Science For You

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Science

Which instrument is used for measuring Humidity in air?
Spherometer

Which instrument is used for measuring the growth of plants?
Crescograph

Which instrument is used to measure the magnitude and the direction of magnetic field?
Magnetometer

Which instrument is used for measuring the velocity and finding the direction of the wind?
Anemometer

Which instrument is used for navigating ships?
Sextant

Which instrument is used for recording sound under water?
Hydrophone

Which instrument is used for converting sound?
Micrometer

Which instrument is used for Measuring relative humility of atmosphere?
Hygrometer

Which instrument is used to study the different absorption of light by a liquid?
Spectrophotometer

Which instrument is used for to measuring temperature changes?
Thermoscope

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Science

Which instrument is used for measuring temperature of human body?
Clinical Thermometer

Which instrument is used for measuring radiant heat?
Bolometer

Which instrument is used to compare the intensities of two sources of light?
Photometer

Which instrument is used in Land Surveying for measuring angels horizontally and vertically?
Theodolite

Which instrument is used for check up whether a cell is generating current or not?
Galvanometer

In an ordinary light bulb filament is made of
Tungsten

Who conducted the experiment that produced vacuum for the first time?
Blaise Pascal

Who discovered electricity in lightning?
Benjamin Franklin

The blue colour of the sky is due to
Refraction of light

Which is unit frequency?
Hertz

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Science

A mixture of which gases is used in the manufacture of electric bulbs?
Oxygen an Argon

The branch of Physics which deals with the measurement of light is called
Photometry

Who invented lift?
E.G Otis

What kind of mirror is used for view?
Convex mirror

Who invented radio?
Marconi

Which elementary particles are in equal mass?
Neutron and proton

Which of the flowing transformations of energy takes place in a microphone?
Sound into electrical energy

For which purpose a transformer is used?
Conversion of low voltage into high voltage and vice-versa

What does “Angstrom” measure?
Length of light waves used for

Which instrument is detecting and measuring small currents?
Galvanometer

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Science

The rod in the dry cell, which act as the positive terminal, is made of
Carbon

Which instrument is used for measuring solar radiations?
Pyrheliometer

Which instrument is used for precise measurement of refractive indices?
Spectrometer

Which is used for controlling the chain reaction in nuclear reactor?
Molecules of high energy

Who discovered the law of attraction and repulsion between electric charges?
Coulomb

The lightning conductor used for protection buildings from lightning is made of
Copper

By the use of which lens myopia be corrected?
Concave

Which particle is emitted by the filament of a vacuum tube?
Electrons

Which is used as a electrolyte in chromium plating?
Chromic acid solution

The transformer works on which principle?
Electro magnetic induction

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Science

The Indian scientist who put forward the theory of thermal ionization was
Meghanath Saha

The sound waves which can not heard by a human ear are called
Infrasonic and Ultra sonic sounds

Why is Tungsten used for the manufacture of the filament of an electric bulb?
Because it has a very high melting point

Newton’s Law of gravitation apples to
Both small and big bodies

The direction of the conventional current in a diode is
Plate to Cathode

The light of which colour has the longest wavelength?
Red

Which is the unit to measure supersonic speed?
Mac

Which is the unit of force?
Newton

How is energy produced in the sun?
By nuclear fusion

Which is the element without neutron?
Hydrogen

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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