Here we have mentioned most frequently asked Physics Interview Questions and Answers specially for freshers and experienced.
1. Which of the following measurements is not a unit of distance?
A. Ammeter
B. Cubit
C. Parsec
D. angstrom
Ans:
A. Ammeter
2. Which one of the following remains constant while throwing a ball upward?
A. Displacement
B. Kinetic energy
C. Acceleration
D. Velocity
Ans:
C. Acceleration
3. Pure water freezes at what temperature?
A. 47 F
B. 32 F
C. 0 F
D. 19 F
Ans:
B. 32 F
4. Which vitamin is abundant in citrus fruits?
A. Vitamin A
B. Vitamin B
C. Vitamin C
D. Vitamin D
Ans:
C. Vitamin C
5. Zinc Oxide is
A. Acidic
B. Basic
C. Neutral
D. Amphoteric
Ans:
D. Amphoteric
6. Pure water is a _____________ Conductor of electricity.
A. super conductor
B. bad conductor
C. speed conductor
D. None of these
Ans:
B. bad conductor
7. What element’s three isotopes have different names?
A. Helium
B. Oxygen
C. Carbon
D. Hydrogen
Ans:
D. Hydrogen
8. On which one of the following conservation laws, does a rocket work?
A. Mass
B. Energy
C. Linear momentum
D. Angular momentum
Ans:
C. Linear momentum
9. Which one among the following radiations carries maximum energy?
A. Ultraviolet rays
B. Gamma rays
C. X- rays
D. Infra red rays
Ans:
B. Gamma rays
10. The Central Arid Zone Research Institute (CAZRI) is located at
A. Jaipur
B. Jodhpur
C. Jaisalmer
D. Jallandhar
Ans:
B. Jodhpur
11. What is the main constituent of coal gas?
A. Oxygen
B. Water
C. Nitrogen
D. Methane
Ans:
C. Nitrogen
12. Recoil of a gun is an example of
A. Conservation of mass
B. conservation of energy
C. conservation into KE
D. conservation of linear momentum
Ans:
D. conservation of linear momentum
13. What is the heaviest of the naturally occurring Noble gases?
A. Radon
B. Xenon
C. Helium
D. Argon
Ans:
A. Radon
14. Aviation fuel for Jet aero planes consists of purified
A. Petrol
B. Kerosene
C. Gasoline
D. Diesel
Ans:
B. Kerosene
15. A piece of stone and or iron traveling through space that moves through the earth’s atmosphere is
A. Planet
B. Sun
C. Moon
D. Meteor
Ans:
D. Meteor
16. Which one of the following common devices works on the basis of the principle of mutual induction?
A. Tube light
B. Transformer
C. Photodiode
D. Led
Ans:
B. Transformer
17. Dc current can be controlled by which one of the following components?
A. Impedance
B. Resistance
C. Capacitance
D. Inductance
Ans:
B. Resistance
18. Mesons are found in
A. Alpha -rays
B. Laser beam
C. X – rays
D. Cosmic rays
Ans:
D. Cosmic rays
19. A moderator is used in nuclear reactors in order to
A. increase the motoneurons
B. decrease the motoneurons
C. slow down the speed of neutrons
D. Anthony S. D’Mello
Ans:
C. slow down the speed of neutrons
20. The wavelength of X-rays is of the order of
A. 1 cm
B. 1 m
C. 10 micron
D. 1 Angstrom
Ans:
D. 1 Angstrom
21. In a sitar wire which one of the following types of vibration is produced?
A. Progressive longitudinal
B. Stationary longitudinal
C. Progressive transverse
D. Stationary transverse
Ans:
A. Progressive longitudinal
22. Which gas in the atmosphere saves us from the ultra violet rays of the sun?
A. Nitrogen
B. Oxygen
C. Ozone
D. Carbon Monoxide
Ans:
C. Ozone
23. What is the study of plants called?
A. Physics
B. Chemistry
C. Zoology
D. Biology
Ans:
D. Biology
24. The three methods of science are observation, experimentation and
A. Hypothesis
B. Measurement
C. Deduction
D. inference
Ans:
B. Measurement
25. The Central Arid Zone Research Institute (CAZRI) is located at
A. Jaipur
B. Jodhpur
C. Jaisalmer
D. Jallandhar
Ans:
B. Jodhpur
26. What is the more common name for a polymer of amino acids?
A. Protein
B. Carbohydrate
C. Enzyme
D. Sugar
Ans:
A. Protein
27. Which rare element would you associate with Marie and Pierre Curie?
A. Uranium
B. Gold
C. Radium
D. Platinum
Ans:
C. Radium
28. Which chemical element is represented by the symbol Zn?
A. Aluminum
B. Copper
C. Gold
D. Zinc
Ans:
D. Zinc
29. Who discovered Penicillin?
A. Robert Koch
B. Sir Alexander Fleming
C. Watson and Crick
D. Louis Pasteur
Ans:
B. Sir Alexander Fleming
30. In which one among the following is the speed of sound maximum?
A. Alit at 0 degree
B. Alit at 100 degree
C. Water
D. Wood
Ans:
C. Water
31. Optic fibers are mainly used for which of the following?
A. Communication
B. Weaving
C. Musical instruments
D. Food industry
Ans:
A. Communication
32. Who invented Bakelite?
A. Charles Goodyear
B. Leo Hendrik Baekeland
C. Roy Plunkett
D. Henry Ford
Ans:
B. Leo Hendrik Baekeland
33. Rocket engine works on the principle of
A. Newtons third law
B. Newtons first law
C. Newtons second law
D. None of these.
Ans:
A. Newtons third law
34. Cryogenic engines find application in
A. Rocket technology
B. Frost free refrigerators
C. Sub-marine propulsion
D. researches in superconductivity
Ans:
A. Rocket technology
35. The best and the poorest conductors of heat are respectively
A. Silver(AG) and lead(PB)
B. Copper(CU) dialuminium (AL)
C. Silver(AG)and gold(AU)
D. Copper(CU)and gold(AU)
Ans:
A. Silver(AG) and lead(PB)
36. What is the main component of biogas and natural gas?
A. Ethane
B. Methane
C. Propane
D. Butane
Ans:
B. Methane
37. Who of the following recognized that large quantity of energy is released as a result of the fusion of hydrogen nuclei to form deuterium?
A. Enrico Fermi
B. Glenn Seaborg
C. Hans Bethe
D. Werner Heisenberg
Ans:
A. Enrico Fermi
38. The phenomenon of total internal reflection is observed in which one of the following?
A. Glowing tube light
B. Light passing through lens
C. Sparkling diamond
D. Twinkling star.
Ans:
A. Glowing tube light
39. Through which one among the following materials does sound travel slowest?
A. Air
B. Glass
C. Water
D. Wood
Ans:
D. Wood
40. Which one of the following is printed on a commonly used fluorescent tube light?
A. 220 K
B. 273 K
C. 6500 K
D. 9000 K
Ans:
C. 6500 K
41. On a clean glass plate a drop of water spreads to form a thin layer whereas a drop of mercury remains almost spherical because
A. mercury is a metal
B. density of mercury is greater than that of water
C. cohesion of mercury is greater than its adhesion with glass
D. cohesion of water is greater than its adhesion with glass
Ans:
C. cohesion of mercury is greater than its adhesion with glass
42. The source of sun’s radium energy is
A. nuclear fusion
B. nuclear fission
C. magnetic traps
D. cosmic radiations
Ans:
A. nuclear fusion
43. A device used for measuring the depth of the sea is called
A. manometer
B. fathometer
C. altimeter
D. hydrometer
Ans:
B. fathometer
44. What do we call a substance which is repelled by a magnet?
A. paramagnetic
B. diamagnetic
C. ferromagentic
D. none of these
Ans:
B. diamagnetic
45. Magnetism at the centre of a bar magnet is
A. maximum
B. minimum
C. zero
D. all the above
Ans:
C. zero
46. The principle of Dynamo was discovered by
A. Max Planck
B. Michael Faraday
C. Albert Einstein
D. Sir Humphrey Davy
Ans:
B. Michael Faraday
47. Production of beats is a result of the phenomenon of
A. reflection
B. resonance
C. interference
D. superposition
Ans:
C. interference
48. Which one of the following would be most powerful electro magnet?
A. soft iron
B. steel
C. copper
D. air
Ans:
A. soft iron
49. Recording of sound on tapes was first invented by
A. Fleming
B. Ampere
C. Poulsen
D. Becquerrel
Ans:
C. Poulsen
50. A woman’s voice is shriller than man’s voice due to
A. lower frequency
B. higher frequency
C. weak vocal chords
D. higher amplitude
Ans:
B. higher frequency
51. Rain is falling vertically downwards. To a man running east-wards, the rain will appear to be coming from
A.east
B.west
C.northeast
D.southeast
Ans:
A.east
52. Suitable impurities are added to a semiconductor depending on its use. This is done in order to
A. increase its life
B. enable it to withstand higher voltages
C. increase its electrical conductivity
D. increase its electrical resistivity
Ans:
A. increase its life
53. Stars twinkle because
A.the intensity of light emitted by them changes with time
B. the distance of the stars from the earth changes with time
C. the refractive index of the different layers of the earth’s atmosphere changes continuously, consequently the position of the image of a start changes with time
D. the light from the star is scattered by the dust particles and air molecules in the earth’s atmosphere
Ans:
B. the distance of the stars from the earth changes with time
54. It takes much longer to cook food in the hills than in the plains, because
A.in the hills the atmospheric pressure is lower than that in the plains and therefore water boils at a temperature lower than 100oC causing an increase in cooking time
B. due to low atmospheric pressure on the hills, the water boils at a temperature higher than 100oC and therefore water takes longer to boil
C.in the hills the atmospheric density is low and therefore a lot of heat is lost to the atmosphere
D.in the hills the humidity is high and therefore a lot of heat is absorbed by the atmosphere leaving very little heat for cooking
Ans:
A.in the hills the atmospheric pressure is lower than that in the plains and therefore water boils at a temperature lower than 100oC causing an increase in cooking time
55. Moment of inertia is
A.vector
B. scalar
C. phasor
D. tensor
Ans:
D. tensor
56. Of the following natural phenomena, tell which one known in Sanskrit as ‘deer’s thirst’?
A.Rainbow
B.Earthshine
C.Halo
D.Mirage
Ans:
D.Mirage
57. Inside an aeroplane, flying at a high altitude,
A.the pressure is the same as that outside
B.normal atmospheric pressure is maintained by the use of air pumps
C.the pressure inside is less than the pressure outside
D.normal humidity and partial vacuum are maintained
Ans:
B.normal atmospheric pressure is maintained by the use of air pumps
58. Sound travels with a different speed in media. In what order does the velocity of sound increase in these media?
A.Water, iron and air
B.Iron, air and water
C.Air, water and iron
D.Iron, water and air
Ans:
D.Iron, water and air
59. One thousand microns is equal to
A.10-3m
B.10-6m
C.10-9m
D.10-12m
Ans:
A.10-3m
60. Sound travels at the fastest speed in
A.steel
B.water
C.air
D.vacuum
Ans:
D.vacuum
61. oil raise up the wick in a lamp. The principle involves
A.the diffusion of oil through the wick
B.the liquid state of oil
C.capillary action phenomenon
D.volatility of oil
Ans:
B.the liquid state of oil
62. Superconductors are substances which
A.conduct electricity at low temperature
B.offer high resistance to the flow of current
C.offer no resistance to the flow of electricity
D.conduct electricity at high temperatures
Ans:
B.offer high resistance to the flow of current
63. Light travels at the fastest speed in
A.glass
B.water
C.hydrogen
D.vacuum
Ans:
A.glass
64. Railway tracks are banked on curves
A.necessary centrifugal force may be obtained from the horizontal component weight of the train
B.to avoid frictional force between the tracks and wheels
C.necessary centripetal force may be obtained from the horizontal component of the weight of the train
D.the train may not fly off in the opposite direction
Ans:
A.necessary centrifugal force may be obtained from the horizontal component weight of the train
65. On a cold day when a room temperature is 15oC, the metallic cap of a pen becomes much colder than its plastic body, though both are at the same temperature of 15oC, because
A.metals have higher thermal capacity than plastics
B.plastics have a lower density than metals
C.metals are good conductor of heat
D.plastics have a higher thermal conductivity than metals
Ans:
C.metals are good conductor of heat
66. Sound produced at a point is heard by a person after 5 second, while the same sound is heard by another person after 6 seconds. If the speed of sound is 300 m/s, what could be the maximum and minimum distances between the two persons?
A.1.8 km, 0.15 km
B.2.2 km, 0.20 km
C.2.8 km, 0.25 km
D.3.3 km, 0.30 km
Ans:
A.1.8 km, 0.15 km
67. Intensity of sound at a point is ____ its distance from the source.
A.directly proportional to
B.inversely proportional to
C.directly proportional to square of
D.inversely proportional to square of
Ans:
B.inversely proportional to
68. Of the four locations mentioned below the highest inside temperature will be attained in the pressure cooker operated with the pressure valve open
A.at sea level
B.at the top of Mt. Everest
C.at a place in a valley below sea level
D.in an aeroplane flying at a height of 10,000 m with inside pressure maintained at the sea level
Ans:
B.at the top of Mt. Everest
69. Radio telescopes are better than optical telescopes because
A.they can detect faint galaxies which no optical telescope can
B.they can work even in cloudy conditions
C.they can work during the day and night
D.All of the above
Ans:
B.they can work even in cloudy conditions
70. Light Emitting Diodes (LED) is used in fancy electronic devices such as toys emit
A.X-rays
B.ultraviolet light
C.visible light
D.radio waves
Ans:
D.radio waves
71. Out of the following pairs, which one does not have identical dimension?
A.Moment of inertia and moment of a force
B.Work and Torque
C.Angular momentum and Planck’s constant
D.Impulse and Momentum
Ans:
B.Work and Torque
72. Mercury is commonly used as a thermometric fluid rather than water because
A.specific heat of mercury is less than water
B.specific heat of mercury is more than water
C.mercury has greater visibility than water
D.density of mercury is more than the water
Ans:
B.specific heat of mercury is more than water
73. Optical fibre works on the
A.principle of refraction
B.total internal reflection
C.scattering
D.interference
Ans:
A.principle of refraction
74. Light from the star, Alpha Centauri, which is nearest to the earth after the sun, reaches the earth in
A.4.2 seconds
B.42 seconds
C.4.2 years
D.42 years
Ans:
B.42 seconds
75. Light year is a unit of
A.time
B.distance
C.light
D.intensity of light
Ans:
C.light
76. Mirage is due to
A.unequal heating of different parts of the atmosphere
B.magnetic disturbances in the atmosphere
C.depletion of ozone layer in the atmosphere
D.equal heating of different parts of the atmosphere
Ans:
A.unequal heating of different parts of the atmosphere
77. Light from the Sun reaches us in nearly
A.2 minutes
B.4 minutes
C.8 minutes
D.16 minutes
Ans:
C.8 minutes
78. Stars appears to move from east to west because
A.all stars move from east to west
B.the earth rotates from west to east
C.the earth rotates from east to west
D.the background of the stars moves from west to east
Ans:
A.all stars move from east to west
79. Pa(Pascal) is the unit for
A.thrust
B.pressure
C.frequency
D.conductivity
Ans:
C.frequency
80. Planets do not twinkle because
A.they emit light of a constant intensity
B.their distance from the earth does not change with time
C.they are very far away from the earth resulting in decrease in intensity of light
D.they are nearer to earth and hence we receive a greater amount of light and, therefore minor variations in the intensity are not noticeable
Ans:
C.they are very far away from the earth resulting in decrease in intensity of light
81. Metals are good conductors of electricity because
A.they contain free electrons
B.the atoms are lightly packed
C.they have high melting point
D.All of the above
Ans:
C.they have high melting point
82. Let a thin capillary tube be replaced with another tube of insufficient length then, we find water
A.will overflow
B.will not rise
C.depressed
D.change its meniscus
Ans:
D.change its meniscus
83. Out of the following pairs, choose the pair in which the physical quantities do not have identical dimension?
A.Pressure and Young’s modules
B.Planck’s constant and Angular momentum
C.Impulse and moment of force
D.Force and rate of change of linear momentum
Ans:
C.Impulse and moment of force
84. If two bodies of different masses, initially at rest, are acted upon by the same force for the same time, then the both bodies acquire the same
A.velocity
B.momentum
C.acceleration
D.kinetic energy
Ans:
B.momentum
85. Pick out the scalar quantity
A.force
B.pressure
C.velocity
D.acceleration
Ans:
B.pressure
86. Rectifiers are used to convert
A.Direct current to Alternating current
B.Alternating current to Direct current
C.high voltage to low voltage
D.low voltage to high voltage
Ans:
B.Alternating current to Direct current
87. out of the following, which is not emitted by radioactive substance?
A.Electrons
B.Electromagnetic radiations
C.Alpha particles
D.Neutrons
Ans:
D.Neutrons
88. Sound waves in air are
A.transverse
B.longitudinal
C.electromagnetic
D.polarised
Ans:
B.longitudinal
89. Magnetism at the centre of a bar magnet is
A.minimum
B.maximum
C.zero
D.minimum or maximum
Ans:
C.zero
90. It is more difficult to walk on a sandy road than on a concrete road because
A.sand is soft and concreter is hard
B.the friction between sand and feet is less than that between concrete and feet
C.the friction between sand and feet is more than that between concrete and feet
D.the sand is grainy but concrete is smooth
Ans:
B.the friction between sand and feet is less than that between concrete and feet
91. Find the maximum velocity for the overturn of a car moving on a circular track of radius 100 m. The co-efficient of friction between the road and tyre is 0.2
A.0.14 m/s
B.140 m/s
C.1.4 km/s
D.14 m/s
Ans:
D.14 m/s
92. Of the following properties of a wave, the one that is independent of the other is its
A.amplitude
B.velocity
C.wavelength
D.frequency
Ans:
A.amplitude
93. Lux is the SI unit of
A.intensity of illumination
B.luminous efficiency
C.luminous flux
D.luminous intensity
Ans:
A.intensity of illumination
94. On a rainy day, small oil films on water show brilliant colours. This is due to
A.dispersion
B.interference
C.diffraction
D.polarization
Ans:
B.interference
95. Point A is at a lower electrical potential than point B. An electron between them on the line joining them will
A.move towards A
B.move towards B
C.move at right angles to the line joining A and B
D.remain at rest
Ans:
B.move towards B
96. Materials for rain-proof coats and tents owe their water-proof properties to
A.surface tension
B.viscosity
C.specific gravity
D.elasticity
Ans:
A.surface tension
97. RADAR is used for
A.locating submerged submarines
B.receiving a signals in a radio receiver
C.locating geostationary satellites
D.detecting and locating the position of objects such as aeroplanes
Ans:
D.detecting and locating the position of objects such as aeroplanes
98. Sound of frequency below 20 Hz is called
A.audio sounds
B.infrasonic
C.ultrasonic
D.supersonics
Ans:
B.infrasonic
99. Radiocarbon is produced in the atmosphere as a result of
A.collision between fast neutrons and nitrogen nuclei present in the atmosphere
B.action of ultraviolet light from the sun on atmospheric oxygen
C.action of solar radiations particularly cosmic rays on carbon dioxide present in the atmosphere
D.lightning discharge in atmosphere
Ans:
A.collision between fast neutrons and nitrogen nuclei present in the atmosphere
100. It is easier to roll a stone up a sloping road than to lift it vertical upwards because
A.work done in rolling is more than in lifting
B.work done in lifting the stone is equal to rolling it
C.work done in both is same but the rate of doing work is less in rolling
D.work done in rolling a stone is less than in lifting it
Ans:
D.work done in rolling a stone is less than in lifting it
101. The absorption of ink by blotting paper involves
A.viscosity of ink
B.capillary action phenomenon
C.diffusion of ink through the blotting
D.siphon action
Ans:
B.capillary action phenomenon
102. Siphon will fail to work if
A.the densities of the liquid in the two vessels are equal
B.the level of the liquid in the two vessels are at the same height
C.both its limbs are of unequal length
D.the temperature of the liquids in the two vessels are the same
Ans:
B.the level of the liquid in the two vessels are at the same height
103. Large transformers, when used for some time, become very hot and are cooled by circulating oil. The heating of the transformer is due to
A.the heating effect of current alone
B.hysteresis loss alone
C.both the heating effect of current and hysteresis loss
D.intense sunlight at noon
Ans:
C.both the heating effect of current and hysteresis loss
104. Nuclear sizes are expressed in a unit named
A.Fermi
B.angstrom
C.newton
D.tesla
Ans:
A.Fermi
105. An aeroplane is flying horizontally with a velocity of 600 km/h and at a height of 1960 m. When it is vertically at a point A on the ground a bomb is released from it. The bomb strikes the ground at point B. The distance AB is
A.1200 m
B.0.33 km
C.3.33 km
D.33 km
Ans:
A.1200 m
106. One nanometer is equal to
A.10-6m
B.10-8m
C.10-9m
D.10-5m
Ans:
C.10-9m
107. Mica is used in electrical appliances such as electric iron because mica is
A.a good conductor of heat but a bad conductor of electricity
B.a bad conductor of heat but a good conductor of electricity
C.a good conductor of heat as well as electricity
D.a bad conductor of heat as well as electricity
Ans:
B.a bad conductor of heat but a good conductor of electricity
108. It is easier to roll a barrel full of coal tar than to pull it because
A.the full weight of the barrel comes into play when it is pulled
B.the rolling friction is much less than the sliding friction
C.more surface area of the barrel is in contact with the road when it is pulled
D.coal tar is a liquid and it flows in the barrel when it is rolled
Ans:
B.the rolling friction is much less than the sliding friction
109. Minimum number of unequal vectors which can give zero resultant are
A.two
B.three
C.four
D.more than four
Ans:
D.more than four
110. Intensity of sound has
A.an object existence
B.a subject existence
C.no existence
D.both subjective and objective existence
Ans:
A.an object existence
111. Rain is falling vertically downwards. To a man running east-wards, the rain will appear to be coming from
A.east
B.west
C.northeast
D.southeast
Ans:
A.east
112. Solar eclipse will take place when
A.the sun is between the moon and the earth
B.the earth is between the moon and the sun
C.the moon is between the sun and the earth
D.the moon does not lie on the line joining the sun and the earth
Ans:
D.the moon does not lie on the line joining the sun and the earth
113. An aeroplane is flying horizontally with a velocity of 600 km/h and at a height of 1960 m. When it is vertically at a point A on the ground a bomb is released from it. The bomb strikes the ground at point B. The distance AB is
A.1200 m
B.0.33 km
C.3.33 km
D.33 km
Ans:
C.3.33 km
114. One watt-hour is equivalent to
A.6.3 x 103 J
B.6.3 x 10-7 J
C.3.6 x 103 J
D.3.6 x 10-3 J
Ans:
B.6.3 x 10-7 J
115. Sir C.V. Raman was awarded Nobel Prize for his work connected with which of the following phenomenon of radiation?
A.Scattering
B.Diffraction
C.Interference
D.Polarization
Ans:
A.Scattering
116. In which of the following industries is mica as a raw material?
A.Cement
B.Glass and Pottery
C.Iron and Steel
D.Electrical
Ans:
A.Cement
117. Radiocarbon dating technique is used to estimate the age of
A.rocks
B.monuments
C.soil
D.fossils
Ans:
C.soil
118. Identify the vector quantity from the following
A.Heat
B.Angular momentum
C.Time
D.Work
Ans:
D.Work
119. Large astronomical telescopes always use as objective
A.lens
B.mirror
C.combinations of lenses
D.None of the above
Ans:
C.combinations of lenses
120. One should not connect a number of electrical appliances to the same power socket because
A.this can damage the appliances due to overloading
B.this can damage the domestic wiring due to overloading
C.this can damage the electrical meter
D.the appliance will not get full voltage
Ans:
B.this can damage the domestic wiring due to overloading
121. Rainbow is produced when sunlight fall on drops of rain. Which of the following physical phenomena are responsible for this? Diffusion Refraction Internal reflection
A.I, II and III
B.I and II
C.II and III
D.I and III
Ans:
C.II and III
122. Natural radioactivity was discovered by
A.Marie Curie
B.Ernest Rutherfor
C.Henry Baquerel
D.Enrico Fermi
Ans:
C.Henry Baquerel
123. Planets are
A.luminous heavenly bodies revolving around a star
B.non-luminous heavenly bodies
C.luminous heavenly bodies that twinkle
D.luminous heavenly bodies that do not twinkle
Ans:
D.luminous heavenly bodies that do not twinkle
124. Supersonic plane fly with the speed
A.less than the speed of sound
B.of sound
C.greater than the speed of sound
D.of light
Ans:
C.greater than the speed of sound
125. Mach number is used in connection with the speed of
A.sound
B.aircraft
C.spacecraft
D.ships
Ans:
C.spacecraft
126. On a stationary sail boat, air is blown from a fan attached to the boat. The boat
A.moves in opposite direction in which the air is blown
B.does not move
C.moves in the same direction in which air blows
D.spins around
Ans:
C.moves in the same direction in which air blows
127. Rainbow is due to
A.absorption of sunlight in minute water droplets
B.diffusion of sunlight through water droplets
C.ionisation of water deposits
D.refraction and reflection of sunlight by water droplets
Ans:
D.refraction and reflection of sunlight by water droplets
128. Stars which appear single to the naked eye but are double when seen through a telescope are
A.novas and supernovas
B.binaries
C.asteroids
D.quasars
Ans:
A.novas and supernovas
129. ML2T-2 is the dimensional formula for
A.moment of inertia
B.pressure
C.elasticity
D.couple acting on a body
Ans:
D.couple acting on a body
130. Liquid metal is
A. zinc
B. saline
C. lead
D. mercury
Ans:
D. mercury
131. Colour formation in thin films is due to
A. reflection
B. refraction
C. interference
D. diffraction
Ans:
C. interference
132. A transformer
A. transforms energy
B. generates e.m.f.
C. transforms frequency
D. transforms voltage
Ans:
B. generates e.m.f.
133. Sound travels fast through
A. water
B. air
C. steel
D. vacuum
Ans:
C. steel
134. The lens used to rectify long sight is
A. convex lens
B. concave lens
C. plano concave lens
D. plano convex lens
Ans:
A. convex lens
135. A watch based on the oscillating spring is taken from earth to moon, it will
A. run slow
B. run fast
C. stop altogether
D. give the same time
Ans:
D. give the same time
136. When milk is churned cream gets separated due to
A. gravitational force
B. frictional force
C. centripetal force
D. centrifugal force
Ans:
D. centrifugal force
137. We cannot see during a fog because of
A. refraction
B. internal reflection
C. scattering of light
D. reflection of light
Ans:
C. scattering of light
138. Earthquake is measured using
A. seismograph
B. altimeter
C. barometer
D. laser rays
Ans:
A. seismograph
139. The term Mach is used to measure speed of
A. sound
B. wind
C. ship
D. aeroplane
Ans:
D. aeroplane
140. Who is the father of discoveries?
A. Edison
B. Pascal
C. Einstein
D. Archimedes
Ans:
D. Archimedes
141. X–rays travel with the velocity of
A. positive rays
B. sound
C. light
D. alpha rays
Ans:
C. light
142. Power of a lens is measured in
A. ultrasonic unit
B. decibel
C. dioptre
D. magnification
Ans:
C. dioptre
143. Bhabha Atomic Research Centre(BARC) is located at
A. Colaba
B. Trombay
C. Malabar
D. Juhu
Ans:
B. Trombay
144. Power reactor is located in Tamil Nadu at
A. Kalpakkam
B. Sriharikota
C. Tuticorn
D. Pudukottai
Ans:
A. Kalpakkam
145. Einstein got the Nobel Prize for his theory of
A. radio activity
B. relativity
C. polarisation
D. photo electric effect
Ans:
B. relativity
146. Television was discoved by
A. Bohr
B. J.L.Baird
C. Becquerrel
D. H.J.Bhaba
Ans:
B. J.L.Baird
147. An artificial satellite can be tracked very precisely from the earth by using
A. sonar
B. radar
C. zeeman effect
D. doppler effect
Ans:
D. doppler effect
148. Solar cells are made up of
A. germanium
B. helium
C. both silicon and germanium
D. silicon
Ans:
C. both silicon and germanium
149. The colour of star is an indication of its
A. weight
B. size
C. temperature
D. distance from the earth
Ans:
C. temperature
150. Which one of the following is used as a moderator in nuclear reactor
A. radium
B. graphite
C. thorium
D. ordinary water
Ans:
B. graphite
151. Which one among the following radiations carries maximum energy?
A. gamma rays
B. x–rays
C. infra red rays
D. ultraviolet rays
Ans:
A. gamma rays
152. Which one of the following remains constant while throwing a ball upward?
A. velocity
B. displacement
C. acceleration
D. kinectic energy
Ans:
C. acceleration
153. Which one of the following is the unit of activity of a radioactive source?
A. Siemens
B. Lux
C. Tesla
D. Becquerrel
Ans:
D. Becquerrel
154. Which one of the following common devices works on the basis of the principle of mutual induction?
A. LED
B. Transformer
C. Photodiode
D. Tube light
Ans:
B. Transformer
155. What is the name of the nuclear reactor at trombay?
A. bhaba
B. venus
C. aryabhatta
D. apsara
Ans:
D. apsara
156. Split ring commutators are used in which of the following
A. AC motor
B. AC Dynamo
C. DC Dynamo
D. All of the above
Ans:
C. DC Dynamo
157. Which of the following can be made into a permanent magnet?
A. lead
B. soft iron
C. hard steel
D. none of these
Ans:
C. hard steel
158. Land and sea breezes are due to
A. conduction of heat
B. radiation of heat
C. convection of heat
D. conversion of heat
Ans:
C. convection of heat
159. The period of revolution of a satellite close to
A. 200 sec
B. 400 sec
C. 500 sec
D. 5000 sec
Ans:
D. 5000 sec
160. Indian Scientist who received the Nobel Prize
A. S.Ramanujam
B. H.J.Bhabha
C. Sir J.C.Bose
D. Sir C.V.Raman
Ans:
D. Sir C.V.Raman
161. Raman effect involves
A. scattering of light
B. diffraction of light
C. interference of light
D. all the above
Ans:
A. scattering of light
162. Ball pen works on the principles of
A. viscosity
B. gravitational force
C. boyle’s law
D. capilliarity and surface tension
Ans:
D. capilliarity and surface tension
163. TV waves are otherwise known as
A. radio waves
B. cosmic rays
C. micro waves
D. uv rays
Ans:
C. micro waves
164. Filament of an electric bulb is made of
A. copper
B. silver
C. iron
D. tungsten
Ans:
D. tungsten
165. The hydraulic brackes used in automobiles is a direct application of
A. Pascal’s law
B. Toricellian law
C. Bernoulli’s theorem
D. Archimede’s principle
Ans:
A. Pascal’s law
166. A falling drop of rain water acquires the spherical shape due to
A. viscosity
B. gravitational force
C. surface tension
D. atmospheric pressure
Ans:
C. surface tension
167. In a reactor, cadmium rods are used for
A. absorping neutrons
B. speeding neutrons
C. slowing fast neutrons
D. dispersing neutrons
Ans:
A. absorping neutrons
168. The difference between musical sound noise is due to
A. pitch
B. intensity
C. wavelength
D. musical instrument
Ans:
A. pitch
169. Atom bomb is based on
A. nuclear fission
B. nuclear fusion
C. chemical reaction
D. artificial radioactivity
Ans:
A. nuclear fission
170. Oil or soap film when in daylight appears coloured because of
A. reflection
B. refraction
C. interference
D. surface energy
Ans:
C. interference
171. Radiocarbon is produced in the atmosphere as a result of
A.collision between fast neutrons and nitrogen nuclei present in the atmosphere
B.action of ultraviolet light from the sun on atmospheric oxygen
C.action of solar radiations particularly cosmic rays on carbon dioxide present in the atmosphere
D.lightning discharge in atmosphere
Ans:
A.collision between fast neutrons and nitrogen nuclei present in the atmosphere
172. It is easier to roll a stone up a sloping road than to lift it vertical upwards because
A.work done in rolling is more than in lifting
B.work done in lifting the stone is equal to rolling it
C.work done in both is same but the rate of doing work is less in rolling
D.work done in rolling a stone is less than in lifting it
Ans:
D.work done in rolling a stone is less than in lifting it
173. The absorption of ink by blotting paper involves
A.viscosity of ink
B.capillary action phenomenon
C.diffusion of ink through the blotting
D.siphon action
Ans:
B.capillary action phenomenon
174. Siphon will fail to work if
A.the densities of the liquid in the two vessels are equal
B.the level of the liquid in the two vessels are at the same height
C.both its limbs are of unequal length
D.the temperature of the liquids in the two vessels are the same
Ans:
B.the level of the liquid in the two vessels are at the same height
175. Large transformers, when used for some time, become very hot and are cooled by circulating oil. The heating of the transformer is due to
A.the heating effect of current alone
B.hysteresis loss alone
C.both the heating effect of current and hysteresis loss
D.intense sunlight at noon
Ans:
C.both the heating effect of current and hysteresis loss
176. Nuclear sizes are expressed in a unit named
A.Fermi
B.angstrom
C.newton
D.tesla
Ans:
A.Fermi
177. Light year is a unit of
A.time
B.distance
C.light
D.intensity of light
Ans:
B.distance
178. Mirage is due to
A.unequal heating of different parts of the atmosphere
B.magnetic disturbances in the atmosphere
C.depletion of ozone layer in the atmosphere
D.equal heating of different parts of the atmosphere
Ans:
A.unequal heating of different parts of the atmosphere
179. Light from the Sun reaches us in nearly
A.2 minutes
B.4 minutes
C.8 minutes
D.16 minutes
Ans:
C.8 minutes
180. Stars appears to move from east to west because
A.all stars move from east to west
B.the earth rotates from west to east
C.the earth rotates from east to west
D.the background of the stars moves from west to east
Ans:
B.the earth rotates from west to east
181. Pa(Pascal) is the unit for
A.thrust
B.pressure
C.frequency
D.conductivity
Ans:
B.pressure
182. Planets do not twinkle because
A.they emit light of a constant intensity
B.their distance from the earth does not change with time
C.they are very far away from the earth resulting in decrease in intensity of light
D.they are nearer to earth and hence we receive a greater amount of light and, therefore minor variations in the intensity are not noticeable
Ans:
D.they are nearer to earth and hence we receive a greater amount of light and, therefore minor variations in the intensity are not noticeable
183. Metals are good conductors of electricity because
A.they contain free electrons
B.the atoms are lightly packed
C.they have high melting point
D.All of the above
Ans:
A.they contain free electrons
184. Let a thin capillary tube be replaced with another tube of insufficient length then, we find water
A.will overflow
B.will not rise
C.depressed
D.change its meniscus
Ans:
B.will not rise
185. Out of the following pairs, choose the pair in which the physical quantities do not have identical dimension?
A.Pressure and Young’s modules
B.Planck’s constant and Angular momentum
C.Impulse and moment of force
D.Force and rate of change of linear momentum
Ans:
C.Impulse and moment of force
186. If two bodies of different masses, initially at rest, are acted upon by the same force for the same time, then the both bodies acquire the same
A.velocity
B.momentum
C.acceleration
D.kinetic energy
Ans:
B.momentum
187. Pick out the scalar quantity
A.force
B.pressure
C.velocity
D.acceleration
Ans:
B.pressure
188. Rectifiers are used to convert
A.Direct current to Alternating current
B.Alternating current to Direct current
C.high voltage to low voltage
D.low voltage to high voltage
Ans:
B.Alternating current to Direct current
189. out of the following, which is not emitted by radioactive substance?
A.Electrons
B.Electromagnetic radiations
C.Alpha particles
D.Neutrons
Ans:
D.Neutrons
190. Sound waves in air are
A.transverse
B.longitudinal
C.electromagnetic
D.polarised
Ans:
B.longitudinal
191. Magnetism at the centre of a bar magnet is
A.minimum
B.maximum
C.zero
D.minimum or maximum
Ans:
C.zero
192. It is more difficult to walk on a sandy road than on a concrete road because
A.sand is soft and concreter is hard
B.the friction between sand and feet is less than that between concrete and feet
C.the friction between sand and feet is more than that between concrete and feet
D.the sand is grainy but concrete is smooth
Ans:
B.the friction between sand and feet is less than that between concrete and feet
193. Find the maximum velocity for the overturn of a car moving on a circular track of radius 100 m. The co-efficient of friction between the road and tyre is 0.2
A.0.14 m/s
B.140 m/s
C.1.4 km/s
D.14 m/s
Ans:
D.14 m/s
194. Of the following properties of a wave, the one that is independent of the other is its
A.amplitude
B.velocity
C.wavelength
D.frequency
Ans:
A.amplitude
195. Lux is the SI unit of
A.intensity of illumination
B.luminous efficiency
C.luminous flux
D.luminous intensity
Ans:
A.intensity of illumination
196. On a rainy day, small oil films on water show brilliant colours. This is due to
A.dispersion
B.interference
C.diffraction
D.polarization
Ans:
B.interference
197. Point A is at a lower electrical potential than point B. An electron between them on the line joining them will
A.move towards A
B.move towards B
C.move at right angles to the line joining A and B
D.remain at rest
Ans:
B.move towards B
198. Materials for rain-proof coats and tents owe their water-proof properties to
A.surface tension
B.viscosity
C.specific gravity
D.elasticity
Ans:
A.surface tension
199. RADAR is used for
A.locating submerged submarines
B.receiving a signals in a radio receiver
C.locating geostationary satellites
D.detecting and locating the position of objects such as aeroplanes
Ans:
D.detecting and locating the position of objects such as aeroplanes
200. Sound of frequency below 20 Hz is called
A.audio sounds
B.infrasonic
C.ultrasonic
D.supersonics
Ans:
B.infrasonic
201. On a clean glass plate a drop of water spreads to form a thin layer whereas a drop of mercury remains almost spherical because
A.mercury is a metal
B.density of mercury is greater than that of water
C.cohesion of mercury is greater than its adhesion with glass
D.cohesion of water is greater than its adhesion with glass
Ans:
C.cohesion of mercury is greater than its adhesion with glass
202. Suitable impurities are added to a semiconductor depending on its use. This is done in order to
A.increase its life
B.enable it to withstand higher voltages
C.increase its electrical conductivity
D.increase its electrical resistivity
Ans:
C.increase its electrical conductivity
203. Stars twinkle because
A.the intensity of light emitted by them changes with time
B.the distance of the stars from the earth changes with time
C.the refractive index of the different layers of the earth’s atmosphere changes continuously, consequently the position of the image of a start changes with time
D.the light from the star is scattered by the dust particles and air molecules in the earth’s atmosphere
Ans:
C.the refractive index of the different layers of the earth’s atmosphere changes continuously, consequently the position of the image of a start changes with time
204. It takes much longer to cook food in the hills than in the plains, because
A.in the hills the atmospheric pressure is lower than that in the plains and therefore water boils at a temperature lower than 100oC causing an increase in cooking time
B.due to low atmospheric pressure on the hills, the water boils at a temperature higher than 100oC and therefore water takes longer to boil
C.in the hills the atmospheric density is low and therefore a lot of heat is lost to the atmosphere
D.in the hills the humidity is high and therefore a lot of heat is absorbed by the atmosphere leaving very little heat for cooking
Ans:
A.in the hills the atmospheric pressure is lower than that in the plains and therefore water boils at a temperature lower than 100oC causing an increase in cooking time
205. Moment of inertia is
A.vector
B.scalar
C.phasor
D.tensor
Ans:
D.tensor
206. Of the following natural phenomena, tell which one known in Sanskrit as ‘deer’s thirst’?
A.Rainbow
B.Earthshine
C.Halo
D.Mirage
Ans:
D.Mirage
207. Inside an aeroplane, flying at a high altitude,
A.the pressure is the same as that outside
B.normal atmospheric pressure is maintained by the use of air pumps
C.the pressure inside is less than the pressure outside
D.normal humidity and partial vacuum are maintained
Ans:
B.normal atmospheric pressure is maintained by the use of air pumps
208. Sound travels with a different speed in media. In what order does the velocity of sound increase in these media?
A.Water, iron and air
B.Iron, air and water
C.Air, water and iron
D.Iron, water and air
Ans:
C.Air, water and iron
209. One thousand microns is equal to
A.10-3m
B.10-6m
C.10-9m
D.10-12m
Ans:
A.10-3m
210. Sound travels at the fastest speed in
A.steel
B.water
C.air
D.vacuum
Ans:
A.steel
211. oil raise up the wick in a lamp. The principle involves
A.the diffusion of oil through the wick
B.the liquid state of oil
C.capillary action phenomenon
D.volatility of oil
Ans:
C.capillary action phenomenon
212. Superconductors are substances which
A.conduct electricity at low temperature
B.offer high resistance to the flow of current
C.offer no resistance to the flow of electricity
D.conduct electricity at high temperatures
Ans:
C.offer no resistance to the flow of electricity
213. Light travels at the fastest speed in
A.glass
B.water
C.hydrogen
D.vacuum
Ans:
D.vacuum
214. Railway tracks are banked on curves
A.necessary centrifugal force may be obtained from the horizontal component weight of the train
B.to avoid frictional force between the tracks and wheels
C.necessary centripetal force may be obtained from the horizontal component of the weight of the train
D.the train may not fly off in the opposite direction
Ans:
C.necessary centripetal force may be obtained from the horizontal component of the weight of the train
215. On a cold day when a room temperature is 15oC, the metallic cap of a pen becomes much colder than its plastic body, though both are at the same temperature of 15oC, because
A.metals have higher thermal capacity than plastics
B.plastics have a lower density than metals
C.metals are good conductor of heat
D.plastics have a higher thermal conductivity than metals
Ans:
C.metals are good conductor of heat
216. Sound produced at a point is heard by a person after 5 second, while the same sound is heard by another person after 6 seconds. If the speed of sound is 300 m/s, what could be the maximum and minimum distances between the two persons?
A.1.8 km, 0.15 km
B.2.2 km, 0.20 km
C.2.8 km, 0.25 km
D.3.3 km, 0.30 km
Ans:
D.3.3 km, 0.30 km
217. Intensity of sound at a point is ____ its distance from the source.
A.directly proportional to
B.inversely proportional to
C.directly proportional to square of
D.inversely proportional to square of
Ans:
D.inversely proportional to square of
218. Of the four locations mentioned below the highest inside temperature will be attained in the pressure cooker operated with the pressure valve open
A.at sea level
B.at the top of Mt. Everest
C.at a place in a valley below sea level
D.in an aeroplane flying at a height of 10,000 m with inside pressure maintained at the sea level
Ans:
C.at a place in a valley below sea level
219. Radio telescopes are better than optical telescopes because
A.they can detect faint galaxies which no optical telescope can
B.they can work even in cloudy conditions
C.they can work during the day and night
D.All of the above
Ans:
D.All of the above
220. Light Emitting Diodes (LED) is used in fancy electronic devices such as toys emit
A.X-rays
B.ultraviolet light
C.visible light
D.radio waves
Ans:
C.visible light
221. Out of the following pairs, which one does not have identical dimension?
A.Moment of inertia and moment of a force
B.Work and Torque
C.Angular momentum and Planck’s constant
D.Impulse and Momentum
Ans:
A.Moment of inertia and moment of a force
222. Mercury is commonly used as a thermometric fluid rather than water because
A.specific heat of mercury is less than water
B.specific heat of mercury is more than water
C.mercury has greater visibility than water
D.density of mercury is more than the water
Ans:
C.mercury has greater visibility than water
223. Optical fibre works on the
A.principle of refraction
B.total internal reflection
C.scattering
D.interference
Ans:
B.total internal reflection
224. Light from the star, Alpha Centauri, which is nearest to the earth after the sun, reaches the earth in
A.4.2 seconds
B.42 seconds
C.4.2 years
D.42 years
Ans:
C.4.2 years
225. Supersonic plane fly with the speed
A.less than the speed of sound
B.of sound
C.greater than the speed of sound
D.of light
Ans:
C.greater than the speed of sound
226. Mach number is used in connection with the speed of
A.sound
B.aircraft
C.spacecraft
D.ships
Ans:
B.aircraft
227. On a stationary sail boat, air is blown from a fan attached to the boat. The boat
A.moves in opposite direction in which the air is blown
B.does not move
C.moves in the same direction in which air blows
D.spins around
Ans:
B.does not move
228. Rainbow is due to
A.absorption of sunlight in minute water droplets
B.diffusion of sunlight through water droplets
C.ionisation of water deposits
D.refraction and reflection of sunlight by water droplets
Ans:
D.refraction and reflection of sunlight by water droplets
229. Stars which appear single to the naked eye but are double when seen through a telescope are
A.novas and supernovas
B.binaries
C.asteroids
D.quasars
Ans:
B.binaries
230. ML2T-2 is the dimensional formula for
A.moment of inertia
B.pressure
C.elasticity
D.couple acting on a body
Ans:
D.couple acting on a body
231. Solar eclipse will take place when
A.the sun is between the moon and the earth
B.the earth is between the moon and the sun
C.the moon is between the sun and the earth
D.the moon does not lie on the line joining the sun and the earth
Ans:
C.the moon is between the sun and the earth
232. Isotopes of an element contain
A.the same number of protons but different number of neutrons
B.the same number of neutrons but different number of protons
C.equal number of protons and electrons
D.equal number of nucleons
Ans:
A.the same number of protons but different number of neutrons
233. One watt-hour is equivalent to
A.6.3 x 103 J
B.6.3 x 10-7 J
C.3.6 x 103 J
D.3.6 x 10-3 J
Ans:
C.3.6 x 103 J
234. Sir C.V. Raman was awarded Nobel Prize for his work connected with which of the following phenomenon of radiation?
A.Scattering
B.Diffraction
C.Interference
D.Polarization
Ans:
A.Scattering
235. In which of the following industries is mica as a raw material?
A.Cement
B.Glass and Pottery
C.Iron and Steel
D.Electrical
Ans:
D.Electrical
236. Radiocarbon dating technique is used to estimate the age of
A.rocks
B.monuments
C.soil
D.fossils
Ans:
D.fossils
237. Identify the vector quantity from the following
A.Heat
B.Angular momentum
C.Time
D.Work
Ans:
B.Angular momentum
238. Large astronomical telescopes always use as objective
A.lens
B.mirror
C.combinations of lenses
D.None of the above
Ans:
C.combinations of lenses
239. One should not connect a number of electrical appliances to the same power socket because
A.this can damage the appliances due to overloading
B.this can damage the domestic wiring due to overloading
C.this can damage the electrical meter
D.the appliance will not get full voltage
Ans:
B.this can damage the domestic wiring due to overloading
240. Rainbow is produced when sunlight fall on drops of rain. Which of the following physical phenomena are responsible for this?
Diffusion
Refraction
Internal reflection
A.I, II and III
B.I and II
C.II and III
D.I and III
Ans:
C.II and III
241. Natural radioactivity was discovered by
A.Marie Curie
B.Ernest Rutherfor
C.Henri Becquerel
D.Enrico Fermi
Ans:
C.Henri Becquerel
242. Planets are
A.luminous heavenly bodies revolving around a star
B.non-luminous heavenly bodies
C.luminous heavenly bodies that twinkle
D.luminous heavenly bodies that do not twinkle
Ans:
B.non-luminous heavenly bodies
243. One nanometer is equal to
A.10-6m
B.10-8m
C.10-9m
D.10-5m
Ans:
C.10-9m
244. Mica is used in electrical appliances such as electric iron because mica is
A.a good conductor of heat but a bad conductor of electricity
B.a bad conductor of heat but a good conductor of electricity
C.a good conductor of heat as well as electricity
D.a bad conductor of heat as well as electricity
Ans:
A.a good conductor of heat but a bad conductor of electricity
245. It is easier to roll a barrel full of coal tar than to pull it because
A.the full weight of the barrel comes into play when it is pulled
B.the rolling friction is much less than the sliding friction
C.more surface area of the barrel is in contact with the road when it is pulled
D.coal tar is a liquid and it flows in the barrel when it is rolled
Ans:
B.the rolling friction is much less than the sliding friction
246. Minimum number of unequal vectors which can give zero resultant are
A.two
B.three
C.four
D.more than four
Ans:
B.three
247. Intensity of sound has
A.an object existence
B.a subject existence
C.no existence
D.both subjective and objective existence
Ans:
A.an object existence