Important Scientific Instruments and their usage Important Scientific Instruments and their usage


Important Scientific Instruments and their usageImportant Scientific Instruments and their usage



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  • Accumulator : It is used to store electrical energy
  • Altimeter : It measures altitudes and is used in aircraft.
  • Ammeter : It measures strength of electric current (in amperes).
  • Anemometer : It measures force and velocity of the wind.
  • Audiometer : It measures the intensity of sound.
  • Audiphones : It is used for improving the imperfect sense of hearing.
  • Barograph : It is used for continuous recording of atmospheric pressure.
  • Barometer : It measures atmospheric pressure.
  • Binocular : It is used to view distant objects
  • Bolometer : It measures heat radiation
  • Calorimeter : It measures the quantity of heat.
  • Carburettor : It is used in an internal combustion engine for charging the air with petrol vapor.
  • Cardiogram : It traces movements of the heart, recorded on a cardiograph.
  • Chronometer : It determines the longitude of a place kept the onboard ship.
  • Cinematography : It is an instrument used in cinema making to throw on screen and enlarged image of the photograph.
  • Colorimeter : An instrument for comparing intensities of color.
  • Commutator : An instrument to change or remove the direction of an electric current, in dynamo used to convert alternating current into direct current.
  • Cresco graph : It measures the growth in plants.
  • Cyclotron : A charged particle accelerator which can accelerate charged particles to high energies.
  • Dynamo : It converts mechanical energy into electrical energy
  • Dynamometer : It measures force, torque, and power
  • Electroscope : It detects the presence of an electric charge.
  • Endoscope : It examines internal parts of the body.
  • Eudiometer : A glass tube for measuring volume changes in chemical reactions between gases.
  • Fathometer : It measures the depth of the ocean.
  • Galvanometer : It measures the electric current of low magnitude.
  • Hydrometer : It measures the specific gravity of liquids.
  • Hydrophone : It measures sound under water.
  • Hygrometer : It measures humidity in the air.
  • Kymograph : It graphically records physiological movements (Blood pressure and heartbeat).
  • Lactometer : It determines the purity of milk.
  • Manometer : It measures the pressure of gases.
  • Mariner’s compass : It is an instrument used by the sailors to determine the direction.
  • Microphone : It converts the sound waves into electrical vibrations and to magnify the sound.
  • Microscope : It is used to obtain the magnified view of small objects.
  • Odometer : An instrument by which the distance covered by wheeled vehicles is measured.
  • Periscope : It is used to view objects above sea level (used in submarines)
  • Phonograph : An instrument for producing sound.
  • Photometer : The instrument compares the luminous intensity of the source of light
  • Potentiometer : It is used for comparing electromotive force of cells.
  • Pyrometer : It measures very high temperature.
  • Quartz Clock : A highly accurate clock used in astronomical observations and other precision work
  • Radar : Radio, angle, detection, and range is used to detect the direction and range of an approaching airplane by means of radio microwaves
  • Radiometer : It measures the emission of radiant energy.
  • Rain Gauge : An apparatus for recording rainfall at a particular place.
  • Rectifier : An instrument used for the conversion of AC into DC.
  • Refractometer : It measures refractive index.
  • Saccharimeter : It measures the amount of sugar in the solution.
  • Salinometer : It determines the salinity of solution.
  • Seismograph : It measures the intensity of earthquake shocks.
  • Sextant : This is used by navigators to find the latitude of a place by measuring the elevation above the horizon of the sun or another star.
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List of Father of Nation of Different Countries

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Afghanistan Ahmad Shah Durrani .
Argentina Don Jose de San Martin .
Australia Sir Henry Parkes .
Bahamas Sir Lynden Pindling .
Bangladesh Sheikh Mujibur Rahman .
Bolivia Simon Bolivar .
Brazil Dom Pedro I .
Burma /Myanmar Aung San .
Cambodia Norodom Sihanouk .
Chile Bernardo O'Higgins .
Colombia Simon Bolivar .
Croatia Ante Starcevic .
Cuba Carlos Manuel de Cespedes .
Dominican Republic Juan Pablo Duarte .
Ecuador Simon Bolivar .
Ghana Kwame Nkrumah .
Guyana Cheddi Jagan .
Haiti Jean-Jacques Dessalines .
India Mohandas Karam Chand Gandhi .
Indonesia Sukarno .
Iran Cyrus the Great .
Israel Theodor Herzl .
Kenya Jomo Kenyatta .
Kosovo Ibrahim Rugova .
Lithuania Jonas Basanavicius .
Macedon...

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കേരളത്തിലെ പ്രധാന പക്ഷി സങ്കേതങ്ങൾ ( The major bird sanctuaries in Kerala )

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അരിപ്പ  =തിരുവനന്തപുരം .
കടലുണ്ടി =മലപ്പുറം .
കുമരകം =കോട്ടയം .
ചൂളന്നൂർ = പാലക്കാട്‌ .
തട്ടേക്കാട്=ഏറണാകുളം .
മംഗളവനം =ഏറണാകുളം .
...

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Indian constitution borrowed from

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Britain .

Parliamentary government.
Rule of Law.
Legislative procedure.
Single citizenship.
Cabinet system.
Prerogative writs.
Parliamentary privileges .
Bicameralism.
Ireland .

Directive Principles of State Policy.
Nomination of members to RajyaSabha .
Method of election of president.
Unites States of America .

Impeachment of the president.
Functions of president and vice-president.
Removal of Supreme Court and High court judges.
Fundamental Rights.
Judicial review.
Independence of judiciary.
Preamble of the constitution.
Canada .

Federation with a strong Centre.
Vesting of residuary powers in the Centre .
Appointment of state governors by the Centre.
Advisory jurisdiction of the Supreme...

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