Science For You

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Science

Which non-metal conducts electricity?
Carbon

Which alloy is used for making permanent magnet?
Steel

Which gas is used in ice plants?
Ammonia

Which is the S.I. Unit of heat?
Calorie

Which poisonous gas produced when PVC is burned?
Dioxin

Who invented the calculating machine?
Blaise Pascal

What is a Femto second?
A Femto second is a millionth of billionth of second

What is “zero energy”?
The energy that exists in atom is zero energy

Who invented the pendulum of clock?
Galileo

Who invented the Cellophane?
J.Brander perger

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Science

Who invented the bicycle?
Kirk Patrick Macmillan

Which is the fourth state of matter?
Plasma

Who invented atomic bomb?
J.Robert Oppenheimer

What is the unit or audible frequency of sound for human beings?
From 20 hertz to 20000 hertz

Which is the first artificial element that man made?
Neptunium

Who made the first artificial element?
Macmillan and Ebelson

Who was the first to prove that atom can be broken?
Rutherford

What is the unit of electric charge?
Coulomb

Which apparatus regulates temperature automatically?
Thermostat


Which is the metal used in storage batteries?
Lead

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Science

Which gas is the cause of “Green house effect”?
Carbon dioxide

Who made the first atomic reactor?
Enrico Fermi

Who invented the bifocal lens?
Benjamin Franklin

Which instrument is used for measuring velocity and pressure of wind?
Anemometer

What is the use of an Electro Encephalograph?
To test the working of brain cells

Who invented adding machine?
Wihelm Schickard

Which is the unit of magnetic flux?
Weber

What is Venturi tube?
It is a device to measure flow of liquids and their pressure

Who invented photo electric effect?
Hertz

Who was the first chairman of Atomic Power Commission?
Homi J.Babha

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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