
C 40C
D 2730C
Answer: Option [C]
2 Loudness of sound depends upon ________ of the sound wave.
A Frequency
B Wavelength
C Amplitude
D Pitch
Answer: Option [C]
3 The reason behind decrease in the boiling point of water at higher altitudes is :
A high temperature
B low temperature
C high atmospheric pressure
D low atmospheric pressure
Answer: Option [D]
4 The moment of inertia of a body does not depend upon it's :
A axis of rotation
B angular velocity
C form of mass
D position of ais of rotation
Answer: Option [B]
5 Which method can be applied to determine purity of a metal ?
A Boyle's law
B Pascal's law
C Archimedes principle
D Newton's law
Answer: Option [C]
6 Which of the following is related to threshold frequency ?
A Photo current decreases with voltage
B Photo electric emission is not possible
C Photo current increases with voltage
D Photo current is constant
Answer: Option [B]
7 The instrument used to study the laws of vibrating string is :
A Hydrometer
B Hygrometer
C Sonometer
D Electrometer
Answer: Option [C]
8 Which device is used to measure the wavelength of X-rays ?
A Framing square
B Spectrometer
C Manometer
D SWR meter
Answer: Option [B]
9 The hydraulic press depends upon :
A Coulomb's law
B Pascal's principle
C Boyle's law
D Bernouli's principle
Answer: Option [B]
10 The Newton's first law is also referred to as :
A Law of inertia
B Law of friction
C Law of moments
D Law of motion
Answer: Option [A]
11 Which instrument is used to measure atomospheric humidity ?
A Tintometer
B Tacheometer
C Hygrometer
D Thermometer
Answer: Option [C]
12 Ocean depth can be measured by :
A Fathometer
B Audiometer
C Actinometer
D Barkometer
Answer: Option [A]
13 Which device is used to measure the intensity of light ?
A Load cell
B Lux meter
C Heliometer
D Inkometer
Answer: Option [B]
14 Specific gravity of milk can be measured by :
A elaeometer
B dosimeter
C lactometer
D odometer
Answer: Option [C]
15 A transformer works with :
A Direct current
B Alternating current
C Both AC & DC
D None of these
Answer: Option [B]
16 The unit of Planck's constant is :
A JS
B J/S
C JS2
D None of these
Answer: Option [A]
17 The SI unit of electric charge is :
A ampere
B coulomb
C ohm
D kelvin
Answer: Option [B]
18 Which instrument is used to convert heat into electrical energy ?
A Ammeter
B Hydrometer
C Thermoelectric generator
D Voltmeter
Answer: Option [C]
19 The colours of stars depend on :
A distance
B temperature
C atmospheric pressure
D pollutants of air
Answer: Option [B]
20 How stationary waves are formed ?
A A transverse wave superposing a longitudinal wave
B Two waves of the same speed superposing
C Two waves of same frequency travelling in the same direction
D Two waves of same frequency travelling in the opposite direction
Answer: Option [D]
21 In a filament type light bulb most of electric power consumed appears as :
A LED light
B Infra red rays
C Ultra violet rays
D Fluorescent light
Answer: Option [B]
22 The purpose of using Diode is :
A amplification
B purification
C modulation
D demodulation
Answer: Option [B]
23 What is the minimum escape velocity of rocket to be launched into space ?
A 4KM/Sec
B 8KM/Sec
C 11KM/Sec
D 13KM/Sec
Answer: Option [C]
24 Who invented Electron Microscope ?
A Galileo
B Knoll and Ruska
C Robert Koch
D Leeuwenhook
Answer: Option [B]
25 What is the wavelength of visible spectrum ?
A 1300A0 - 3000A0
B 3900A0 - 7600A0
C 7800A0 - 8000A0
D 8500A0 - 9800A0
Answer: Option [B]
26 Decibel unit is used to measure :
A speed of light
B intensity of heat
C intensity of sound
D radio wave frequency
Answer: Option [C]
27 Which atmospheric layer helps in radio transmission ?
A Ozonosphere
B Ionosphere
C Stratosphere
D Mesosphere
Answer: Option [B]
28 Kilowatt-hour(KWh) unit is used to measure :
A Power
B Energy
C Electric charge
D Electric current
Answer: Option [B]
29 Golden view of sea shell is due to :
A Diffraction
B Reflection
C Refraction
D Polarization
Answer: Option [D]
30 The 'Greenhouse effect' is mainly due to increase in atmospheric :
A Ozone
B Nitrogen
C Carbon dioxide
D Carbon monoxide
Answer: Option [C]
31 Which instrument is used to measure blood pressure ?
A sphygmomanometer
B thermometer
C hygrometer
D barometer
Answer: Option [A]
32 Which device is used to convert solar energy into electricity ?
A Danial cell
B Solar cell or photovoltatic cell
C Electrochemical cell
D Vectorscope
Answer: Option [B]
33 According to special theory of relativity the mass of a particle :
A remains constant with increase in velocity
B increase with increase in velocity with respect to an observer
C decreases with increase in velocity
D decreases with decrease in velocity
Answer: Option [B]
34 The field produced around a current carrying conductor is :
A electric field
B electro-magnetic field
C magnetic field
D electrostatic field
Answer: Option [C]
35 Cause of rainbow formation is :
A refraction, reflection and dispersion
B refraction and dispersion
C refraction and scattering
D diffraction and reflection
Answer: Option [A]
36 The unit used to measure the distance between stars is :
A Galactic unit
B Light year
C Steller mile
D Cosmic kilometre
Answer: Option [B]
37 Tesla is a standard unit of which of the following ?
A Magnetic flux density
B Magnetic induction
C Magnetic field
D Magnetic moment
Answer: Option [A]
38 Which type of mirror is used in the head lights of vehicles ?
A Plain mirror
B Concave mirror
C Convex mirror
D Parabolic mirror
Answer: Option [B]
39 Heavy water is used in nuclear reactor as :
A coolant
B moderator
C fuel
D atomic smasher
Answer: Option [B]
40 Which metals are used in fuse wire :
A an alloy of tin and copper
B an alloy of tin and lead
C an alloy of tin and aluminium
D an alloy of nickel and chromium
Answer: Option [B]
41 Which device is used to convert sound energy into electrical energy ?
A Solar cell
B Gramophone
C Microphone
D Loudspeaker
Answer: Option [C]
42 The device dynamo is used to convert :
A Electrical energy into mechanical energy
B Electrical energy into heat energy
C Mechanical energy into electrical energy
D None of these
Answer: Option [C]
43 Ball pen functions on the principle of :
A Lenz's law
B Surface tension
C Doppler effect
D Gravitional force
Answer: Option [B]
44 Because of _______ red light is used for signals ?
A High frequency
B High intensity
C Long wavelength
D High refraction
Answer: Option [C]
45 Which of the following light rays is used for eliminating bacteria ?
A Alpha rays
B Infrared rays
C Ultra-violet radiation
D Microwave radiation
Answer: Option [C]
46 Which of the following principles is associated with Optical fibre ?
A Scattering
B Interference
C Total internal reflection
D Refraction
Answer: Option [C]
47 Which type of coal produces the greatest energy ?
A Coal
B Anthracite
C Lignite
D Bituminous
Answer: Option [B]
48 Ultra violet radiations of the Sun do not reach the earth because of the layer of :
A Ozone
B Carbon di-oxide
C Nitrogen
D Ammonia
Answer: Option [A]
49 Which metal is used for the manufacturing of heating elements used in electric iron ?
A Chromium
B Nichrome
C Lead
D Nickel
Answer: Option [B]
50 Which device is used to measure the speed of wind ?
A Altimeter
B Anemometer
C Calorimeter
D Chronometer
Answer: Option [B]
51 What is found in frequency modulation ?
A fixed frequency
B fixed dimension
C change in dimension only
D change in frequency and dimension
Answer: Option [A]
52 Colour of light is related to it's :
A Frequency
B Velocity
C Amplitude
D None of the above
Answer: Option [A]
53 What principle / law explains the working of hydraulic brakes in automobiles ?
A Poiseuille’s principle
B Pascal’s law
C Bernoullis law
D archimede’s principle
Answer: Option [B]
54 Which one of the following is used for sun glasses ?
A Crooks glass
B Pyrex glass
C Crystal glass
D None of the above
Answer: Option [A]
55 Good conductor of electricity is
A kerosene
B paper
C dry air
D graphite
Answer: Option [D]
56 Longitudinal waves cannot travel through
A Liquid
B fixed dimension
C Vacuum
D Gas
Answer: Option [C]
57 The fourth state of matter is known as
A Vapour
B Plasma
C Gas
D None of the above
Answer: Option [B]
58 Which of the following parts of sunlight makes the solar cooker hot ?
A Infra Red
B Ultra violet
C Cosmic rays
D Red light
Answer: Option [A]
59 ‘Cryogenics’ is a science dealing with
A growth of crystals
B high temperatures
C low temperatures
D None of the above
Answer: Option [C]
60 Spectacles used for viewing 3D films have
A Polaroids
B Concave lens
C Convex lens
D Bifocal lens
Answer: Option [A]
61 The weakest of all fundamental forces is
A Nuclear force
B Magnetic force
C Electrostatic force
D Gravitational force
Answer: Option [D]
62 1 Micron is equal to
A 10-6
B 10-8
C 10-12
D 10-14
Answer: Option [A]
63 The unit of noise polution (level) is
A decimal
B decibel
C ppm
D None of the above
Answer: Option [B]
64 The pitch of sound depends on its
A amplitude
B velocity
C frequency
D All of the above
Answer: Option [C]
65 Solar energy is due to
A chemical reaction
B combustion reaction
C fission reaction
D fusion reaction
Answer: Option [D]
66 A body absorbs heat most if it is
A black and smooth
B black and rough
C white and black
D white and rough
Answer: Option [B]
67 The slope of a velocity-time graph represents
A distance
B acceleration
C speed
D All of the above
Answer: Option [B]
68 A rear-view mirror for driving is
A convex
B concave
C inverted
D None of the above
Answer: Option [A]
69 The audio signals of TV are
A unmodulated
B velocity modulated
C Amlitude modulated
D frequency modulated
Answer: Option [D]
70 Red is used as an emergency or danger signal as
A it is scattered
B it has very high energy
C its wavelength is the longest
D None of the above
Answer: Option [C]
71 Which colour of light shows maximum deviation when passed through a prism ?
A Yellow
B Violet
C Green
D Red
Answer: Option [B]
72 Pure water is poor conductor of electricity because it is
A a non-polar solvent
B a very good solvent
C not volatile
D feebly ionized
Answer: Option [D]
73 The filament of electric bulb is made up of :
A Copper
B Lead
C Tungsten
D None of the above
Answer: Option [C]
74 The device which transfer the signal from low resistance region to high resistance region
A transistor
B capacitor
C inductor
D All of the above
Answer: Option [A]
75 When a detergent is added to pure water, its surface tension
A increases
B decreases
C becomes infinite
D remains constant
Answer: Option [B]
76 ‘Therm’ is the unit of
A speed
B light
C power
D heat
Answer: Option [D]
77 A pond water appears less deep due to
A polarisation
B refraction
C diffraction
D reflection
Answer: Option [B]
78 Heat from the Sun reaches the Earth by
A radiation
B convection
C reflection
D conduction
Answer: Option [A]
79 The mass of a star is two times the mass of the Sun. How it will come to an end
A White Dwarf
B Black hole
C Neutron Star
D None of the above
Answer: Option [C]
80 A boat will submerge when it displaces water equal to its own
A weight
B surface area
C volume
D none of the above
Answer: Option [A]
81 Where are mesons found ?
A Cosmic rays
B Gamma rays
C X-ray
D Ultra violet
Answer: Option [A]
82 Tungsten is used for the manufacture of the filament of an electric bulb, because
A It is economical
B It is malleable
C It is a good conductor
D It has a very high melting point
Answer: Option [D]
83 The term ‘Isoneph’ indicates the lines of equal
A salinity
B pressure
C cloudiness
D none of the above
Answer: Option [C]
84 The period of revolution of a geostationary satellite is
A 24 hours
B 24 days
C 365 days
D changing continuously
Answer: Option [A]
85 The time period of a seconds pendulum is
A 1 second
B 2 seconds
C 3 seconds
D 4 seconds
Answer: Option [B]
86 Lens is made up of
A Ordinary glass
B Pyrex glass
C Cobalt glass
D Flint glass
Answer: Option [D]
87 Among the following materials sound travels fastest in
A vacuum
B steel
C water
D air
Answer: Option [B]
88 Kilowatt-hour is the unit of
A light
B energy
C force
D power
Answer: Option [B]
89 The head mirror used by ENT doctors is
A convex
B concave
C plane
D plano-convex
Answer: Option [B]
90 The word ‘insolation’ means
A insoluble matters
B matters which insulate
C incoming solar radiation
D none of the above
Answer: Option [C]
91 A NOT gate can be implemented by
A a single transistor
B a single resistor
C a single diode
D two diode
Answer: Option [A]
92 The term reactor referred to in wastewater treatment is
A Clarifier
B Aeration tank
C Vassel
D Setting tank
Answer: Option [B]
93 The earth is a
A non-absorber of heat
B good reflector of heat
C bad absorber and bad radiator of heat
D good absorber and good radiator of heat
Answer: Option [C]
94 Which of the following radiations has the least wavelenght
A g-ray
B X-ray
C a-ray
D b-ray
Answer: Option [A]
95 A light year is a unit of
A distance
B speed of light
C intensity of light
D none of the above
Answer: Option [A]
96 Persons suffering from myopia are advised to use
A plano-concave lens
B convex lens
C concave lens
D plano-convex lens
Answer: Option [C]
97 The device used for locating submerged objects under sea is
A radar
B sonar
C laser
D all of the above
Answer: Option [B]
98 A device which is used to limit the current in an electrical circuit is called a
A fuse
B grid
C conductor
D none of the above
Answer: Option [A]
99 A transformer
A converts DC to AC
B converts AC voltage to DC voltage
C converts electrical energy into mechanical energy
D is used to decrease or increase AC voltage
Answer: Option [D]
100 Eclipses occur due to which optical phenomena ?
A refraction
B diffraction
C reflection
D rectilinear propagation
Answer: Option [C]
101 The material used in the fabrication of a transistor is
A Silicon
B Silver
C Aluminium
D Copper
Answer: Option [A]
102 For a person having hypermetropia, the near point is
A 25 cm
B 50 cm
C greater than 35 cm
D infinity
Answer: Option [B]
103 Angle of friction and angle of repose are
A proportional to each other
B not equal to each other
C equal to each other
D none of the above
Answer: Option [C]
104 Intensity of gravitational field of earth is maximum at
A Surface
B Poles
C Equator
D Centre of earth
Answer: Option [B]
105 The sound production by a bat is
A subsonic
B audible
C infrasonic
D ultrasonic
Answer: Option [D]
106 When a person sitting on a swing stands up the swing, the frequency of oscillation
A increases
B decreases
C becomes infinite
D does not change
Answer: Option [A]
107 Forged documents are detected by
A beta rays
B infra-red rays
C ultraviolet rays
D gamma rays
Answer: Option [C]
108 When light passes from air to glass its speed
A decreases
B increases and does not depend upon the density of glass
C speed increases and depends upon the density of the glass
D does not change
Answer: Option [A]
109 A green leaf when seen in red light would appear to be
A white
B cyan
C magenta
D black
Answer: Option [D]
110 The wave theory of light cannot explain the phenomenon of
A scattering
B polarisation
C reflection
D photoelectric effect
Answer: Option [D]
No comments:
Post a Comment