Que- While ascending a hill, the driver of the vehicle keeps the gear ratio
a. Equal to 1
b. Less than 1
c. Greater than 1
d. Either equal to or greater than 1
Answer- Either equal to or greater than 1
Que- Coolis tube is used to produce
a. Radio waves
b. Micro waves
c. X-rays
d. Gama rays
Answer- X-rays
Que- Who among the following discovered X-rays?
a. Marie Curie
b. J.J Thomson
c. W.C Roentgen
d. James Chadwick
Answer- W.C Roentgen
Que- Ozone layer in the outer atmosphere helps us in
a. Reflecting radio waves and makes radio communication possible
b. Regulating the temperature of atmosphere
c. Absorbing cosmic ray particles
d. Absorbing UV radiations
Answer- Absorbing UV radiations
Que- The waves used in sonography are
a. Micro waves
b. Infra-red waves
c. Sound waves
d. Ultrasonic waves
Answer- Ultrasonic waves
Que- In the remote control of television, electromagnetic waves used are
a. Ultraviolet
b. Microwave
c. Radiowave
d. Infrared
Answer- Infrared
Que- Hot water is poured simultaneously in four metallic tumblers painted outside with different points. After some time the water will be found to have cooled most in the tumbler painted.
a. Rough white
b. Rough black
c. Shining white
d. Shining black
Answer- Rough black
Que- Which of the following criterion is used for any metal to be used as a cooking material ?
a. More specific heat
b. More thermal conductivity
c. Less thermal conductivity
d. Less electrical conductivity
Answer- Less thermal conductivity
Que- Heat from the sun reaches earth by the process of
a. Conduction
b. Convection
c. Radiation
d. All of the above
Answer- Radiation
Que- Ocean currents are an example of
a. Convection
b. Conduction
c. Insulation
d. Radiation
Answer- Convection
Que- What type of heat transfer is boiling water?
a. Radiation
b. Conduction
c. Convection
d. None of the above
Answer- Convection
Que- Conservation of energy refers to the fact that
a. If you conserve energy you will not be as tired
b. Energy cannot be created or destroyed but can be converted from one form to another
c. No chemical reaction is 100 percent efficient
d. The entropy of the universe is always increasing
Answer- Energy cannot be created or destroyed but can be converted from one form to another
Que- Which of the following causes adiabatic temperature changes in atmosphere?
a. Deflection and advection
b. Latent heat of condensation
c. Expansion and compression of the air
d. Partial absorption of solar radiation by the atmosphere
Answer- Expansion and compression of the air
Que- Which of the following options correctly explains the term heat budget?
a. It is a mode of transfer of heat through matter by molecular activity.
b. It is the balance between incoming and outgoing radiation
c. It is the radiation from the earth in the form of long waves.
d. It is the amount of heat which the surface of earth receives from the sun.
Answer- It is the balance between incoming and outgoing radiation
Que- Which one of the following is not a feature of Indifference Curve?
a. They do not intersect each other
b. They slope downwards to the right
c. They are parallel to each other
d. They are concave to each other
Answer- They are concave to each other
Que- Instruments for measuring Solar Radiation?
a. Ammeter
b. Pyranometer
c. Dynamometer
d. Anemometer
Answer- Pyranometer
Que- Water cannot be used to extinguish fire caused by electric current, because
a. It may cause electrocution
b. It may cause hydrolysis
c. It may cause electrolysis
d. It may spoil the wiring
Answer- It may cause electrocution
Que- Brightness of bulb depends on voltage or current?
a. Current
b. Voltage
c. Both A & B
d. None
Answer- Both A & B
Que- The resistance of a conductor is inversely proportional to its:
a. Length
b. Resistivity
c. Temperature
d. Area of cross section
Answer- Area of cross section
Que- Which one of the following is an ohmic conductor?
a. Germanium
b. Silicon
c. Carbon
d. Silver
Answer- Silver
Que- What is the effective resistance (in Ω) of two resistors 20 Ω and 30 Ω connected in parallel?
a. 50
b. 12
c. 24
d. 36
Answer- 12
Que- Lux is the SI unit of
a. Luminous flux
b. Luminous efficiency
c. Intensity of illumination
d. Luminous intensity
Answer- Intensity of illumination
Que- Which of the following are used for accurately measuring very small time intervals ?
a. Pulsars
b. Quartz clocks
c. Atomic clocks
d. White dwarfs
Answer- Atomic clocks
Que- Which of the following is the unit of Astronomical Distance ?
a. Metre/sec
b. Sec
c. Para/sec
d. Parsec
Answer- Metre/sec
Que- What is unit of Astronomical distance ?
a. Light year
b. Angstrom
c. Weber
d. Lux
Answer- Light year
Que- Which of the following is optical illusion?
a. Rainbow
b. Earthshine
c. Halo
d. Mirage
Answer- Mirage
Que- One can distinguish a telescope from a microscope by observing
a. Length
b. Colour
c. Size of the lens
d. Length and size of the lens
Answer- Length and size of the lens
Que- Electron microscope works on which of the following principles?
a. Optical interference
b. Wave Nature of electrons
c. Motion of charged particle in electromagnetic fields
d. Faraday's law of Electromagnetic induction
Answer- Wave Nature of electrons
Que- Holography is a technique of
a. Recording a permanent, sharp two diimensional black and white or multicolour photograph
b. Recording a permanent three dimensional multicolour photograph
c. Recording a permanent three dimensional black and white photograph
d. Recording a permanent three dimensional photograph of a given single colour or a multicolour
Answer- Recording a permanent three dimensional photograph of a given single colour or a multicolour
Que- Optical fiber works on the principle of
a. Scattering
b. Interference
c. Total internal reflection
d. Refraction
Answer- Total internal reflection
Que- Which one type of radiation has the longest wave length
a. Infrared
b. Ultraviolet
c. X-ray
d. Radio Wave
Answer- Radio Wave
Que- Forged documents are detected by
a. Ultraviolet rays
b. Infra-red rays
c. Beta rays
d. Gamma rays
Answer- Ultraviolet rays
Que- The radiation initially produced in fluorescent tube is
a. Infrared
b. Ultraviolet
c. Microwaves
d. X-rays
Answer- Ultraviolet
Que- In a vacuum, all electromagnetic waves have the same
a. Velocity
b. Wavelenth
c. Frequency
d. All the above
Answer- Velocity
Que- Ultra violet radiations of the Sun do not reach the earth because, earth's atmosphere is surrounded by
a. Carbon dioxide
b. Ammonia
c. Chlorine
d. Ozone
Answer- Ozone
Que- The combined gas law relates which of the following?
a. Volume & Temperature
b. Temperature & Pressure
c. Volume & Pressure
d. Volume, Temperature & Pressure
Answer- Volume, Temperature & Pressure
Que- The primary agent of contact metamorphism is
a. Temperature
b. Pressure
c. Weathering
d. Flowing water
Answer- Temperature
Que- For accurate scientific work, temperatures are often measured by
a. Mercury thermometers
b. Alcohol thermometers
c. Platinum resistance thermometers
d. Thermoelectric thermometers
Answer- Platinum resistance thermometers
Que- In heating frozen foods in sealed pouches in a microwaves, why do you first poke holes in the pouch?
a. To prevent the steam pressure from bursting open the pouch
b. To allow the heat to get into the food through the hole
c. To allow the microwaves to get into the food through the holes
d. To allow the aroma of the food to come out through the holes
Answer- To prevent the steam pressure from bursting open the pouch
Que- When two ice cubes are pressed together, they join to form one cube. Which one of the following helps to hold them together?
a. Hydrogen bond formation
b. Vander waals forces
c. Covalent attraction
d. Dipole interaction
Answer- Hydrogen bond formation
Que- Lightning is produced when
a. Similar charges of electricity rush towards each other and then get repelled
b. Clouds strike against impurities in air and the friction burns up these impurities
c. Strong opposite charges in different clouds break down the resistance offered by the intervening air
d. Water vapour produces electricity in the clouds
Answer- Strong opposite charges in different clouds break down the resistance offered by the intervening air
Que- The metal used to make lightning conductors is
a. Iron
b. Aluminium
c. Copper
d. Zinc
Answer- Copper
Que- Good conductor of electricity is
a. Dry air
b. Paper
c. Kerosene
d. Graphite
Answer- Graphite
Que- Materials that usually are good conductors of electricity?
a. Aluminium
b. Lead
c. Nickel
d. Wood
Answer- Aluminium
Que- The modulus of rigidity is the ratio of
a. Longitudinal stress to longitudinal strain
b. Volume stress to volume strain
c. Shearing stress to shearing strain
d. Tensile stress to tensile strain
Answer- Shearing stress to shearing strain
Que- The flux commonly used in brazing is
a. Ammonium chloride
b. Borax
c. Zinc chloride
d. Resin plus alcohol
Answer- Borax
Que- How many laws of physics are there?
a. 5
b. 4
c. 3
d. 2
Answer- 3
Que- Which physicists is the writer of the book 'A Brief History of Time'?
a. Isaac Newton
b. Hans Bethe
c. Albert Einstein
d. Stephen Hawking
Answer- Stephen Hawking
Que- On which day 'National Science Day' is celebrated in India ?
a. February 23
b. February 25
c. February 26
d. February 28
Answer- February 28
Que- Waves that are required for long distance wireless communication are
a. Infrared rays
b. Ultraviolet rays
c. Radio waves
d. Microwaves
Answer- Radio waves
Que- A television channel is characterised by
a. Frequency of transmitted signal
b. Velocity of transmitted signal
c. Physical dimension of television screen
d. Size of picture tube
Answer- Frequency of transmitted signal
Que- What is found in frequency modulation ?
a. Fixed frequency
b. Fixed dimension
c. Change in frequency and dimension
d. Change in dimension only
Answer- Fixed frequency
Que- Positive feedback is used in
a. Amplifiers
b. Rectifiers
c. Oscillators
d. None of these
Answer- Oscillators
Que- While catching a ball, a player pulls down his hands to lower the–
a. Force
b. Momentum
c. Impulse
d. Catching time
Answer- Momentum
Que- Momentum is measured as the product of :
a. Mass and inertia
b. Mass and force
c. Mass and velocity
d. Mass and acceleration
Answer- Mass and velocity
Que- Two stones of different masses are dropped simultaneously from the top of a building
a. Smaller stone reaches the ground earlier
b. Larger stone reaches the ground earlier
c. Both the stones reach the ground at the same time
d. Depends on the composition of the stone
Answer- Both the stones reach the ground at the same time
Que- A man jumping out of a moving train is thrown
a. Forward
b. Backward
c. Sideways
d. None of these
Answer- Forward
Que- An object at rest will remain at rest and an object in motion will remain in motion until and unless it is acted upon by an external force. This is Newton's
a. First law
b. Second law
c. Third law
d. Fourth law
Answer- First law
Que- Heat is transmitted from higher temperature to lower temperature through the actual motion of the molecules in
a. Conduction
b. Convection
c. Radiation
d. Both conduction and convection
Answer- Convection
Que- Energy travels from Sun to Earth through
a. Conduction
b. Convection
c. Radiation
d. Modulation
Answer- Radiation
Que- Which best describes how air moves during convection?
a. Cool air falls down
b. Warm air falls down
c. Cool air is replaced by warm air
d. Air always falls down
Answer- Cool air falls down
Que- When does land breeze occur?
a. Fall
b. Winter
c. Both A & B
d. Hot summer
Answer- Both A & B
Que- The cooling by a desert Cooler is based on:
a. Hot air replacement
b. Air dehydration
c. Evaporative Cooling
d. Air Rehydration
Answer- Evaporative Cooling
Que- Rainbows are produced when sunlight :
a. Incident on rain drops hanging in the atmosphere is dispersed after suffering refraction
b. Incident on rain drops hanging in the atmosphere is dispersed after suffering refraction and internal reflection.
c. Incident on raindrops hanging in the atmosphere is dispresed after suffering reflection.
d. None of the given statements is correct.
Answer- Incident on rain drops hanging in the atmosphere is dispersed after suffering refraction and internal reflection.
Que- Red light is used for signals because it has
a. Long wavelength
b. High intensity
c. High frequency
d. Low refraction in the medium
Answer- Long wavelength
Que- Why does the sea appear blue in colour?
a. Reflection of the sun light from water surface
b. Interference of the sun light from water surface
c. Scattering of the sunlight by water molecules
d. Refraction of the sun light
Answer- Scattering of the sunlight by water molecules
Que- The sky appears blue because
a. All colours interfere to produce blue
b. In white light, the blue component dominates
c. The atmosphere scatters blue colour more than the others
d. It is actually blue
Answer- The atmosphere scatters blue colour more than the others
Que- During washing of clothes, we use indigo due to its
a. Better cleaning action
b. Proper pigmental composition
c. High glorious nature
d. Very low cost
Answer- Proper pigmental composition
Que- Weight of a body is maximum at the:
a. Equator
b. Pole
c. Subtropics
d. Tropics
Answer- Pole
Que- When a body is accelerated, then the velocity will be also
a. Increase
b. Decrease
c. Constant
d. None of the above
Answer- Increase
Que- During ________ motion of an object along a straight line, the velocity remains constant with time.
a. Linear
b. Translational
c. Uniform
d. Equilibrium
Answer- Uniform
Que- What does the slope of a velocity time graph represent?
a. Acceleration
b. Distance
c. Speed
d. Momentum
Answer- Acceleration
Que- The slope of a velocity-time graph represents
a. Acceleration
b. Displacement
c. Distance
d. Speed
Answer- Acceleration
Que- The wave theory of light can explain
a. Comptom effect
b. Photoelectric effect
c. Black body spectrum
d. Interference of light
Answer- Interference of light
Que- Matter waves are
a. De Broglie waves
b. Electromagnetic waves
c. Transverse waves
d. Longitudinal waves
Answer- De Broglie waves
Que- Intensity of any wave is proportional to which of the following?
a. Amplitude
b. Square of amplitude
c. Square root of amplitude
d. Cube of amplitude
Answer- Square of amplitude
Que- If density of oxygen is 16 times that of hydrogen, what will be their corresponding ratio of velocity of sound?
a. 4 : 1
b. 2 : 1
c. 1 : 16
d. 1 : 4
Answer- 1 : 4
Que- Which one of the following statements with regard to Jet stream, an upper level tropospheric wave, is not correct?
a. It is narrow band of high-velocity wind.
b. It follows the wave path near the tropopause at elevations of 8 km to 15 km.
c. Jet streams are typically continuous over long distances.
d. In summer, the polar front jet achieves its maximum force.
Answer- It follows the wave path near the tropopause at elevations of 8 km to 15 km.
Que- Magnetism in materials is due to
a. Electrons at rest
b. Circular motion of electrons
c. Protons at rest
d. All neutrons at rest
Answer- Circular motion of electrons
Que- The method of magnetisation is:
a. Hammering a magnet
b. Heating a magnet
c. Passing direct current through it
d. Passing alternating current through it
Answer- Hammering a magnet
Que- Magnetic keepers are pieces of
a. Nickel
b. Cobalt
c. Steel
d. Soft iron
Answer- Soft iron
Que- Curie point is the temperature at which
a. Matter becomes radioactive
b. A metal loses magnetic properties.
c. A metal loses conductivity
d. Transmutation of metal occurs.
Answer- A metal loses magnetic properties.
Que- Tesla is a unit of magnetic :
a. Flux
b. Induction
c. Moment
d. Field
Answer- Field
Que- Friction can be reduced by changing from
a. Static to Dynamic
b. Rolling to Sliding
c. Dynamic to Static
d. Sliding to Rolling
Answer- Sliding to Rolling
Que- It is more difficult to walk on ice than on a concrete road because
a. There is very little friction between the ice and feet pressing it
b. Ice is soft when compared to concrete
c. There is more friction between the ice and feer
d. None of these
Answer- There is very little friction between the ice and feet pressing it
Que- A ball rolling along the ground gradually slows down and finally comes to rest is due to ________
a. Friction
b. Magnetic force
c. Electrostatic force
d. Muscular force
Answer- Friction
Que- Frictional force acts in
a. The same direction as the motion
b. The opposite direction of the motion
c. All the directions
d. Upward direction
Answer- The opposite direction of the motion
Que- The force which makes a vehicle to stop when break is applied is called
a. Gravitational force
b. Vanderwalls force
c. Frictional force
d. Covalant force
Answer- Frictional force
Que- At the center of the sun, fusion converts hydrogen into
a. Helium
b. Plutonium
c. Water
d. Carbon
Answer- Helium
Que- Gamma rays have greatest similarity with
a. A-rays
b. B-rays
c. X-rays
d. U.V.-rays
Answer- X-rays
Que- Heavy water is used in nuclear reactor to
a. Slow down neutron
b. Absorb neutron
c. Increase temperature
d. Increase speed of neutron
Answer- Increase speed of neutron
Que- 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
Answer- Collision between fast neutrons and nitrogen nuclei present in the atmosphere
Que- What are the particles emitted by radioactive element after 3 consecutive disintegration?
a. 2 alpha 1 beta
b. 1 alpha 1 beta
c. 2 beta 1 alpha
d. 2 beta 2 alpha
Answer- 2 beta 1 alpha
Que- Force of impact is the force
a. By the objects weight
b. By the speed of the object
c. When the objects meet
d. None of the above
Answer- When the objects meet
Que- A rubber ball is dropped from a height of 2 metres. To what height will it rise if there is no loss of energy/velocity after rebounding ?
a. 4 metres
b. 3 metres
c. 2 metres
d. 1 metre
Answer- 2 metres
Que- A piece of paper and a cricket ball are dropped from the same height. Under which of the following conditions do both reach the surface simultaneously ?
a. They must have the same volume
b. They must have the same density
c. They must have the same mass
d. They must be dropped in vacuum
Answer- They must be dropped in vacuum
Que- Angle of friction and angle of repose are
a. Equal to each other
b. Not equal to each other
c. Proportional to each other
d. None of the above
Answer- Equal to each other
Que- The term ''Higgs Boson' is associated with
a. Nano Technology
b. Oncology
c. God Particle
d. Stem Cell Research
Answer- God Particle
Que- Which one among the following is not an electromagnetic wave?
a. X-Ray
b. R-Ray
c. Cathode Ray
d. Infrared Ray
Answer- Cathode Ray
Que- Electromagnetic waves are transverse in nature is evident by
a. Reflection
b. Polarisation
c. Interference
d. Diffraction
Answer- Polarisation