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Physics Test - 2

  • 1.
    When a person walking in bright Sunlight enters a dark room, he is not able to see clearly for a little while because

    a 
    The eye muscles cannot immediately adjust the focal length of the eye lens
    b 
    The retina retains the bright images for some time and becomes momentarily insensitive
    c 
    The iris is unable to contract the pupil immediately
    d 
    The iris is unable to dilate the pupil immediately

    Explanation:
    Subject: 
    GENERAL SCIENCE
    0.00% users answered right
    Correct Answer: d
    Comment · 0 · 
  • 2.

    The swing of a spinning cricket ball in air can be explained on the basis of

    a 
    Sudden change in wind direction
    b 
    Buoyancy of air
    c 
    Turbulence caused by wind
    d 
    Bernoulli’s theorem
     

    Explanation:
    Subject: 
    GENERAL SCIENCE
    63.64% users answered right
    Correct Answer: d
    Comment · 0 · 
  • 3.
    Why two thin shirts can keep us warmer than a single thick shirt in winter?

    a 
    Two thin shirts become thicker so prevent transmission of heat
    b 
    Air layer between two shirts works as good conductor
    c 
    Air layer between two shirts behaves like insulating media
    d 
    No radiation of heat takes place

    Explanation:
    Subject: 
    GENERAL SCIENCE
    63.64% users answered right
    Correct Answer: c
    Comment · 0 · 
  • 4.
    What should a person on a freely rotating turn table do to decrease his (angular) speed?

    a 
    Bring his hands together
    b 
    Raise his hands up
    c 
    Spread his hands outwards
    d 
    Sit down with raised hands

    Explanation:
    Subject: 
    GENERAL SCIENCE
    22.22% users answered right
    Correct Answer: c
    Comment · 0 · 
  • 5.

    Which of the following celestial bodies contains abundant quantities of helium-3, a potential source of energy?

    a 
    Earth
    b 
    Moon
    c 
    Venus
    d 
    Saturn
     

    Explanation:
    Subject: 
    GENERAL SCIENCE
    10.00% users answered right
    Correct Answer: d
    Comment · 1 · 
  • 6.
    Spectacles used for viewing 3D films have

    a 
    Bifocal lens
    b 
    Convex lens
    c 
    Concave lens
    d 
    Polaroids

    Explanation:
    Subject: 
    GENERAL SCIENCE
    10.00% users answered right
    Correct Answer: d
    Comment · 0 · 
  • 7.
    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

    Explanation:
    Subject: 
    GENERAL SCIENCE
    40.00% users answered right
    Correct Answer: a
    Comment · 1 · 
  • 8.
    In severe winter, in cold countries water pipes burst because

    a 
    Water expands on freezing
    b 
    Contraction of water pipes
    c 
    High atmospheric pressure
    d 
    Combined effect of all the above three

    Explanation:
    Subject: 
    GENERAL SCIENCE
    27.27% users answered right
    Correct Answer: a
    Comment · 0 · 
  • 9.
    The density of a gas is maximum at

    a 
    Low temperature, low pressure
    b 
    Low temperature, high pressure
    c 
    High temperature, low pressure
    d 
    High temperature, High pressure

    Explanation:
    Subject: 
    GENERAL SCIENCE
    54.55% users answered right
    Correct Answer: b
    Comment · 0 · 
  • 10.
    The cause for the Tsunami, as deduced by the seismologists, is

    a 
    Gravitational pull of the moon
    b 
    Low pressure trough in the ocean
    c 
    Deformation of sea floor and vertical displacement of water
    d 
    Sudden change in the monsoon wind

    Explanation:
    Subject: 
    GENERAL SCIENCE
    54.55% users answered right
    Correct Answer: c
    Comment · 0 · 
  • 11.
    Which one of the following wavelengths of light is most effective in photosynthesis?

    a 
    Blue
    b 
    Green
    c 
    orange
    d 
    Yellow

    Explanation:
    Subject: 
    GENERAL SCIENCE
    18.18% users answered right
    Correct Answer: a
    Comment · 0 · 
  • 12.
    The spoon dropped by an astronaut in a satellite will

    a 
    Fall to the floor
    b 
    Remain stationary
    c 
    Continue to follow the motion of the satellite
    d 
    Move tangentially away

    Explanation:
    Subject: 
    GENERAL SCIENCE
    10.00% users answered right
    Correct Answer: c
    Comment · 0 · 
  • 13.
    When a body is taken from earth to moon

    a 
    Mass changes but weight remains same
    b 
    Weight changes but mass remains same
    c 
    Both weight and mass change
    d 
    Both weight and mass remains same

    Explanation:
    Subject: 
    GENERAL SCIENCE
    55.56% users answered right
    Correct Answer: b
    Comment · 0 · 
  • 14.
    Atomic power plant works on the principle of

    a 
    Fission
    b 
    Fusion
    c 
    Thermal combustion
    d 
    Combined effect of all the above three

    Explanation:
    Subject: 
    GENERAL SCIENCE
    30.00% users answered right
    Correct Answer: d
    Comment · 3 · 
  • 15.
    Which of the following is an example for cantilever beam?

    a 
    Diving board
    b 
    Bridge
    c 
    See-saw
    d 
    Common balance 

    Explanation:
    Subject: 
    GENERAL SCIENCE
    25.00% users answered right
    Correct Answer: b
    Comment · 6 · 
  • 16.
    A soap bubble shows colours when illuminated with  white light. This is due to

    a 
    Diffraction
    b 
    Polarisation
    c 
    Interference
    d 
    Reflection

    Explanation:
    Subject: 
    GENERAL SCIENCE
    22.22% users answered right
    Correct Answer: c
    Comment · 0 · 
  • 17.
    Which of the following liquids has the least density?

    a 
    Fresh water
    b 
    Salt water
    c 
    Petrol
    d 
    Mercury

    Explanation:
    Subject: 
    GENERAL SCIENCE
    12.50% users answered right
    Correct Answer: c
    Comment · 0 · 
  • 18.
    Which of the following principle is used to produce low-temperatures?

    a 
    super conductivity
    b 
    Joule-Kelvin effect
    c 
    Thermo-electric effect
    d 
    Adiabatic demagneti-sation

    Explanation:
    Subject: 
    GENERAL SCIENCE
    37.50% users answered right
    Correct Answer: d
    Comment · 0 · 
  • 19.
    A photo – electric cell converts

    a 
    mechanical energy to electric energy
    b 
    heat energy to mechanical energy 
    c 
    light energy to chemical energy
    d 
    light energy to electrical energy

    Explanation:
    Subject: 
    GENERAL SCIENCE
    62.50% users answered right
    Correct Answer: d
    Comment · 0 · 
  • 20.
    The propagation of sound waves in a gas involves

    a 
    adiabatic compression and rarefaction
    b 
    isothermal compression and rarefaction
    c 
    isochoric compression and rarefaction
    d 
    isobaric compression and rarefaction

    Explanation:
    Subject: 
    GENERAL SCIENCE
    14.29% users answered right
    Correct Answer: a
    Comment · 0 · 
  • 21.
    Which of the following is not a property of heavy water

    a 
    Boiling point of heavy water is lower than that or ordinary water
    b 
    Density of heavy water is higher than that of ordinary water
    c 
    Freezing point of heavy water is higher than that of ordinary water
    d 
    It produces corrosion

    Explanation:
    Subject: 
    GENERAL SCIENCE
    14.29% users answered right
    Correct Answer: a
    Comment · 0 · 
  • 22.
    If input frequency of a full wave rectifier be n, then output frequency would be

    a 
    b 
    n
    c 
    d 
    2n

    Explanation:
    Subject: 
    GENERAL SCIENCE
    28.57% users answered right
    Correct Answer: d
    Comment · 0 · 
  • 23.

    Heat transfer horizontally within the atmosphere is called

    a 
    Conduction
    b 
    Convection
    c 
    Absorption
    d 
    Advection
     

    Explanation:
    Subject: 
    GENERAL SCIENCE
    42.86% users answered right
    Correct Answer: b
    Comment · 1 · 
  • 24.
    Sea water can be purified by the process of

    a 
    Distillation
    b 
    Evaporation
    c 
    Filtration
    d 
    Fractional distillation

    Explanation:
    Subject: 
    GENERAL SCIENCE
    22.22% users answered right
    Correct Answer: a
    Comment · 0 · 
  • 25.

    The scientist who first sent electromagnetic waves to distant places is

    a 
    James Clerk Maxwell
    b 
    Heinrich Hertz
    c 
    Thomas Alva Edison
    d 
    John Logie Baird
     

    Explanation:
    Subject: 
    GENERAL SCIENCE
    50.00% users answered right
    Correct Answer: b
    Comment · 0 · 
  • 26.
    The centre of gravity of a sprinter during the race lies

    a 
    ahead of his feet
    b 
    behind his feet
    c 
    at the centre of the body
    d 
    to the left side of the body

    Explanation:
    Subject: 
    GENERAL SCIENCE
    14.29% users answered right
    Correct Answer: a
    Comment · 0 · 
  • 27.
    The period of revolution of a geo stationary satellite is

    a 
    365 days
    b 
    30 days
    c 
    24 hours
    d 
    changing continuously

    Explanation:
    Subject: 
    GENERAL SCIENCE
    28.57% users answered right
    Correct Answer: c
    Comment · 0 · 
  • 28.
    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

    Explanation:
    Subject: 
    GENERAL SCIENCE
    57.14% users answered right
    Correct Answer: d
    Comment · 0 · 
  • 29.
    Lens is made up of

    a 
    Pyrex glass
    b 
    Flint glass
    c 
    Ordinary glass
    d 
    Cobalt glass

    Explanation:
    Subject: 
    GENERAL SCIENCE
    14.29% users answered right
    Correct Answer: b
    Comment · 0 · 
  • 30.
    A new technology which provides the ability to create an artificial world and have people interact with it is called

    a 
    Televirtuality
    b 
    Virtual reality
    c 
    Alternate reality
    d 
    3-D reality

    Explanation:
    Subject: 
    GENERAL SCIENCE
    14.29% users answered right
    Correct Answer: b
    Comment · 0 · 
  • 31.
    Which one of the following determines the sharpness of image in a camera?

    a 
    The aperture
    b 
    The exposure time
    c 
    The focal length of the lens
    d 
    Size of the camera

    Explanation:
    Subject: 
    GENERAL SCIENCE
    42.86% users answered right
    Correct Answer: a
    Comment · 0 · 
  • 32.
    The distance between node and adjacent antinode is 30 cm. The wavelength is

    a 
    30 cm.
    b 
    90 cm.
    c 
    120 cm.
    d 
    60 cm.

    Explanation:
    Subject: 
    GENERAL SCIENCE
    14.29% users answered right
    Correct Answer: d
    Comment · 0 · 
  • 33.
    In a railway track, two rails are joined end with a gap in between them because

    a 
    steel can be saved
    b 
    accidents due to contraction in winter can be avoided
    c 
    air-gaps are necessary for bearing the weight of running train
    d 
    accidents due to expansion in summer can be avoided.

    Explanation:
    Subject: 
    GENERAL SCIENCE
    37.50% users answered right
    Correct Answer: d
    Comment · 0 · 
  • 34.

    After long periods of use, a grey spot develops on the inside of a bulb. This is because

    a 
    the tungsten filament evaporates and collects there
    b 
    the heat of the bulb scorches the glass at the top
    c 
    dust inside the bulb condenses on the top
    d 
    glass undergoes a change due to the heat
     

    Explanation:
    Subject: 
    GENERAL SCIENCE
    42.86% users answered right
    Correct Answer: a
    Comment · 0 · 
  • 35.
    A person wears spectates with concave lenses. It means that normally (when not using glasses), the image of distant objects is focussed in his eyes

    a 
    behind the retina
    b 
    in front of the retina
    c 
    on the retina
    d 
    on the blind spot

    Explanation:
    Subject: 
    GENERAL SCIENCE
    28.57% users answered right
    Correct Answer: b
    Comment · 0 · 
  • 36.
    What is the principle of a Life Jacket?

    a 
    It provides oxygen to a drowning person
    b 
    It increase the volume of the person to keep him afloat
    c 
    It decrease the volume of the person to keep him afloat
    d 
    The person can sit on it like a raft

    Explanation:
    Subject: 
    GENERAL SCIENCE
    28.57% users answered right
    Correct Answer: b
    Comment · 0 · 
  • 37.
    A sphere rolls down on two inclined planes of different angles but same height, it does so

    a 
    in the same time
    b 
    with the same speed
    c 
    in the same time with the same speed
    d 
    in the same time with the same kinetic energy

    Explanation:
    Subject: 
    GENERAL SCIENCE
    28.57% users answered right
    Correct Answer: b
    Comment · 0 · 
  • 38.
    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

    Explanation:
    Subject: 
    GENERAL SCIENCE
    28.57% users answered right
    Correct Answer: a
    Comment · 0 · 
  • 39.
    A vacuum cleaner works on the principle of pressure difference. On the moon it will

    a 
    work as efficiently as on the earth
    b 
    not work at all
    c 
    work with reduced efficiency
    d 
    work with increased efficiency

    Explanation:
    Subject: 
    GENERAL SCIENCE
    42.86% users answered right
    Correct Answer: b
    Comment · 0 · 
  • 40.
    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

    Explanation:
    Subject: 
    GENERAL SCIENCE
    42.86% users answered right
    Correct Answer: c
    Comment · 0 · 
  • 41.
    When a pail of water is swung in a vertical circle, the water does not fall out at the top of the loop when the speed is

    a 
    below a certain minimum value irrespective of amount of water in the pail
    b 
    above a certain minimum value irrespective of amount of water in the pail
    c 
    above a certain minimum value depending of amount of water in the pail
    d 
    below a certain minimum value depending of amount of water in the pail

    Explanation:
    Subject: 
    GENERAL SCIENCE
    28.57% users answered right
    Correct Answer: b
    Comment · 0 · 
  • 42.
    The magnifying power of an astronomical telescope can be decreased by

    a 
    decreasing the focal length of the eyepiece
    b 
    increasing the focal length of the eyepiece
    c 
    increasing the focal length of the objective
    d 
    None of these

    Explanation:
    Subject: 
    GENERAL SCIENCE
    28.57% users answered right
    Correct Answer: b
    Comment · 0 · 
  • 43.
    Necessary element of change in solar energy to electric energy

    a 
    Berillium
    b 
    Silicon
    c 
    Tantelum
    d 
    Pure Copper

    Explanation:
    Subject: 
    GENERAL SCIENCE
    50.00% users answered right
    Correct Answer: b
    Comment · 0 · 
  • 44.
    Which of the following events occurred first/

    a 
    Albert Einstein propounded the General  Theory of Relativity
    b 
    Max Planck unveiled the Quantum Theory
    c 
    Marconi first transmitted a wireless signal
    d 
    Madame Marie Curie became the first woman Nobel Prize winner.

    Explanation:
    Subject: 
    GENERAL SCIENCE
    28.57% users answered right
    Correct Answer: b
    Comment · 0 · 
  • 45.
    Damp clothes are dried in spin dryers by the action of

    a 
    centripetal forces
    b 
    centrifugal forces
    c 
    central forces
    d 
    non central forces

    Explanation:
    Subject: 
    GENERAL SCIENCE
    42.86% users answered right
    Correct Answer: b
    Comment · 0 · 
  • 46.
    An aircraft can perform aerobatic manoeuvres in a vertical loop because of

    a 
    gravity
    b 
    centripetal force
    c 
    weight
    d 
    centrifugal force

    Explanation:
    Subject: 
    GENERAL SCIENCE
    14.29% users answered right
    Correct Answer: a
    Comment · 0 · 
  • 47.
    To measure the speed of an approaching car a police officer shines

    a 
    light waves on it
    b 
    microwaves on it
    c 
    radio waves on it
    d 
    ultra high frequency waves on it

    Explanation:
    Subject: 
    GENERAL SCIENCE
    28.57% users answered right
    Correct Answer: c
    Comment · 0 · 
  • 48.
    Forged documents are detected by

    a 
    ultraviolet rays
    b 
    infra-red rays
    c 
    beta rays
    d 
    gamma rays

    Explanation:
    Subject: 
    GENERAL SCIENCE
    33.33% users answered right
    Correct Answer: a
    Comment · 0 · 
  • 49.
    Sprayer functions on

    a 
    Bernouli`s principle
    b 
    Archemede`s principle
    c 
    Pascal`s law
    d 
    Floatation principle

    Explanation:
    Subject: 
    GENERAL SCIENCE
    33.33% users answered right
    Correct Answer: a
    Comment · 0 · 
  • 50.
    Radio activity is due to

    a 
    unstable nucleus
    b 
    stable nucleus
    c 
    stable electronic configuration
    d 
    stable electronic configuration
    Explanation:
    Subject: 
    GENERAL SCIENCE
    42.86% users answered right
    Correct Answer: a
    Comment · 0