Que- Addition of suitable impurities into semiconductor, is called
a. Doping
b. Mixing
c. Forming
d. Diluting
Answer- Doping
Que- In a ________ the wave particles of the medium vibrate in a direction perpendicular to the direction of wave propagation
a. Longitudinal
b. Rolling
c. Transverse
d. Field
Answer- Transverse
Que- Which of the following is the unit of perceived loudness of sound ?
a. Decibel
b. Sone
c. Hertz
d. Phon
Answer- Sone
Que- The component used for tuning a radio is basically a variable
a. Resisto
b. Condenser
c. Inductor
d. Transformer
Answer- Condenser
Que- A wave with high amplitude have
a. High pitch
b. Low energy
c. High energy
d. Low pitch
Answer- High energy
Que- A standing wave occurs when
a. A wave reflects upon itself
b. The amplitude of a wave exceeds its wavelength
c. Two waves overlap
d. The speed of the wave is zero or near zero
Answer- A wave reflects upon itself
Que- Which of the following is a result of Surface tension ?
a. Gravitational pull
b. Viscosity
c. Capillary action
d. Radiation
Answer- Capillary action
Que- A liquid disturbed by stirring comes to rest due to
a. Density
b. Surface tension
c. Viscosity
d. Centripetal force
Answer- Viscosity
Que- A capillary tube is partially dipped vertically in a vessel containing water. Due to capillarity water rises in the tube. The height of water rise in the tube can be increased by
a. Decreasing the radius of the capillary tube
b. Increasing the radius of the capillary tube
c. Increasing the height of water in the vessel
d. None of these
Answer- Decreasing the radius of the capillary tube
Que- Oil rises up the wick in a lamp because
a. Oil is very light
b. Of the diffusion of oil through the wick
c. Of the surface tension phenomenon
d. Of the capillary action phenomenon
Answer- Of the capillary action phenomenon
Que- An ice block with a piece of lead embeded in it floats in water. If ice melts the water level
a. Rises
b. Falls
c. Remains same
d. Falls first and then rises
Answer- Falls
Que- 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
Answer- greater than the speed of sound
Que- Mach number is used in connection with the speed of
a. sound
b. aircraft
c. spacecraft
d. ships
Answer- aircraft
Que- 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
Answer- does not move
Que- 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
Answer- refraction and reflection of sunlight by water droplets
Que- 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
Answer- binaries
Que- A body of mass 2 kg is thrown upward with initial velocity of 20 m/s. After 2 seconds, its kinetic energy will be : (g = 10 m/s2)
a. 0 J
b. 200 J
c. 400 J
d. 100 J
Answer- 0 J
Que- The energy stored in a watch spring is
a. Kinetic energy
b. Potential energy
c. Heat energy
d. Chemical energy
Answer- Potential energy
Que- An object that has kinetic energy must be
a. At an elevated position
b. Falling
c. At rest
d. Moving
Answer- Moving
Que- A mass of 20 kg is at a height of 8 m above the ground. Then the potential energy possessed by the body is: [Given g = 9.8 m/s2]
a. 1568 J
b. 1568 C
c. 1568 W
d. 1568 N
Answer- 1568 J
Que- Hertz is the SI unit of
a. Weight
b. Power
c. Pressure
d. Frequency
Answer- Frequency
Que- The velocity of the sound is highest in
a. Metal
b. Air
c. Water
d. Vacuum
Answer- Metal
Que- The ordinary and maximum tolerance limit of sound by human being is
a. 50 db to 70 db (decibel)
b. 60 db to 80 db (decibel)
c. 65 db to 75 db (decibel)
d. 70 db to 85 db (decibel)
Answer- 60 db to 80 db (decibel)
Que- In SONAR which kind of wave is used?
a. Infrasonic
b. Ultrasonic
c. Radio
d. Audible sound
Answer- Ultrasonic
Que- Sound waves cannot travel through
a. Gas
b. Liquid
c. Vacuum
d. Solid
Answer- Vacuum
Que- Hydraulic machines work under the Principle of :
a. Newton's Law
b. Joules Law
c. Pascal's Law
d. Floatation Law
Answer- Pascal's Law
Que- Alcohol is more volatile than water because ________ is lower than water.
a. Its boiling point
b. Its density
c. Its viscosity
d. Its surface tension
Answer- Its boiling point
Que- A manometer is used to measure
a. Earthquake
b. Pressure
c. Temperature
d. Density
Answer- Pressure
Que- Anemometer is used to measure
a. Wind direction
b. Wind velocity
c. Pressure gradient
d. Wind speed and time
Answer- Wind velocity
Que- The instrument used to measure the speed of the wind is
a. Altimeter
b. Anemometer
c. Chronometer
d. Dosimeter
Answer- Anemometer
Que- The height of a geo-stationary satellite from the Earth's surface is approximately :
a. 36,000 km
b. 42,000 km
c. 30,000 km
d. None of these
Answer- 36,000 km
Que- Why is weightlessness experienced while orbiting the earth in space ships ?
a. Inertia
b. Acceleration
c. Zero gravity
d. None of these
Answer- None of these
Que- In the case of bodies falling under gravity which of the following remains constant at a given place?
a. Kinetic energy
b. Potential energy
c. Acceleration
d. All the above
Answer- Acceleration
Que- The instrument used to see the distant objects on the Earth is
a. Terrestrial telescope
b. Astronomical telescope
c. Compound microscope
d. Simple microscope
Answer- Terrestrial telescope
Que- Intensity of gravitational field of earth is maximum at
a. Poles
b. Equator
c. Centre of earth
d. Surface
Answer- Poles
Que- An optically plane surface reflects a beam of light
a. As a parallel beam in one direction
b. As diffused beams in all directions
c. As parallel beams in all directions
d. As a diffused beam in one direction
Answer- As a parallel beam in one direction
Que- The focal length of a concave mirror with a radius of curvature of 20.0 cm is :
a. 20 cm
b. 5 cm
c. 10 cm
d. 15 cm
Answer- 10 cm
Que- The type of mirrors used in the headlamp of cars is
a. Parabolic concave
b. Plane
c. Spherical convex
d. Cylindrical concave
Answer- Parabolic concave
Que- Shaving mirror is
a. Convex
b. Concave
c. Plane
d. Parabolic
Answer- Concave
Que- What changes will happen to a bowl of ice and water kept at exactly zero degree Celsius ?
a. All ice will melt
b. All water will become ice
c. No change will happen
d. Only some ice will melt
Answer- No change will happen
Que- Charles's law is based on
a. Solid
b. Liquid
c. Gas
d. None of the above
Answer- Gas
Que- The ''Greenhouse effect' is mainly due to increase in atmospheric
a. Ozone
b. Nitrogen
c. Sulphur dioxide
d. Carbon dioxide
Answer- Carbon dioxide
Que- Thermohaline circulation is mainly due to
a. Cold, dense ocean water sinking and warmer water replacing it
b. Winds causing circulation of ocean water
c. Warmer, less dense water sinking in the ocean and cold water replacing it
d. Warm water being added to the ocean due to industial waste
Answer- Cold, dense ocean water sinking and warmer water replacing it
Que- Which of the following device is used to measure humidity?
a. Hydrometer
b. Hygrometer
c. Psycho Meter
d. Anemometer
Answer- Hygrometer
Que- Which set of conditions represents the easiest way to liquify a gas ?
a. Low temperature and high pressure
b. High temperature and low pressure
c. Low temperature and low pressure
d. High temperature and high pressure
Answer- Low temperature and high pressure
Que- 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
Answer- the rolling friction is much less than the sliding friction
Que- Minimum number of unequal vectors which can give zero resultant are
a. two
b. three
c. four
d. more than four
Answer- three
Que- Intensity of sound has
a. an object existence
b. a subject existence
c. no existence
d. both subjective and objective existence
Answer- an object existence
Que- 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
Answer- east
Que- For a freely falling body, the sum of kinetic energy and potential energy is always
a. Zero
b. Unity
c. Same
d. Variable
Answer- Same
Que- A body of 4.0 kg is lying at rest. Under the action of a constant force, it gains a speed of 5 m/s. The work done by the force will be ________
a. 50 J
b. 30 J
c. 20 J
d. 40 J
Answer- 50 J
Que- If the velocity of a body is halved its kinetic energy ________
a. Become 4 times
b. Becomes 1/4 th
c. Is also doubled
d. Becomes half
Answer- Becomes 1/4 th
Que- Solar energy is converted into chemical energy during
a. Transpiration
b. Photosynthesis
c. Diffusion
d. Osmosis
Answer- Photosynthesis
Que- In which of the following cases, kinetic energy is being used in performing work ?
a. Paddling the bicycle to cover a distance
b. Driving a car to cover a distance
c. Wind mill grinding wheat grain
d. Rowing a boat in the lake
Answer- Driving a car to cover a distance
Que- ML2T-2 is the dimensional formula for
a. moment of inertia
b. pressure
c. elasticity
d. couple acting on a body
Answer- couple acting on a body
Que- 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
Answer- the moon is between the sun and the earth
Que- 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
Answer- the same number of protons but different number of neutrons
Que- 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
Answer- Scattering
Que- The unit of energy in MKS system is
a. Joule
b. Ohm
c. Erg
d. Volt
Answer- Joule
Que- One light year is equal to
a. 2 trillion miles
b. 6 trillion miles
c. 8 trillion miles
d. 9 trillion miles
Answer- 6 trillion miles
Que- Parsec is the unit of
a. Distance
b. Time
c. Intensity of light
d. Magnetic line
Answer- Distance
Que- One nanometer is equal to ________ meters.
a. 10 raised to the power (-3)
b. 10 raised to the power (-6)
c. 10 raised to the power (-9)
d. 10 raised to the power (-12)
Answer- 10 raised to the power (-9)
Que- The Length of the Day is determined in
a. Length of the hours
b. Length of the year
c. Astronomical units
d. Solar terms
Answer- Astronomical units
Que- If a copper wire is increased to double its length, its resistance will become
a. Four times
b. One–fourth
c. Double
d. Half
Answer- Four times
Que- The filament of electric bulb is made up of :
a. Copper
b. Nichrome
c. Lead
d. Tungsten
Answer- Tungsten
Que- Full form of CFL used in place of electric bulbs is
a. Compact fluorescent lamp
b. Constantan filament lamp
c. Closed filament lamp
d. Closed fluorescent lamp
Answer- Compact fluorescent lamp
Que- Two electric bulbs marked 25W – 220V and 100W – 220V are connected in series to a 440Vsupply. Which of the bulbs will fuse?
a. 25 W
b. Both
c. 100 W
d. Neither
Answer- 25 W
Que- 1 WH =
a. 360 joules
b. 36000 joules
c. 3600 joules
d. 36 joules
Answer- 3600 joules
Que- Rainbow is seen after rain because of hanging molecules of water which act as
a. Lenses
b. Mirrors
c. Prisms
d. Slabs
Answer- Mirrors
Que- The information of brilliant colors in a thin soap film is a consequence of the phenomena of
a. Polarization and interference
b. Diffraction and dispersion
c. Multiple refraction and dispersion
d. Multiple reflection and interference
Answer- Multiple reflection and interference
Que- Optic fibres are used in :
a. CAT scans
b. X-ray photos
c. Ultrasound scans
d. Endoscopy
Answer- Endoscopy
Que- Purpose of an optical filter is to
a. Reflect lights of different colours
b. Dispense light into component colours
c. Refract light of different colours
d. Transmit or absorb light of different colours
Answer- Transmit or absorb light of different colours
Que- Parabolic mirrors are used in
a. Car headlights
b. Driving mirrors
c. Dentists mirros
d. Shaving mirros
Answer- Car headlights
Que- When a bullet is fired from a gun
a. The gun moves forward
b. The gun jumps up
c. The gun does not move
d. The gun recoils with the same momentum as the bullet
Answer- The gun recoils with the same momentum as the bullet
Que- The inability of a body to change its state of rest or uniform motion along a straight line is called its
a. Momentum
b. Velocity
c. Acceleration
d. Inertia
Answer- Inertia
Que- The moment of inertia of a body does not depend upon its
a. Axis of rotation
b. Angular velocity
c. Form of mass
d. Distribution of mass
Answer- Angular velocity
Que- An athlete runs before long jump to get advantage on
a. Inertia of motion
b. Frictional force
c. Moment of a force
d. Principle of moments
Answer- Inertia of motion
Que- What is the gravity of moon as compared to the Earth
a. 1/4 th of Earth
b. 1/5 th of Earth
c. 1/6 th of Earth
d. 1/8 th of Earth
Answer- 1/6 th of Earth
Que- Gravitational force is maximum at which place
a. Poles
b. Tropic of cancer
c. Tropic of capricorn
d. Equator
Answer- Poles
Que- A metal ball and a rubber ball, both having the same mass, strike a wall normally with the same velocity. The rubber ball rebounds and the metal ball does not rebound. It can be concluded that
a. The rubber ball suffers greater change in momentum
b. The metal ball suffers greater change in momentum
c. Both suffer the same change in momentum
d. The initial momentum of the rubber ball is greater than that of the metal ball
Answer- The rubber ball suffers greater change in momentum
Que- A boy sitting in an open car moving with the constant speed throws a ball straight up into the air. The ball falls
a. Behind him
b. In front of him
c. Into his hand
d. By his side
Answer- Behind him
Que- Rate of change of momentum is
a. Area
b. Pressure
c. Force
d. Velocity
Answer- Force
Que- Which law is also called law of inertia ?
a. Newton first law
b. Newton second law
c. Newton third law
d. All of above
Answer- Newton first law
Que- Which of the following scientific discoveries was made by C.V. Raman?
a. Inelastic scattering of light by molecules
b. Super Conductivity
c. Controlled nuclear fission
d. Cyclotron
Answer- Inelastic scattering of light by molecules
Que- Choose the most appropriate answer: Sir CV Raman was awarded Noble Prize for his work connected with which of the following phenomenon of radiation?
a. Scattering
b. Diffraction
c. Interference
d. Polarization
Answer- Scattering
Que- Which of the following is/are part of the Classical Physics?
a. Optics
b. Thermodynamics
c. Both a and b
d. None
Answer- Both a and b
Que- General purpose utility gloves are
a. For surgeries
b. For cleaning procedures
c. For handling tubes
d. All of the above
Answer- For cleaning procedures
Que- The theory of relativity is presented by which scientist
a. Albert Einstein
b. Isaac Newton
c. Stephen Hawking
d. Marie Curie
Answer- Albert Einstein
Que- The least penetrating power ray is
a. Gamma rays
b. Beta rays
c. Alpha rays
d. None of the above
Answer- Alpha rays
Que- Gamma rays are emissions that have
a. Charge but no mass
b. Neither mass nor charge
c. Both mass and charge
d. Mass but no charge
Answer- Neither mass nor charge
Que- In the gamma decay of a nucleus
a. The mass number of the nucleus changes whereas its atomic number does not change
b. The mass number of the nucleus does not change whereas its atomic number changes
c. Both the mass number and the atomic number of the nucleus change
d. Neither the mass number nor the atomic number of the nucleus changes
Answer- Neither the mass number nor the atomic number of the nucleus changes
Que- Who among the following developed the technology of underground nuclear explosion ?
a. Dr. Homi J. Bhabha
b. Dr. Vikram Sarabhai
c. Dr. Raja Ramanna
d. Dr. P. K. Iyengar
Answer- Dr. Homi J. Bhabha
Que- A radioactive substance does not undergo any change (in mass or charge) during
a. Gamma-emission
b. Oxidation
c. Alpha-emission
d. Beta-emission
Answer- Gamma-emission
Que- A thin oil film on a water surface appears coloured because of
a. Reflection
b. Interference
c. Diffraction
d. Polarization
Answer- Interference
Que- The blue colour of sky is due to
a. Reflection of sunlight
b. Refraction of sunlight
c. Scattering of shorter wavelengths of sunlight in the atmosphere
d. Scattering of longer wavelengths of sunlight in the atmosphere
Answer- Scattering of shorter wavelengths of sunlight in the atmosphere
Que- The phenomenon of light associated with the appearance of blue colour of the sky is
a. Interference
b. Reflection
c. Refraction
d. Scattering
Answer- Scattering
Que- The sky appears blue because of
a. Atmospheric water vapour
b. Scattering of light
c. Reflection on sea water
d. Emision of blue wavelength by the sun
Answer- Scattering of light
Que- Light scattering takes place in
a. Colloidal solutions
b. Acidic solutions
c. Electrolyte solutions
d. Basic solutions
Answer- Colloidal solutions
Que- The sharpness of a television image is termed as its
a. Clarity
b. Colour
c. Resolution
d. Graphics
Answer- Resolution
Que- Which of the following is the fastest communication channel?
a. Microwave
b. Optical fiber
c. Radio wave
d. All are operating at nearly the same propagation speed
Answer- Microwave