• facebook
  • whatsapp
  • telegram


Adding Machine
Adding Machine was invented by Blaise Pascal in 1642. Pascal is a France resident. An adding machine was a class of mechanical calculator, usually specialized for bookkeeping calculations. This was an adding machine that could perform additions and subtractions directly and multiplication and divisions by repetitions.



Aero plane
      The Wright brothers invented and flew the first airplane in 1903. The Wright brothers, Orville and Wilbur were two American brothers. An airplane or aero plane is a powered, fixed-wing aircraft that is propelled forward by thrust from a jet engine or propeller. Airplanes come in a variety of sizes, shapes, and wing configurations. The broad spectrum of uses for airplanes includes recreation, transportation of goods and people, military, and research. Commercial aviation is a massive industry involving the flying of tens of thousands of passengers daily on airliners. Most airplanes are flown by a pilot on board the aircraft, but some are designed to be remotely or computer-controlled.



Ball point pen
        Ball point pen was invented by Hungary scientist C.Biro in 1938. A ballpoint pen is also known as a "biro" and "ball pen". It is a pen that dispenses ink over a metal ball at its point, i.e. over a "ball point". The metal commonly used is steel, brass, or tungsten carbide.

    Barometer was invented by Italy scientist E.Torricelli in 1644. A barometer is a scientific instrument used in meteorology to measure atmospheric pressure. Pressure tendency can forecast short term changes in the weather. A barometer is kept stationary and measures subtle pressure changes caused by weather.


      Bicycle was invented by Scotland scientist K.Macmillan in 1839. Bicycles were introduced in the 19th century in Europe.


Bicycle Tyre
      Bicycle Tyre was inveBicycle Tyre:nted by Scotland scientist J.B.Dunlop in 1888.


Centigrade scale
     Centigrade scale was invented by France scientist A.Celcius in 1742. Centigrade scale was used to measure the temperature in weather. Centigrade scale was used in thermometers.


      Cinematograph was invented by USA scientist Thomas Alva Edison in 1891. A cinematograph is a motion picture film camera, which also serves as a film projector and printer.


    Computer was invented by Britain scientist “Charless Babbage” in 1834. A computer is a general-purpose device that can be programmed to carry out a set of arithmetic or logical operations automatically. Since a sequence of operations can be readily changed, the computer can solve more than one kind of problem.


Cine Camera
      Cine Camera was invented by Britain scientist Friese Greene in 1889. The cine-camera is a type of photographic camera which takes a rapid sequence of photographs on an image sensor or on a film.
In contrast to a still camera, which captures a single snapshot at a time, the movie camera takes a series of images; each image constitutes a "frame". This is accomplished through an intermittent mechanism. The frames are later played back in a movie projector at a specific speed, called the frame rate.


Diesel Engine
     Diesel engine was invented by Germany scientist Rudolf Diesel in 1892. The diesel engine is also known as “compression-ignition engine”. It is an internal combustion engine in which ignition of the fuel that has been injected into the combustion chamber is initiated by the high temperature which a gas achieves when greatly compressed.
This contrasts with spark-ignition engines such as a petrol engine or gas engine, which use a spark plug to ignite an air-fuel mixture.


    Dynamite was invented by Sweden scientist Alfred Nobel in 1867. Dynamite is an explosive material based on nitroglycerin, using diatomaceous earth or another adsorbent substance such as powdered shells or clay. Dynamites using organic materials as sorbents such as sawdust are less stable and such use has been generally discontinued.


    Dynamo was invented by England scientist Michael Faraday in 1831. A dynamo is an electrical generator that produces direct current with the use of a commutator. Dynamos were the first electrical generators capable of delivering power for industry, and the foundation upon which many other later electric-power conversion devices were based, including the electric motor, the alternating-current alternator, and the rotary converter.


Electric light
    Electric light was invented by USA scientist Thomas Alva Edison in 1879. An electric light is a device that produces visible light by the flow of electric current. It is the most common form of artificial lighting and is essential to modern society, providing interior lighting for buildings and exterior light for evening and nighttime activities. Before electric lighting became common in the early 20th century, people used candles, gas lights, oil lamps, and fires. Most electric lighting is powered by centrally generated electric power, but lighting may also be powered by mobile or standby electric generators or battery systems. Battery-powered lights, usually called "flashlights" or "torches", are used for portability and as backups when the main lights fail.


Electro Magnet
     Electro magnet was invented by England scientist W.Sturgeon in 1824. An electromagnet is a type of magnet in which the magnetic field is produced by an electric current. The magnetic field disappears when the current is turned off. Electromagnets usually consist of a large number of closely spaced turns of wire that create the magnetic field. The wire turns are often wound around a magnetic core made from a ferromagnetic or ferri magnetic material such as iron. The magnetic core concentrates the magnetic flux and makes a more powerful magnet.


Gram phone
      Gram Phone was invented by USA Scientist T.A.Edision in 1878. A gramophone record is an analog sound storage medium in the form of a flat polyvinyl chloride disc with an inscribed, modulated spiral groove.
The groove usually starts near the periphery and ends near the center of the disc. Phonograph records are generally described by their diameter in inches (12", 10", 7"), the rotational speed in RPM at which they are played (162⁄3, 331⁄3, 45, 78), and their time capacity resulting from a combination of those parameters their reproductive quality or level of fidelity, and the number of audio channels provided (mono, stereo, quad, etc.).


Jet Engine
      Jet engine was invented by England scientist Sir Frank Whittle in 1937. A jet engine is a reaction engine discharging a fast moving jet that generates thrust by jet propulsion in accordance with Newton's laws of motion.
This broad definition of jet engines includes turbojets, turbofans, rockets, ramjets, and pulse jets. In general, jet engines are combustion engines but non-combusting forms also exist. Jet engine used in power aircraft, cruise missiles and unmanned aerial vehicles. In the form of rocket engines they power fireworks, model rocketry, spaceflight, and military missiles.


Machine Gun
      Machine gun was invented by USA Scientist Richard Trevithick in 1861. A machine gun is a fully automatic mounted or portable firearm, usually designed to fire bullets in quick succession from an ammunition belt or magazine, typically at a rate of three to eighteen hundred rounds per minute.


Micro Phone
       Microphone was invented by USA scientist David Hughes in 1878. A microphone, colloquially mic or mike is an acoustic-to-electric transducer or sensor that converts sound into an electrical signal. Microphones are used in many applications such as telephones, hearing aids, public address systems for concert halls and public events, motion picture production, live and recorded audio engineering, two-way radios, megaphones, radio and television broadcasting, and in computers for recording voice, speech recognition, VoIP, and for non-acoustic purposes such as ultrasonic checking or knock sensors.


     Microscope was invented by Netherlands scientist Z.Jansen in 1590. A microscope is an instrument used to see objects that are too small for the naked eye. The science of investigating small objects using such an instrument is called microscopy. Microscopic means invisible to the eye unless aided by a microscope.


Printing Press
     Printing press was invented by Germany scientist J.Gutenberg in 1455. A printing press is a device for applying pressure to an inked surface resting upon a print medium, thereby transferring the ink. Typically used for texts, the invention of the printing press is widely regarded as one of the most influential events in the second millennium, ushering in the period of modernity.


    Refrigerator was invented by Britain scientist J.Harrison and A.Catlin in 1834. A refrigerator is a common household appliance that consists of a thermally insulated compartment and a heat pump that transfers heat from the inside of the fridge to its external environment so that the inside of the fridge is cooled to a temperature below the ambient temperature of the room. Refrigeration is an essential food storage technique in developed countries. The lower temperature lowers the reproduction rate of bacteria, so the refrigerator reduces the rate of spoilage.


     Radio was invented by England scientist G. Marconi in 1901. Radio is the radiation of electromagnetic signals through the atmosphere or free space. The biggest use of radio waves is to carry information, such as sound, by systematically modulating some property of the radiated waves, such as their amplitude, frequency, phase, or pulse width. When radio waves strike an electrical conductor, the oscillating fields induce an alternating current in the conductor. The information in the waves can be extracted and transformed back into its original form.


     Radar was invented by USA Scientist A.H.Taylor and L.C. Young in 1922. Radar is an object-detection system that uses radio waves to determine the range, altitude, direction, or speed of objects. It can be used to detect aircraft, ships, spacecraft, guided missiles, motor vehicles, weather formations, and terrain. The radar dish transmits pulses of radio waves or microwaves that bounce off any object in their path. The object returns a tiny part of the wave's energy to a dish or antenna that is usually located at the same site as the transmitter.


     Radium was invented by France scientist Marie and Pierre curie in 1898. Radium is a chemical element with symbol “Ra” and atomic number “88”. It is the sixth element in group 2 of the periodic table, also known as the alkaline earth metals. Pure radium is almost colorless, but it readily combines with nitrogen on exposure to air, forming a black surface layer. All isotopes of radium are highly radioactive, with the most stable isotope being radium-226, which has a half-life of 1600 years and decays into radon gas. When radium decays, ionizing radiation is a product, which can excite fluorescent chemicals and cause radio luminescence.


     Revolver was invented by USA scientist Samuel Colt in 1835. A revolver is a repeating firearm that has a revolving cylinder containing multiple chambers and at least one barrel for firing. The term "revolver" refers to a handgun, but other weapons may also have a revolving chamber. These include some models of grenade launchers, shotguns, and rifles.


     Shorthand was discovered by Britain scientist Sir Issac Pitman in 1837. Shorthand is an abbreviated symbolic writing method that increases speed and brevity of writing as compared to a normal method of writing a language.
The process of writing in shorthand is called stenography, from the Greek stenos and graphie. It has also been called brachygraphy, from Greek brachys and tachygraphy, from Greek tachys, depending on whether compression or speed of writing is the goal.


    Telephone was discovered by USA scientist Alexander Graham Bell in 1876. A telephone, or phone, is a telecommunications device that permits two or more users to conduct a conversation when they are too far apart to be heard directly.
A telephone converts sound, typically and most efficiently the human voice, into electronic signals suitable for transmission via cables or other transmission media over long distances, and replays such signals simultaneously in audible form to its user.


       Telescope was discovered by Netherlands scientist Hans Lippershey in 1608. A telescope is an instrument that aids in the observation of remote objects by collecting electromagnetic radiation. The first known practical telescopes were invented in the Netherlands at the beginning of the 17th century, using glass lenses. They found use in terrestrial applications and astronomy.


     Television was discovered by Scotland scientist John Logie Bared in 1926. A Television, commonly referred to as TV or Tele is a telecommunication medium used for transmitting sound with moving images in monochrome (black-and-white), color, or in three dimensions. It can refer to a television set, a television program, or the medium of television transmission. Television is a mass medium, for entertainment, advertising and news.


     Thermometer was discovered by Italy scientist Galileo Galilei in 1593. A thermometer is a device that measures temperature or a temperature gradient.
A thermometer has two important elements: the temperature sensor in which some physical change occurs with temperature, plus some means of converting this physical change into a numerical value.


      Transistor was invented by USA and UK Scientists Bardeen and Shockley respectively in 1949. A transistor is a semiconductor device used to amplify and switch electronic signals and electrical power. It is composed of semiconductor material with at least three terminals for connection to an external circuit. A voltage or current applied to one pair of the transistor's terminals changes the current through another pair of terminals.
Because the controlled (output) power can be higher than the controlling (input) power, a transistor can amplify a signal. Today, some transistors are packaged individually, but many more are found embedded in integrated circuits.


      Typewriter was invented by USA Scientist C.Sholes in 1868. A typewriter is a mechanical or electromechanical machine for writing in characters similar to those produced by printer's movable type by means of keyboard-operated types striking a ribbon to transfer ink or carbon impressions onto paper. Typically one character is printed on each key press. The machine prints characters by making ink impressions of type elements similar to the sorts used in movable type letterpress printing.


      Watch was invented by France scientist A.L. Breguet in 1791. A watch is a small timepiece intended to be carried or worn by a person. It is designed to keep working despite the motions caused by the person's activities. A wristwatch is designed to be worn on a wrist, attached by a watch strap or other type of bracelet. A pocket watch is designed for a person to carry in a pocket.


      X-Ray was invented by Germany scientist Wilhelm Roentgen in 1895. X-radiation is a form of electromagnetic radiation. Most X-rays have a wavelength ranging from 0.01 to 10 nanometers, corresponding to frequencies in the range 30 petahertz to 30 exahertz and energies in the range 100 eV to 100 keV. X-ray wavelengths are shorter than those of UV rays and typically longer than those of gamma rays.


Posted Date : 07-02-2021

గమనిక : ప్రతిభ.ఈనాడు.నెట్‌లో కనిపించే వ్యాపార ప్రకటనలు వివిధ దేశాల్లోని వ్యాపారులు, సంస్థల నుంచి వస్తాయి. మరి కొన్ని ప్రకటనలు పాఠకుల అభిరుచి మేరకు కృత్రిమ మేధస్సు సాంకేతికత సాయంతో ప్రదర్శితమవుతుంటాయి. ఆ ప్రకటనల్లోని ఉత్పత్తులను లేదా సేవలను పాఠకులు స్వయంగా విచారించుకొని, జాగ్రత్తగా పరిశీలించి కొనుక్కోవాలి లేదా వినియోగించుకోవాలి. వాటి నాణ్యత లేదా లోపాలతో ఈనాడు యాజమాన్యానికి ఎలాంటి సంబంధం లేదు. ఈ విషయంలో ఉత్తర ప్రత్యుత్తరాలకు, ఈ-మెయిల్స్ కి, ఇంకా ఇతర రూపాల్లో సమాచార మార్పిడికి తావు లేదు. ఫిర్యాదులు స్వీకరించడం కుదరదు. పాఠకులు గమనించి, సహకరించాలని మనవి.



Previous Papers


విద్యా ఉద్యోగ సమాచారం


Model Papers


లేటెస్ట్ నోటిఫికేష‌న్స్‌