Electronics and Computers

No.QuestionAnswer01The unit of frequency isHertz02The unit of resistance isOhm03The device which makes or breaks a circuit isSwitch04The path of an electric current is known as aCircuit05Device which opposes the flow of electric current is known asResistor06Arc Lamp was invented byC.F.Brush07Television was invented byJ.L.Baird08Transistor was invented byJ.Bardeen,W.Shockley and W.Brattain09The unit of wavelength of light isAngstrom10A device which converts light into electricity is known asPhoto cell11Hertz was the first to discoverRadio waves12Marconi inventedRadio13In 1901,Marconi beamed a signal from Cornwall in England toNewfoundland14Thomas Edison was anAmerican inventor15A glass tube with two electrodes is called aDiode16Lee de Forest was anAmerican scientist17Lee de Forest discovered theTriode18Radio and television transmit signals usingElectromagnetic waves19To turn pictures into electrical signals,television Cameras rely onPhoto-electric effect20Transistor was invented in the year194821The first electronic components invented were theThermionic valves22Microchip was invented in the year195823Microchip was invented byJack Kilby24The microchip invented first was also the firstIntegrated circuit25Silicon and germanium are ideal examples ofSemi conductors26LED stands forLight Emitting Diode27The first computer was invented in the year183428The first computer was invented byCharles Babbage29The first computer invented was calledAnalytical Engine30In the present day electronic machines,computers function asArtificial brains31CAD meansComputer Aided Design32CPU stands forCentral Processing Unit33RAM stands forRandom Access Memory34J.J. Thomson was aBritish physicist35In 1897,J.J.Thomson discoveredElectrons36A device used for increasing the strength of electric signal is calledAmplifier37The height of a wave is calledAmplitude38An electron carries a chargeNegative39In a transistor,a base is theFilling in the semiconductor sandwich40The tube behind the screen in TVs and most computers is calledCathode Ray Tube41The force which makes an electric current is calledElectromotive Force42Device used for measuring small amounts of electric current is calledGalvanometer43Sound too low to be heard by humans is calledInfrasound44VDU stands forVisual Display Unit45One kilobyte is approximately1000 bytes46DOS stands forDisk Operating System47WORD STAR is a popularWord processing programme48WORD STAR was developed byMicro pro Company49PC stands forPersonal Computer50ALU stands forArithmetic Logic Unit51The VDU and Keyboard together form aTERMINAL52The speed of the dot matrix printers is measured by CPS which stands forcharacters per second53The speed of the line printers is measured by LPM which stands forLines per second54DBMS stands forDatabase Management System55IBM is a famous computer company.IBM stands forInternational Business Machines Corporation56ROM stands forRead Only Memory57The actual machine of the computer is commonly known asHardware58The programs run on the computer are commonly known asSoftware59All the output which is printed on paper is calledHard Copy60The number of pixels on a computer screen determines a screes'sResolution61A processor's speed is measured inMegahertz62A software that assists the computer in performing instructions,is called assystem software63CAM stands forComputer Aided Manufacturing64DPI stands forDots per Inch65DTP stands forDesk Top Publishing66EPROM stands forerasable and Programmable Read only Memory67A magnetic storage disk made out of a thin piece of plastic is calledFloppy Disk68A pictorial representation of the step by step sequence for solving a problem is known as aFlow Chart69A measure of storage capacity equal to one thousand megabytes is oneGigabyte70A variable whose value is accessible throughout the program is calledGlobal Variable71A huge,worldwide network of computers that communicate with each other,allowing global communications between users is known popularly known asInternet72KB stands forKilobyte73LAN stands forLocal Area Network74A printer which uses light to transfer the image to paper is theLaser Printer75Memory which retains all its contents even after the power is turned off is known asNon-Volatile Memory76The result that is generated by the computer after processing the information provided to it is known asOutput77Electronic mail is more popularly known asE-Mail78PILOT stands forProgrammed Inquiry Learning Or Teaching79PILOT was developed byDoug Engelbardt80IQL stands forInteractive Query Language81LOGO was developed byDr.seymour Papert82CAL stands forComputer Assisted Learning83APT stands forAutomatically Programmed Tooling84`C'language was invented byDennis M.Ritchie85Modula-2 was developed byNiklaus Wirth86Terminals that have their own memory are calledSmart terminals87The memory that needs electric power to sustain its contents is known asVolatile Memory88MOS stands forMetallic Oxide Semiconductors89Dvorak key board was designed byAugust Dvorak90A simple device which functions as a simpler alternative to the keyboard is theMouse91Automatic drawing input device is calledScanner92In the second generation computers,magnetic cores were used asMain Memory Devices93LCD stands forLiquid Crystal Display94RADAR stands forRadio Detection and Ranging95RADAR works on the principle ofEcho96software-in-Hardware modules are calledFirmware97A device by which any microcomputer can use ordinary television set for producing output is calledRF modulator98EDSAC stands forElectronic Delayed Storage Automatic Computer99EDVAC stands forElectronic Discrete Variable Automatic Computer100EDSAC was developed in the year1949101EDVAC was developed in the year1952102ENIAC stands forElectronic Numerical Integrator and Calculator103The most successful computing device in the ancient time wasAbacus104Use of some mechanism for the operation of a machine is known asAutomation105Radar contact with the moon was first made in1945106Radar contact with Venus was first made in1961107A system in which information is displayed on a television screen is known asVideo Text System108A modern means of communication in which the information is stored in a computer at a TV station is known asTeletext109Global communication became possible by usingSatellites110Morse code was invented bySamuel Morse111The code used in a teleprinter is theBaudot Code112Teleprinter exchange is popularly known asTelex113A device which converts sound waves into electrical waves is calledMicrophone114AVC stands forAutomatic Volume Control115The device used to measure wavelengths of radio waves isWavemeter116A hollow metallic tube used in place of wire in electric circuits carrying high frequency currents is calledWaveguide117An instrument used to measure the intensity of radiations is theRadiometer118An instrument used to measure electrical voltage is theVoltmeter119VTVM stands forVacuum Tube Volt Meter120A circuit which maintains a constant voltage is calledVoltage Stabilizer121SCR stands forSilicon Controlled Rectifier122A device used to increase or decrease electric voltageis called aTransformer123A magnetic tape that records both audio and video signals is called aVideo Tape124The first electronic calculator was manufactured in 1963 byBell Punch Company,USA125MASER stands forMicrowave Amplification by stimulated Emission of Radiation126A computer which can handle a large volume of numbers is called aNumber cruncher127POST stands forPower on Self Test128POST is a test carried out just after the computer has beenSwitched on129An index of the files stored on a disk is calledDirectory130CP/M stands forControl program for Microcomputers131CP/M was developed bydigital Research Inc.,USA132MVS stands forMultiple Virtual Storage Operating System133MVS is used inMainframe computers134The process of starting a computer is calledBooting135A group of four binary digits is called aNIBBLE136BPI stands forBit per Inch137A smart card is amultifunctional microprocessor138LIPS stands forLogical Inferences Per Second139A computerized machine is normally called aRobot140A robot is a machine directed by aComputer141A robot which resembles a human being is called anAndroid142PL/1 stands forProgramme Language-1143The language PL/1 has combined features ofCOBOL and FORTRAN144BASIC stands forBegineers All Purpose Symbolic Instruction Code145COBOL stands forCommon Busines Oriented Language146ALGOL stands forAlgorithmic Language147ALGOL was developed in the early 1960s inEurope148COBOL was first introduced in the year1961149FORTRAN stands forFormula Translation150FORTRAN was developed and introduced by IBM in the year1957151PL/1 was introduced in the 1960s byIBM152COMAL stands forCommon Algorithmic Language153BASIC was developed byJohn Kemeny and Thomas Kurtz154SNOBOL stands forString Oriented Symbolic Language155SNOBOL was developed in1962156LISP stands forList Processing Language157LISP was developed byJohn McCarthy158Loud speaker was invented byRice Kellogg159PROM stands forProgrammable Read Only Memory160Two types of RAM chips areDynamic,static161Data is fed into the computer by first converting it into