Science For You

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Science

Which is the instrument used to change Alternating Current (AC) into Direct Current(DC)?
Rectifier

What is the speed of sound in air?
340m/s

Which is the first instrument that man used?
Stone

Which is the alloy having the least metal?
Invar steel

What kind of lens is used in the eye defect, ‘Astigmatism”?
Cylindrical lens

Which is the gas filled in the electric bulb?
Argon

Which wave has the most wave length?
Radio wave

Who invented printing?
J.Guttenberg

Which light ray that has the capacity to cut metals?
Laser

What is the specific gravity of water?
1

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Science

Which is the instrument that is used to show that Archimedes principle is applicable to gases also?
Baroscope

What is the name of the cells that changes sunlight into electrical energy?
Photo voltaic cells

What is the unit of mass?
Kilogram

Which is the moving particle atom?
Electron

What type mirror used in the vehicles to see the vehicles from behind?
Convex

Which is the instrument to take photograph in mist and darkness?
Infra red Camera

What is the use of Kryometer?
For measuring very low temperature

Which device converts mechanical energy into electrical energy?
Dynamo

In which instrument microwaves were first produced?
Magnetron

Which is the electrolyte used for Nickel plating?
Nickel ammonium sulphate

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Science

Who made and activated the first Nuclear Reactor?
Enrico Fermi

Where is the biggest solar plant in the world?
California

Which is the medium in which refraction of light in the maximum?
Diamond

Name the Electrode that is connected to the negative pole of the battery?
Cathode

Which is the colour of light emitted by hydrogen discharge lamps?
Blue

The nucleus of which atom is equivalent of an alpha particle?
Helium

Which fuel is used in PURNIMA-1 Reactor?
Plutonium

Which metals are used in transistors?
Germanium, Silicon, Celinium

What is the full form of PURNIMA?
Plutonium Reactor for Neutronic Investigations in Multiplying Assemblies

Which was the first submarine that ran using nuclear power?
Nautilus

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Science

What are the stable atomic particles occurring in an atomic nucleus?
Proton and Neutron

What is “dead weight tonnage”(DWT)?
The weight of a ship including all the particles it carries

What is the use of Periscope?
To view the objects above the surface of water

What is the colour of the sky when viewed from the moon?
Black

Which branch of medicine proved that electricity helps the growth of bones?
Electro therapy

What are three basic colours?
Red, Blue, Green

Who formulated the theory that there are only three basic colours?
Thomas Young

What is the charge of a nucleus in an atom?
Positive

Which is the device that has used Pascal law?
Hydrolic Press

Who discovered the existence of nucleus in an atom?
Rutherford

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Science

What is the temperature equal to 273 degree Kelvin?
0 degree centigrade

Who was the first philosopher to use sundial?
Anaxy Mander

Which was the fuel used in the first atomic bomb?
Uranium-235

Deuterium is the natural isotope of which element?
Hydrogen

Which instrument is to measure the force of electric current?
Ammeter

What is the voltage in the domestic electricity supply line?
230 volts

What is the commercial unit of the electric charge?
K.W.h.

Who is the inventor of the atomic theory?
Democratis

What is the speed of light?
300000 Km/second

Who proved that light travels faster than sound?
Olace Romer

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Science

What is the use of a Hypsometer?
For measuring altitudes

In what from does the sound waves travel in air?
Longitudinal waves

Hydrogen bomb is based on which phenomenon?
Nuclear fusion

Which is the colour that absorb all light waves?
Black

Which metals used in solar battery?
Germanium, Silicon and Celinium

Who proved first that there is a medium of ether everywhere in the universe?
Aristotle

Which part of our body does radiation harms the most?
Marrow in the bone

Which is the colour in the center of a rain bow?
Green

Which is the liquid used in Volta cell?
Diluted Sulphuric acid

Name the scientist who invented that the gases in the atmosphere absorb heat coming from the sun?
Joseph Fourier

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Science

What is the distance between broad gauge railway tracks?
1.676 metre

What is the distance between metergauge railway tracks?
1 metre

Which is the metal that reflects the light rays most?
Aluminium

Who was the frist to create artificial vacuum?
Torry selli

Name the scientist who gave leadership to the first atom bomb experiment of India?
Dr.Raja Ramanna

Which is the isotope that is used to determine the antiquity of very old objects?
Carbon-14

How many degree Fahrenheit makes 0 degree centigrade?
32 degree F

What is the full form of NMR scanning?
Nuclear Magnetic Resonance Scanning

Who was the first to make electric magnet?
Willing Sturjor

Which was the first city destroyed by nuclear explosion?
Hiroshima