Que- Shock-absorbers are usually made of steel as it :
a. Is not brittle
b. Has lower elasticity
c. Has higher elasticity
d. Has no ductile property
Answer- Has higher elasticity
Que- The dimensional formula ML–1T–2 corresponds to
a. Modulus of elasticity
b. Viscosity
c. Moment of a force
d. Thrust
Answer- Modulus of elasticity
Que- Amount of water vapour (gaseous) in a given volume of air (cubic metre) is known as:
a. Mixing ratio
b. Relative humidity
c. Absolute humidity
d. Specific humidity
Answer- Absolute humidity
Que- The splitting of white light into its components is due to:
a. Reflection
b. Refraction
c. Transmission
d. Dispersion
Answer- Dispersion
Que- Which of the following is used to split white light into different colours ?
a. Glass slab
b. Convex lens
c. Concave lens
d. Prism
Answer- Prism
Que- What colour does blue and yellow make?
a. Green
b. Black
c. Red
d. White
Answer- Green
Que- Which colour has the highest frequency?
a. Violet
b. Red
c. Indigo
d. Green
Answer- Violet
Que- The splitting of different colours of light in a prism is :
a. Reflection of light
b. Disperson of light
c. Diffraction of light
d. Refraction of light
Answer- Disperson of light
Que- Who measured the velocity of light first ?
a. Galileo
b. Newton
c. Romer
d. Einstein
Answer- Romer
Que- Light houses are places with powerful lights to :
a. Guide and resolve traffic jams in crowded metro-cities during nights
b. Guide and help large crowds at religious gathering during nights
c. Indicate to the incoming warships, the location of a harbour during night
d. Guide and warn the ships coming from different directions in the ocean
Answer- Guide and warn the ships coming from different directions in the ocean
Que- It is dangerous to observe Solar eclipse with naked eyes because
a. Infrared radiations from sun burn our retina
b. Ultraviolet radiations from Sun burn our retina
c. All radiations from sun initiate chemical reactions in eyes
d. Cosmic rays reach eyes more during the eclipse
Answer- Ultraviolet radiations from Sun burn our retina
Que- Formation of shadows can be explained by
a. Rectilinear propagation of light
b. Reflection
c. Refraction
d. Total internal reflection
Answer- Rectilinear propagation of light
Que- The locomotion of insects to the source of light is called :
a. Phototropic
b. Hydrotropic
c. Phototactic
d. Thermotactic
Answer- Phototropic
Que- The wall of a dam is broader at the base
a. Because streamlining is required
b. To withstand pressure that increases with depth
c. To withstand pressure that increases in a horizontal plane
d. To withstand pressure that is increased with atmospheric pressure
Answer- To withstand pressure that increases with depth
Que- It is easy to burst a gas-filled balloon with a needle than with a nail. It is because
a. Nail is more longer than needle.
b. Nail exerts more pressure than needle on the balloon.
c. Needle exerts more pressure than nail on the balloon.
d. Gas is reactive with the needle.
Answer- Needle exerts more pressure than nail on the balloon.
Que- The force exerted on an object is 200 N and its mass is 100 kg. Find the acceleration of the object.
a. 2 m/s
b. 2 m
c. 2 m/sq.s
d. 2 s
Answer- 2 m/sq.s
Que- The spokes used in the wheel of a bicycle increase its
a. Moment of inertia
b. Velocity
c. Acceleration
d. Momentum
Answer- Moment of inertia
Que- It is difficult to cook rice
a. At the top of a mountain
b. At the sea level
c. Under a mine
d. Same anywhere
Answer- At the top of a mountain
Que- The sudden fall of atmospheric pressure indicates
a. Fair weather
b. Storm
c. Rain
d. Cold weather
Answer- Storm
Que- Hydraulic brakes in automobile work on
a. Poiseuille's principle
b. Pascal's principle
c. Archimedes' principle
d. Bernoulli's principle
Answer- Pascal's principle
Que- When the barometer reading dips suddenly, it is an indication of
a. Hot weather
b. Calm weather
c. Storm
d. Dry weather
Answer- Storm
Que- A storm is predicted if atmospheric pressure
a. Rises suddenly
b. Rises gradually
c. Falls suddenly
d. Falls gradually
Answer- Falls suddenly
Que- On which principle does the hydraulic lift works?
a. Newton's law
b. Pascal's law
c. Archimedes's law
d. Joule's law
Answer- Pascal's law
Que- Which of the following group of elements are diamagnetic?
a. Argon, copper, silver
b. Hydrogen, argon, copper
c. Oxygen, copper, silver
d. Hydrogen, oxygen, Argon
Answer- Argon, copper, silver
Que- At the Curie temperature, the ferromagnetic materials get converted into
a. Diamagnetic materials
b. Non-magnetic materials
c. Paramagnetic materials
d. None of the others
Answer- Paramagnetic materials
Que- In the process of magnetisation of a bar
a. The entire bulk of the bar gets magnetised
b. Only the surface of the bar gets magnetised
c. Only the ends of the bar get magnetised
d. Only some parts of the outer layers of the bar get magnetised
Answer- The entire bulk of the bar gets magnetised
Que- Magnetic domains normally occur in
a. Copper
b. Silver
c. Iron
d. All of the above
Answer- Iron
Que- A small piece of a substance is weakly attracted by a strong magnetic field. The substance is
a. Diamagnetic
b. Ferromagnetic
c. Paramagnetic
d. Non-magnetic
Answer- Paramagnetic
Que- Which of the following is not a form of Energy?
a. Heat
b. Sound
c. Motion
d. Pressure
Answer- Pressure
Que- Which of the following is the second largest source of global energy?
a. Fossil fuel
b. Nuclear Energy
c. Renewable Energy
d. None of these
Answer- Renewable Energy
Que- Which of the following is a renewable source of energy
a. Natural gas
b. Coal
c. Wind
d. Oil
Answer- Wind
Que- The energy that generates wind comes from what source?
a. Anemometers
b. Solar radiation
c. Ocean currents
d. None of the above
Answer- Solar radiation
Que- Solar energy is due to
a. Fusion reactions
b. Fission reactions
c. Combustion reactions
d. Chemical reactions
Answer- Fusion reactions
Que- The wavelength at which the peak of intensity of blackbody radiation occurs
a. Increases with increase in temperature
b. Decreases with increase in temperature
c. Is the same at all temperatures
d. Does not follow any pattern as temperature changes
Answer- Decreases with increase in temperature
Que- Which of the following principle is used to produce ''low-temperatures' ?
a. Super conductivity
b. Joule-Kelvin effect
c. Thermo-electric effect
d. Adiabatic demagnetisation
Answer- Adiabatic demagnetisation
Que- The first law of thermodynamics is simply the case of
a. Charle's law
b. Newton's law of cooling
c. The law of heat exchange
d. The law of conservation of energy
Answer- The law of conservation of energy
Que- The commonly used coolant in refrigerators is
a. Ammonia
b. Nitrogen
c. Freon
d. Oxygen
Answer- Freon
Que- Energy in reflected light :
a. Does not depends on the angle of incidence
b. Increases with the increase in angle
c. Decreases with the increase in angle of incidence
d. Becomes maximum for angle of incidence equal to 45°
Answer- Increases with the increase in angle
Que- In total internal reflection, the light travel from
a. Rarer to denser medium and it occurs with no loss of intensity
b. Denser to rarer medium and it occurs with no loss of intensity
c. Rarer to denser medium and it occurs with loss of intensity
d. Denser to rarer medium and it occurs with loss of intensity
Answer- Denser to rarer medium and it occurs with no loss of intensity
Que- Convex mirrors are used as a rear view mirror in motor cycles because
a. It forms real image
b. It forms erect (upright) image
c. It forms smaller image as compared with object
d. All of the above
Answer- It forms smaller image as compared with object
Que- A convex mirror of focal length f (in air) is immersed in a liquid (u=4/3). The focal length of the mirror in the liquid will be :
a. F
b. (4/3)f
c. (3/4)f
d. (7/3)f
Answer- F
Que- The phenomenon which causes mirage is
a. Interference
b. Diffraction
c. Polarisation
d. Total internal reflection
Answer- Total internal reflection
Que- Rear view mirror of car is convex or concave?
a. Convex
b. Concave
c. Both A & B
d. Can't be determined
Answer- Convex
Que- The reverse effect of X–ray emission is
a. Raman effect
b. Compton effect
c. Zeeman effect
d. Photoelectric
Answer- Photoelectric
Que- The term photon refers to
a. Light ray
b. Sub atomic particle
c. Radiation
d. None of the above
Answer- Sub atomic particle
Que- In a conductor
a. There is no conduction band
b. The forbidden energy gap is very wide
c. The forbidden energy gap is very narrow
d. The valence band and the conduction band overlap each other
Answer- The valence band and the conduction band overlap each other
Que- The unit of intensity of electric field is
a. N/c
b. N/m
c. J/c
d. Volt
Answer- N/c
Que- . . . . . . . . . exerts a force on anything that has an electric charge.
a. Electric field
b. Electrostatic force
c. Inductive field
d. All of the above
Answer- Electric field
Que- The phenomenon of change in direction of light when it passes from one medium to another is called
a. Propagation
b. Reflection
c. Refraction
d. Dispersion
Answer- Refraction
Que- The refractive index of a transparent medium is maximum for
a. Red light
b. Violet light
c. Yellow light
d. Green light
Answer- Violet light
Que- What type of lens is a magnifying glass?
a. Diverging
b. Spherical
c. Converging
d. Achromatic
Answer- Converging
Que- Which of the following is not caused by atmospheric refraction of light ?
a. Sun appearing red at sunset
b. Twinkling of stars at night
c. Sun appearing higher in the sky than it actually is
d. Sun becoming visible two or three minutes before actual sunrise
Answer- Sun appearing higher in the sky than it actually is
Que- Why does water tank appear shallower when viewed from the top?
a. Due to reflection
b. Due to refraction
c. Due to diffraction
d. Due to total internal reflection
Answer- Due to refraction
Que- Which of the following experiments analyzed the Fraunhofer lines of the solar spectrum?
a. Barkla's experiment on scattering of X-rays
b. Lamb-Rutherford experiment
c. Geiger and Marsdens experiment on scattering of alpha particles
d. Bunsen and Kirchhoff's experiment
Answer- Bunsen and Kirchhoff's experiment
Que- Erg cross Sec is the unit of
a. Angular momentum
b. Linear Momentum
c. Planck's constant
d. Energy
Answer- Planck's constant
Que- A dynamometer wattmeter can be used for
a. Only Direct Current
b. Only Active Current
c. Both A & B
d. None of the above
Answer- Both A & B
Que- The device which converts AC to DC is
a. Oscillator
b. Amplifier
c. Rectifier
d. None of these
Answer- Rectifier
Que- After removing two electrons from helium atom it become?
a. UV rays
b. Alpha particle
c. Gama particle
d. X rays
Answer- Alpha particle
Que- A nuclear reactor is said to have become 'critical' when
a. It stops due to malfunctioning
b. It starts emitting dangerous radioactive radiations
c. It is shut down to avoid explosion
d. It is ready to produce controlled energy
Answer- It is ready to produce controlled energy
Que- Nuclear reactors used to produce electricity are based on
a. Nuclear fission
b. Nuclear fusion
c. Cold fusion
d. Superconductivity
Answer- Nuclear fission
Que- The energy obtained from atoms is known as ________
a. Solar energy
b. Heat energy
c. Nuclear energy
d. Chemical energy
Answer- Nuclear energy
Que- When heated from 0 to 100oC volume of a given mass of water will :
a. Increase gradually
b. Decrease gradually
c. Increase and then will decrease
d. Decrease and then will increase
Answer- Decrease and then will increase
Que- When a bottle of perfume is opened in one corner of a room the smell spreads soon throughout the room. This is an example of
a. Surface tension
b. Capillarity
c. Viscosity
d. Diffusion
Answer- Diffusion
Que- Which of the following laws validates the statement that matter can neither be created nor destroyed ?
a. Law of conservation of energy
b. Le Chatelier's Principle
c. Law of conservation of mass
d. Law of osmosis
Answer- Law of conservation of mass
Que- The boiling point of liquids vary as
a. Pressure varies
b. Temperature varies
c. Volume varies
d. Density varies
Answer- Pressure varies
Que- The freezing point of fresh water is ________ .
a. 4°C
b. 3°C
c. 5°C
d. 0°C
Answer- 0°C
Que- Kirchoff's Voltage Law is known as
a. Conservation of Charge
b. Conservation Energy
c. Both
d. None of these
Answer- Conservation Energy
Que- Super conductors are substances that
a. Offer minimum resistance to flow of electric current
b. Conduct electricity at low temperature
c. Conduct electricity at high temperature
d. Offer high resistance to the flow of electric current
Answer- Offer minimum resistance to flow of electric current
Que- A galvanometer can be converted to a voltmeter by connecting
a. A high resistance in parallel
b. A high resistance in series
c. A low resistance in series
d. A low resistance in parallel
Answer- A high resistance in series
Que- Certain substances loose their electrical resistance completely at super low temperature. Such substances are called.
a. Superconductors
b. Semi conductors
c. Dielectrics
d. Perfect conductors
Answer- Superconductors
Que- Speed of sound in air is unaffected by change in
a. Pressure
b. Humidity
c. Temperature
d. Volume
Answer- Pressure
Que- RADAR is used for
a. Detecting and locating the position of objects such as Aeroplanes
b. Locating submerged submarines
c. Locating geostationary satellites
d. Receiving a signals in a radio receiver
Answer- Detecting and locating the position of objects such as Aeroplanes
Que- What is the minimum distance (in metres) required to hear an echo?
a. 10
b. 13
c. 17
d. 21
Answer- 17
Que- Sound travels fastest in
a. Vacuum
b. Air
c. Glass
d. Water
Answer- Glass
Que- Which among the following determines the pitch of a sound?
a. Amplitude
b. Frequency
c. Loudness
d. Wavelength
Answer- Frequency
Que- Heat from the Sun reaches the Earth by
a. Reflection
b. Conduction
c. Radiation
d. Convection
Answer- Radiation
Que- Heat transfer by conduction occurs when molecules
a. Collide
b. Combine
c. Heated
d. None of the above
Answer- Collide
Que- A body absorbs heat most if it is
a. Black and rough
b. Black and smooth
c. White and rough
d. White and smooth
Answer- Black and rough
Que- A black body can absorb radiations of :
a. Lower wavelengths only
b. Intermediate wavelengths only
c. Higher wavelengths only
d. All wavelengths
Answer- All wavelengths
Que- The cover of a solar cooker is made of glass because
a. It absorbs sun's rays
b. It reflects sun's rays
c. It retains the heat inside by the green house effect
d. It rediates heat better than metals
Answer- It retains the heat inside by the green house effect
Que- For which of the following substances, the resistance decreases with increase in temperature?
a. Pure silicon
b. Copper
c. Nichrome
d. Platinum
Answer- Nichrome
Que- The S.I. unit of electric charge is :
a. Ampere
b. Coulomb
c. E.s.u
d. Kelvin
Answer- Coulomb
Que- Indicate the false statement about the resistance of a wire
a. It depends on material of wire
b. It is directly proportional to the length of wire
c. It is directly proportional to the area of cross-section of wire
d. Resistance of metallic wire increases with increase in temperature
Answer- It is directly proportional to the area of cross-section of wire
Que- The magnitude of current flowing between two end points of a conductor is proportional to the potential difference between them and is called as:
a. Avogadro's law
b. Rault's law
c. Ohms law
d. Faraday's law
Answer- Ohms law
Que- What is the SI unit of electric current?
a. Newton
b. Joule
c. Ampere
d. Watt
Answer- Ampere
Que- As we go from Equator to North pole the value of ''g', the acceleration due to gravity
a. Remains the same
b. Decreases
c. Increases
d. None of the above
Answer- Increases
Que- Speed in a given direction is called
a. Velocity
b. Torque
c. Acceleration
d. Displacement
Answer- Velocity
Que- For a body moving with uniform acceleration its final velocity equals ________
a. Average velocity - initial velocity
b. 2 x average velocity - initial velocity
c. 2 x average velocity + initial velocity
d. Average velocity + initial velocity
Answer- 2 x average velocity - initial velocity
Que- A car accelerates uniformly from 18 kmph to 72 kmph in 5 s. The acceleration of the car (in m/s2) is:
a. 3
b. 5
c. 6
d. 7
Answer- 3
Que- In ________ motion of a body its velocity varies with time.
a. Uniform
b. Linear
c. Equilibrium
d. Non-uniform
Answer- Non-uniform
Que- Which one of the following is the correct sequence of passage of light in a compound microscope?
a. Condenser -Objective lens -Eye -piece -Body tube
b. Objective lens -Condenser -Body tube -Eye piece
c. Condenser -Objective lens -Body tube -Eyepiece
d. Eyepiece -Objective lens -Body tube -Mirror
Answer- Condenser -Objective lens -Body tube -Eyepiece
Que- In a Cinema hall, the distance between the projector and the screen is increased by 2%. Then the intensity of illumination on the screen is
a. Decreased by 2%
b. Decreased by 4%
c. Increased by 2%
d. Increased by 4%
Answer- Decreased by 4%
Que- A simple microscope consists of :
a. A short focus convex lens
b. A long focus convex lens
c. A short focus concave lens
d. A long focus concave lens
Answer- A short focus convex lens
Que- Person who is colourblind cannot distinguish between
a. Black and yellow
b. Red and green
c. Yellow and white
d. Green and blue
Answer- Red and green
Que- Fiber optics cable used in communication, works on the principle of
a. Regular reflection of light
b. Diffuse reflection of light
c. Refraction of light
d. Total internal reflection of light
Answer- Total internal reflection of light
Que- Where do the electrical charges reside in a charged conductor?
a. At the core
b. Throughout the body
c. Depended upon the nature of the body
d. Outer surface of the body
Answer- Outer surface of the body
Que- The strength of an electromagnet can be increased by
a. Increasing the length of the coiled wire
b. Increasing current supply
c. Increasing the number of turns
d. All of the above
Answer- All of the above
Que- The unit of Planck's constant is
a. Js
b. Js–2
c. J/s
d. Js2
Answer- Js
Que- When a vehicle passes, TV reception gets distorted. This is because
a. Metal reflects radiowaves
b. Spark plug creates electromagnetic disturbances
c. Vehicle pollution affects the performance of the TV components
d. Modern vehicles use electroignition system
Answer- Spark plug creates electromagnetic disturbances
Que- The unit of magnetic permeability is
a. Henry/meter
b. Henry
c. Weber
d. Weber/meter
Answer- Henry/meter