Electronics Reviewer 3 (FINAL)

ECE Board Exam Reviewer: ELECTRONICS

1.

ThecollectorcurrentissimplyBetatimesthe_____. a.

Basecurrent 

b. Alpha 2.

Part 3

c.

Gate current

d.

Emitter current

Whentheinputsignalisappliedtothebaseandtheoutputisobtainedatthecollector,whatisthetransistor configurationwhereemitteractsasthecommon? a.

Common-collector 

b. Common-emitter  3.

d.

None of the above

Thetransistorconfigurationcommon-baseandcommon-emitterhavethesameoutputterminalat? a.

Drain

b. Base 4.

c.Common-base c. Common-base

c.

Source

d.

Collector 

Whenalphaisapproximatelyequalto1,itisassumedthatthe_____issosmallthatitcanbeignoredto computetheoperatingpoint. a.

Emitter current

b. Collector current 5.

Basecurrent 

d.

None of the above

Itisatwoterminaldevicereferredsometimesashot-carrierdiodeorsurface-barrierdiode. a.

Photodiode

b. Transistor 6.

c.

c. Schottkydiode d.

Varactor diode

Themaximumcurrent(rms)andpower(gate)ratingsforcommerciallyavailable_____areabout3Aand0.1W, respectively. a.

D ia c

b. LASCR 7.

c.

Triac

d.

Shockley diode

ItisadevicethatcontainsbothaninfraredLEDandaphotodetectorsuchassilicondiode,transistor,Darlington pair,orSCR. a.

Optoisolators

b. Thermistor 8.

Photodiode

d.

SCR

Thesecondaryvoltageofa_____transformerislowerthanprimaryvoltage. Rectifiers

c.

Step-down

b. Power supply

d.

Step-up

c.

Breakover

d.

Crowbarring

c.

Thermal

a.

9.

c.

AnRCsnubberprotectsanSCRagainst______. a.

Supply overvoltages

b. Falsetriggering 10. Whichhasthegreatestholdingstrength? a.

Electric

b. Pneumatic

d. Hydraulic 

11. Itisknownasthecommon-emitterforwardamplificationfactor. a.

Gamma-ratio

Beta-ratio   b. Beta-ratio

c.

Alpha-ratio

d.

None of the above

12. Amodulationtechniquethatgeneratesvariable-widthpulsestorepresenttheamplitudeofananaloginput signal. a.

Switching power supply

b. Boost regulators

c.

Buck converters

d.

Pulsewithmodulation

13. Buckconverterhascharacteristicwheretheoutputvoltageisalways_____thantheinputvoltage. a.

Equal

b. Greater

c.

Lower 

d.

Higher

14. Forhigh-speedintegratedcircuits,whichsemiconductormaterialgivenisbesttobeused? a.

Silicon

b. Galliumarsenide

c.

Germanium

d.

Gallium phosphide

15. Therestrictionofcertaindiscreteenergylevelsinasemiconductormaterialcanbepredictedgenerallybyusing? a.

Bohrmodel 

b. Lenz’s law

c.

Bode plot

d.

Gauss law

16. Inapplicationswhereahightorqueisneededduringstarting,thismotorispreferable_____. a.

DC shunt

b. Stepper motor

c.

AC motor

d.

DCseries

17. WhenVGGsuppliesthegateofanN-channelMOSFETwithapositivevoltage,thedeviceisoperatinginthe  _____mode. a.

Depletion

c.

Both A & B

b. Enhancement 

d.

None of the above

18. AtypeofMOSFETwhichhasadvantagesofveryhighinputimpedance,fastswitchingspeeds,andlowoperating powerlevelsanditisveryusefulinlogiccircuits. a.

V MO S

b. MESFET

c.

CMOS

d.

JFET

19. Thedraincurrentofanenhancement-typeMOSFETis0mAwhenthevaluesofV a.

Cut-off frequency

b. Thresholdlevel 

c.

A&B

d.

None of the above

GSlessthanthe_____.

20. Averypopularconnectionoftwobipolarjunctiontransistorsforoperationasone‘’superbeta’’transistor a.

Cascode

c.

Feedback Pair

Darlington on b. Darlingt

d.

None of the above

21. TheacanalysisofofJFETsanddepletion-typeMOSFETSis_____. a.

difficult

b. same

c.

different

d.

none of the above

22. Thereisno_____betweentheinputandoutputforthesource-followerandcommon-gateconfigurations. a.

Current

b. Power

c.

Voltage

d.

Phaseshift 

23. WhentheV GSisone-halfthe_____value,g misone-halfthemaximumvalue. Power

c.

Pinch-off 

b. Impedance

d.

None of the above

a.

24. Whichofthefollowingcharacterizesinductance? a.

Tends to oppose dc

b. Tendstoopposechangesincurrent

c.

Tends to oppose changes in voltage

d.

Opposes all frequencies equally

25. Permeabilityisthe_____. a.

Powerfoundintheelectromagnet

c.Powerfoundinthetransformer

b.

Power found in the magnetic field

d. Easewithwhichmetalsmaybemagnetized/demagnetized 

26. Ifthesecondaryofatransformerissteppeddown,theprimarywillhave a.

Less turns

b. Twice as many turns

c.

Half as many turns

d.

Moreturns

27. Powertransformersareusuallyratedin_____. a.

kwh

b. kw c.

kva

d. ampere-turn 28. Whattypeoftransformerisusedtoprotecttechniciansfromdeadlyelectricalshock? Isolationtransformer 

c.

Step-up transformer

b. Absorber transformer

d.

Step-down transformer

a.

29. Astep-uptransformer_____. a.

Decreasesvoltageandamperage

b. Raisesvoltageandamperage c.

Raisesvoltageanddecreasesamperage

d. Decreasesvoltageandincreasesamperage 30. Whatconditionexistsiftheanodeandcathodeofacellareconnectedtogetherwithoutaload? a.

Shortcircuit 

b. Overload

c.

Grounded circuit

d.

No load

31.  _____referstothemajoritycarrierinN-typesemiconductor. a.

hole

b. positive ion

c.

negative ion

d.

electron

32. ThebaseSIunitofluminousintensityis a.

Lux

c.

Lambert

b. Lumen

d.

Candela

33. Whatphenomenoninelectronicsdoesanavalanchebreakdownprimarilydependent? a.

Doping

b. Collision

c.

Ionization

d.

Recombination

34. Whichistheprincipalcharacteristicofavaractordiode? a.

IthasaveryhighPIV

b. Ithasanegativeregion c.

Itsinternalcapacitancevarieswiththeappliedvoltage

d. Ithasaconstantvoltageunderconditionsofvaryingcurrent. 35.  _____istheregioninatransistorthatisheavilydoped. a.

Collector

b. Ground

c.

Emitter 

d.

Base

36. Thetermcut-offforatransistorrefersto_____. a.

Thetransistorisatitsoperatingpoint

b. Nocurrentflowfromemittertocollector c.

Maximumcurrentflowfromemittertocollector

d. Thereisnobasecurrent 37. Atransistoractsas_____whensaturated. a.

Open circuit

b. Very low resistance

c.

Veryhighresistance

d.

Variable resistance

c.

Voltagedivider 

d.

Voltage feedback

38. Whatisthemoststabletypeofbiasing? a.

Current feedback

b. Fixed bias

39. Thetypeofbiasusedwhereonlymoderatechangesinambienttemperatureareexpected? a.

Combination bias

b. Fixedbias

c.

Self-bias

d.

Limited bias

40. Whichclassofamplifierhasthehighestlinearityandleastdistortion? a.

ClassA

b. Class B

c.

Class C

d.

Class D

41. Theoutputresistanceinacommon-baseamplifieris_____. a.

Zero

c.

Low

b. Medium

d.

High

42. InaMOSFET,theprocessofcreatingachannelorincreasingtheconductivityofthechannelbytheadditionof chargecarriersiscalled_____. a.

Inducement

b. Enhancement

c.

Improvement

d.

Balancing

43. Whennegativefeedbackisappliedtoanamplifier,itsvoltagegain a.

Is increased

b. Isdecreased 

c.

Remains the same

d.

Becomes zero

44. Thevoltagebetweentheinputterminalsofanidealop-ampis_____. Very small

c.

 Zero

b. Very large

d.

Equal to the input voltage

a.

45.  _____istheprogressivedecaywithtimeintheamplitudeofthefreeoscillationinacircuit. a.

Decrement

b. Pulse decay in time

c.

Damping

d.

Transient

c.

Detector

d.

Product detector

46. Whatistheoscillatorofaradarreceiver? a.

Klystronoscillator

b. Hartley oscillator

47.  _____ is the property of a crystal by which mechanical forces produce electrical charges and, conversely, electricalchargesproducemechanicalforces a.

Damping

b. Flywheel effect

c.

Doppler effect

d.

Piezoelectric effect

48. Asysteminwhichtheprecisemovementofalargeloadiscontrolledbyarelativelyweaksignal. a.

Hydraulic

b. Electric

c.

Servo

d.

Synchro

49. The_____aretwoofthemostcommonmechanicalconfigurationsofindustrialrobots. a.

Spherical and pneumatic

b. Spherical and hydraulic

c.

Cylindrical and hydraulic

d.

 Articulatedarmandcylindrical 

c.

Isaac Newton

d.

JJ Thomson

50. Whodevelopedresistanceweldingin1886? a.

Isaac Asimov

b. ElihuThomson

51.Whatdoyoucalltherationbetweentheintensityofmagnetizationproducedinasubstance,tothesourceof themagnetizingforce. a. magnetic reluctivity

c. magnetic resisitivity

b. magnetic conductivity

d.magneticsusceptibility

52.Coerciveforceistypicallyexpressedin a.oersteds

c. gilberts

b. Maxwell

d. gauss

53.Thetransferofenergyfromonecircuittoanothercircuitbyelectromagneticinductioniscalled a. transformation

c. coupling action

b. matching action

d.transformeraction

54._________istheunitofreluctance. a. Maxwell

c. Weber

b.At/Wb

d. Gauss

55.Anatomthatcontains6protonsand5electronshaswhatelectricalcharge? a. positive

b. negative

c. intermediate

d. neutral

56.Athreeterminalresistorwithoneormoreslidingcontactswhichfunctionsasanadjustablevoltagedivider. a. rheostat

c. bleeder resistor

b.potentiometer 

d. voltage divider

57.Whenresistorsareconnectedinseries,whathappens? a. Nothing

c. the tolerance decreased

b.theeffectiveincreasedisincreased 

d. the effective resistance is decreased

58.Ifthebandsonaresistorarered,red,orangesilver,whatistheresistancevalue? a. 220 ohms 5% tolerance

c. 223 ohms 10% tolerance

b.22,000ohms10%tolerance

d. 2200 ohms 20% tolerance

59.AstheAmericanWireGaugenumberincreases,thecrosssectionalareaofthewire_________. a. stays the same

c. increases

b.decreases

d. remains neutral

60.Resistorwithcoloredbandsinthebody a. adjustable resistor

c. wire wound resistor

b. variable resistor

d.carboncompoundresistor

61.Thetimeconstantofaninductivecircuitisdefinedastheratioof a. R/L

c. √R/L

b.L/R

d. √L/R

62.Theeffectofdoublingthenumberofturnsinacoilontheinductanceofthecoilis______ a.increasesinductance

c. no inductance

b. same inductance

d. reduces inductance

63.Whichofthefollowingfactorswillnoteffecttheinductanceofacoil? a. diameter of the coil

c. core material used

b. number of coil turns 

d.conductortensility

64.Thedirectionofthecounteremfproducedbyaninductorisexplainedby a.Lenz’sLaw 

c. Faraday’s Law

b. Gauss Law

d. Ampere’s Law

65.Thelefthandruleforgeneratorsstatesthatthethumbofthelefthandpointsinthedirectionofthemotionof the________. a. magnetic field

c. induced current

b. generator poles

d.conductor

66.Doublingthefrequencythatisappliedtothecapacitor a. doubles the reactance

b. reduces the reactance

c. cuts the reactance in half  

d. has no effect

67.A______isacomponentthatisconstructedyplacingathinsliceofquartzbetweentwometalplatesforthe purposeofprecisionoscillation. a.crystal 

c. chip

b. piezoelectric diode

d. cage

68.Theobjectiveofacapacitoristo________ a. Store AC Current

c. block AC current and pass DC current

b.blockDCcurrentandpassACcurrent

d. block AC current

69.Amagneticfieldisa/an_______field. a. electrostatic

c. energy

b. dielectric

d.force

70.Electrostaticlinesofforceradiatefromachargeparticlealongwhattypeoflines? a. curved lines 

c. orbital lines

c. elliptical lines

d.straightlines

71.Acircuitwithlittleornoresistanceiscalled_______ a. voltage drop

c.shortcircuit 

b. open circuit

d. infinite circuit

72.Whattypeofcircuitbreakercanbeoverriddeniftheoperatingmechanismisheldon? a. emergency

c. standard

c. trip free

d.nontripfree

73.Thisreferstothevoltageinducedintheconductormovinginamagneticfieldisproportionaltotherateatwhich theconductorcutsmagneticlinesofforce. a.Faraday’sLaw 

c. Fermat’s Law

b. Hall Effect

d. Wiegand Effect

74.Anelectromagneticwavewilltakeapaththatinvolvestheleasttraveltimewhenpropagatingbetweentwo points a. Seebeck Effect

c.Fermat’sPrinciple

b. Faraday’s Effect

d. Gauss principle

75.Thislawstatesthatchargesgenerateelectricfields. a.GaussLaw 

c. Faraday’s Law

c. Lenz Law

d. Amperes’Law

76.Accordingtothislaw“Theforceattractionorrepulsionbetweentwomagneticpolesisdirectlyproportionalto theirstrengths”. a. Newton’s Universal Law of Gravitation

c. Faraday’s Law

b.Coulomb’sFirstLaw

d. Coulomb’s Second Law

77.Theforceattractionorrepulsionbetweentwopolesisinverselyproportionaltothesquareofthedistance betweenthem. a. Faraday’s First Law

c. Newton’s first Law

b.Coulomb’sSecondLaw 

d. Asimov’s Second Law

78.Thevalueofsinewaveofvoltageorcurrentatoneparticularinstantoftime. a. average value

c. effective value

b. RMS value

d.instantaneousvalue

79.The_____ofanglethetaisthepowerfactor a. sine

c.cosine

b. tangent

d. cotangent

80.ThepowerdissipatedacrosstheresistanceinanACcircuit a. inactive power

c.realpower 

b. reactive power

d. apparent power

81.TheformfactorofDCis a. zero

c. unity

b. 0.5

d.infinite

82.Rustinelectricalwireconnectionswillresultto____________. a. conductance

c.resistance

b. voltage

d. inductance

83.Apowerfactorof1indicatesthatacircuitis a. purely reactive

c. purely XC

b. purely resisitive

d.purelyXL

84.__________isaparallelLCcircuit. a. Hartley Circuit

c. Static Circuit

b.Tankcircuit 

d. parallel resisting circuit

85.ThenetreactanceinaRLCcircuitis a. XL

c.

XC-XL

b. XL-XC

d.

XC

86.Holesactlike a. atoms

c. crystals

b. negative charges

d.positivecharges

87.Typesofimpuritiesinptypesemiconductorlikeboronandgallium a. covalent

c. bivalent

b. pentavalent

d.trivalent

88.Iftheloadresistancedecreasesinazenerregulator,thezenercurrent a.decreases b. increases

c. stays the same d. equals the source voltage divided by the series resistance

89.Thecapacitanceofavaractordiodeincreaseswhenthereversevoltageacrossit a. decreases

c. increases

b. breaks down

d.storescharges

90.Avalanchebreakdownisprimariliydependentonthephenomenonof a. doping

c.collision

b. recombination

d. ionization

91.A/an__________isadevicethathousesalightemitterandalightsensorinthesamepackage a. optpcoupler

c. oscillator

b. optoisolator

d.aorb

92.Whattypeofcouplingwouldbemostusefulforanaudioamplifierbetweenthefirstandsecondstage? a. impedance 

c.RC 

b. transformer

d. Resistor

93.TheprimarydifferencebetweenaPNPandNPNamplifier. a. Capacity

c. type of input

b. type of bias

d.polarityofsourcevoltage

94.Whenoperatedincutoffandsaturation,atransistoractslikea____ a.switch

c. linear amplifier

b. variable capacitor

d. variable resistor

95.Thecutoffregionoftransistorcharacteristiccurvesisusefulfor a.digitalswitchingapplications

c. filter applications

b. analog switching application

d. amplifier application

96.IfI cis50timeslargerthanI B,thenbetais a. 500

c. 0.02

d. 100

d.50

97.Iflinefrequencyof60Hz,theoutputfrequencyofahalfwaverectifieris_____ a. 30 Hz

c.60Hz

b. 120 Hz

d. 240 Hz

98.Ifnocurrentflowsthroughtheloadinabridgecircuit,thisiscalledabridge___________ a. leaky

c. critical

c. unstable

d.balanced

99.Thed’ArsonvalMeterisreallya/an a. DC voltmeter

c. AC ammeter

b. AC voltmeter

d.DCammeter 

100.Atriacbehavesliketwo a. diodes in series b. four layer diodesinparallel

c. resistor and one diode d.inverseparallelSCRsconnectedwithcommongate

101.Ifaloadresistanceis1kohm,astiffvoltagesourcehasaresistanceof a. Atleast10ohm b. Lessthan10ohm

c. Morethan100kohm d. Lessthan100kohm

102.TheTheveninvoltageisthesameasthe a. Shorted-loadvoltage b. Open-loadvoltage

c. Idealsourcevoltage d. Nortonvoltage

103.Anidealvoltagesourceandaninternalresistanceisanexampleofthe a. Idealapproximation b. Secondapproximation

c. Higherapproximation d. Exactmodel

104.Thevoltageoutofanidealvoltagesource a. Iszero b. Isconstant

c. Dependsonthevalueofloadresistance d. Dependsontheinternalresistance

105.Thevenin’stheoremreplacesacomplicatedcircuitfacingaloadbyan a. b.

Idealvoltagesourceandparallelresistor Idealcurrentsourceandparallel resistor 106.Norton’stheoremreplacesacomplicatedcircuitfacingaloadbyan a. b.

Idealvoltagesourceandparallelresistor Idealcurrentsourceandparallelresistor

c. d.

Idealvoltagesourceandseriesresistor Idealcurrentsourceandseriesresistor

c. d.

Idealvoltagesourceandseriesresistor Idealcurrentsourceandseriesresistor

c. d.

Hole Recombination

c. d.

Recommendation Thermalenergy

c) d)

3 4

c. d.

3 4

107.Eachvalenceelectroninanintrinsicsemiconductorestablishesa a. b.

Covalentbond Freeelectron

108.Themergingofafreeelectronandaholeiscalled a. b.

Covalentbonding Lifetime

109.Aconductorhashowmanytypesofflow? a) b)

1 2

110.Asemiconductorhashowmanytypesofflow? a. b.

1 2

111.Inanintrinsicsemiconductor,thenumberoffreeelectrons a. Equalsthenumberofholes b. Isgreaterthanthenumberofholes

c. Islessthanthenumberofholes d. Noneoftheabove

112.Thenumberoffreeelectronsandholesinanintrinsicsemiconductorincreaseswhenthetemperature a. Decreases b. Increases

c. Staysthesame d. Noneoftheabove

113.Diffusionoffreeelectronsacrossthejunctionofanunbiaseddiodeproduces a. Forwardbias b. Reversebias

c. Breakdown d. Thedepletionlayer

114.Thevoltagewhereavalancheoccursiscalledthe a. Barrierpotential b. Depletionlayer

c. Kneevoltage d. Breakdownvoltage

115.Surface-leakagecurrentispartofthe a. Forwardcurrent b. Forwardbreakdown

c. Reversecurrent d. Reversebreakdow

116.Inasilicondiodethereversecurrentisusually a. Verysmall b. Verylarge

c. Zero d. Inthebreakdownregion

117.Howmuchvoltageisthereacrossthesecondapproximationofasilicondiodewhenitisforwardbiased? a. 0 b. 0.3V

c. 0.7V d. 1V

118.Withafull-waverectifiedvoltageacrosstheloadresistor,loadcurrentflowsforwhatpartofacycle? a. 0degrees b. 90degrees

c. 180degrees d. 360degrees

119.Ifthefilteredloadcurrentis10mA,whichofthefollowinghasadiodecurrentof10mA? a. Half-waverectifier b. Full-waverectifier

c. Bridgerectifier d. Impossibletosay

120.Ifthesecondaryvoltageincreasesinabridgerectifierwithacapacitor-inputfilter,theloadvoltagewill a. Decrease b. Staythesame 121.Theloadvoltageisapproximatelyconstantwhenazenerdiodeis

c. Increase d. Noneofthese

a. Forward-biased b. Reverse-biased 122.Thevoltageacrossthezenerresistanceisusually

c. Operatinginthebreakdownregion d. Unbiased

a. Small b. Large

c. Measuredinvolts d. Subtractedfromthebreakdownvoltage

123.Whenthesourcevoltageincreasesinazenerregulator,whichofthesecurrentsremainsapproximatelyconstant? a. Seriescurrent b. Zenercurrent

c. Loadcurrent d. Totalcurrent

124.Aphotodiodeisnormally a. Forward-biased b. Reverse-biased

c. Neitherforward-norreverse-biased d. Emittinglight

125.Whenthelightincreases,thereverseminoritycarriercurrentinaphotodiode a. Decreases b. Increases

c. Isunaffected d. Reversesdirection

126.Thevaractorisusually a. Forward-biased b. Reverse-biased

c. Unbiased d. Operatedinthe breakdownregion

127.Mostoftheelectronsinthebaseofannpntransistorflow a. Outofthebaselead b. Intothecollector

c. Intoemitter d. Intothebasesupply

128.Inanormallybiasednpntransistor,theelectronsintheemitterhaveenoughenergytoovercomethebarrier potentialofthe a. Base-emitterjunction b. Base-collectorjunction

c. Collector-basejunction d. Recombinationpath

129.Whatisthemostimportantfactaboutthecollectorcurrent? a. Itismeasuredinmilliamperes. b. Itequalsthebasecurrentdividedby thecurrentgain.

c. Itissmall d. Itapproximatelyequalstheemitter current.

130.Thegraphofcurrentgainversuscollector-currentindicatesthatthecurrentgain a. Isconstant b. Variesslightly

c. Variessignificantly d. Equalsthecollectorcurrentdividedby thebasecurrent

131.ThreedifferentQpointsareshownonaloadline.TheupperQpointrepresentsthe a. Minimumcurrentgain b. Intermediatecurrentgain

c. Maximumcurrentgain d. Cutoffpoint

132.Foremitterbias,thevoltageattheemitteris0.7Vlessthanthe a. Basevoltage b. Emitter voltage

c. d.GroundVoltage d. Collectorvoltage

133.IftheemitterresistancedoublesinaVDBcircuit,thecollectorcurrentwill a. Double b. Dropinhalf

c. Remainthesame d. Increase

134.Theregulatorwiththehighestefficiencyisthe a. Shuntregulator b. Seriesregulator

c. Switchingregulator d. NOTA

135.Iftheloadisshorted,thepasstransistorhastheleastpowerdissipationwhentheregulatorhas a. Foldbacklimiting b. Lowefficiency

c. Bucktopology d. Ahighzenervoltage

136.Anadvantageofshuntregulationis a. Built-inshort-circuitprotection b. Lowpowerdissipationinthepass transistor

c. Highefficiency d. Littlewastedpower

137.Toturnonacurrentbooster,wecandriveitsbaseemitterterminalswiththevoltageacross a. Aloadresistor b. Azenerimpedance

c. Anothertransistor d.  Acurrent-sensingresistor 

138.Ifalinearthree-terminalICregulatorismorethanaoscillationsinsidetheICunlessyouuse a. Currentlimiting b.  Abypasscapacitorontheinputpin

c. Acouplingcapacitorontheoutputpin d. Aregulatedinputvoltage

139.Comparedtotherippleintoavoltageregulator,therippleoutofavoltageregulatoris a. Equalinvalue b. Muchlarger

c. Muchsmaller d. Impossibletodetermine

140.Thequantitythatremainsconstantinapulse-widthmodulatoris a. Pulsewidth b. Period

c. Dutycycle d. Space

141.Anoscillatoralwaysneedsanamplifierwith a. Positivefeedback b. Negativefeedback

c. Bothtypesoffeedback d. AnLCtankcircuit

142.Theop-ampintegratoruses a. Inductors b. TheMillereffect

c. Sinusoidalinputs d. Hysteresis

143.Ifpulsewidthdecreasesandtheperiodstaysthesame,thedutycycle a. Decreases b. Staysthesame

c. Increases d. Iszero

144.Theregionbetweenthepassbandandthestopbandiscalledthe a. Attenuation b. Center

c. Transition d. Ripple

145.Ifanopamphasonlyapositivesupplyvoltage,itsoutputcannot a. Benegative b. Bezero

c. Equalthesupplyvoltage d. Beaccoupled

146.Intheclassicthreeop-ampinstrumentationamplifier,thedifferentialvoltagegainisusuallyproducedbythe a. Firststage b. Secondstage

c. Mismatchedresistors d. Outputopamp

147.Theinputsignalforaninstrumentationamplifierusuallycomesfrom a. Aninvertingamplifier b. Atransducer

c. Adifferentialamplifier d.  AWheatstonebridge

148.Inanacamplifierusinganopampwithcouplingandbypasscapacitors,theoutputoffsetvoltageis a. Zero b. Minimum

c. Maximum d. Unchanged

150.Negativefeedbackdoesnotimprove a. Stabilityofvoltagegain b. Nonlineardistortioninlaterstages

c. Outputoffsetvoltage d. Powerbandwidth

151.Theinputimpedanceofacurrent-to-voltageconverteris a. Small b. Large

c. Ideallyzero d. Ideallyinfinite

152.Whenanopampisnotsaturated,thevoltagesatthenon-invertingandinvertinginputsare a.  Almostequal b. Muchdifferent

c. Equaltotheoutputvoltage d. Equalto+15V

153.Ifthefrequencyisgreaterthanthepowerbandwidth, a. Slew-ratedistortionoccurs b. Anormaloutputsignaloccurs 154.Theopen-loopcutofffrequencyofa741Ciscontrolledby a. Acouplingcapacitor b. Theoutputshortcircuitcurrent

c. Outputoffsetvoltageincreases d. Distortionmayoccur c. Thepowerbandwidth d.  Acompensatingcapacitor

155.TheinputimpedanceofaBIFETopampis a. Low b. Medium

c. High d. Extremelyhigh

156.Attheunity-gainfrequency,theopen-loopvoltagegainis a. 1 b. Amid

c. Zero d. Verylarge

157.Whatusuallycontrolstheopen-loopcutofffrequencyofanopamp? a. Stray-wiringcapacitance b. Base-emittercapacitance

c. Collector-basecapacitance d. Compensatingcapacitance

158.Withbothbasesgrounded,theonlyoffsetthatproducesanerroristhe a. Inputoffsetcurrent b. Inputbiascurrent

c. Inputoffsetvoltage d. NOTA

159.Whenthetwobasesaregroundedinadiffamp,thevoltageacrosseachemitterdiodeis a. Zero b. 0.7V 160.Thecommon-moderejectionratiois a. Verylow b. Oftenexpressedindecibels c. Equaltothevoltagegain

c. Thesame d. High d. Equaltothecommon-modevoltage gain

161.Thecommon-modevoltagegainis a. Smallerthanvoltagegain b. Equaltovoltagegain

c. Greaterthanvoltagegain d. Noneoftheabove

162.MonolithicICsare a. Formsofdiscretecircuits b. Onasinglechip

c.

Combinationsofthin-filmandthick-film circuits d. AlsocalledhybridICs 163.Ifyouwanttoimprovethehigh-frequencyresponseofanamplifier,whichofthesewouldyoutry? a. Decreasethecouplingcapacitances. b. Increasetheemitterbypasscapacitance.

c. d.

Shortenleadsasmuchaspossible. Increasethegeneratorresistance.

164.Atlowfrequencies,thecouplingcapacitorsproduceadecreasein a. Inputresistance b. Voltagegain

c. Generatorresistance d. Generatorvoltage

165.Anythyristorcanbeturnedoffwith a. Breakover b. Forward-biastriggering

c. Low-currentdropout d. Reverse-biastriggering

166.ASCRisusuallyturnedonby a. Breakover b.  Agatetrigger

c. Breakdown d. Holdingcurrent

167.Theminimumanodecurrentthatkeepsathyristorturnedoniscalledthe a. Holdingcurrent b. Triggercurrent

c. Breakovercurrent d. Low-currentdropout

168.Theminimuminputcurrentthatcanturnonathyristoriscalledthe a. Holdingcurrent b. Triggercurrent

c. Breakovercurrent d. Low-currentdropout

169.Athyristorcanbeusedas a. Aresistor b. Anamplifier

c.  Aswitch d. Apowersource

170.Mostsmall-signalE-MOSFETsarefoundin a. Heavy-currentapplications b. Discretecircuits

c. Diskdrives d. Integratedcircuits

171.ThemainadvantageofCMOSisits a. Highpowerrating b. Small-signaloperation

c. Switchingcapability d. Lowpowerconsumption

172.Withactive-loadswitching,theupperE-MOSFETisa a. Two-terminaldevice b. Three-terminaldevice

c. Switch d. Smallresistance

173.Anordinaryresistorisanexampleof a. Athree-terminaldevice b. Anactiveload

c.  Apassiveload d. Aswitchingdevice

174.Whichofthesemayappearonthedatasheetofanenhancement-modeMOSFET? a. VGS(th) b. ID(on)

c. VGS(on) d.  Alloftheabove

175.ThevoltagethatturnsonanEMOSdeviceisthe a. Gate-sourcecutoffvoltage b. Pinchoffvoltage

c. Thresholdvoltage d. Kneevoltage

176.Transconductanceindicateshoweffectivelytheinputvoltagecontrolsthe a. Voltagegain b. Inputresistance

c. Supplyvoltage d. Outputcurrent

177.Transconductanceismeasuredin a. Ohms b. Amperes

c. Volts d. MhosorSiemens

178.Whenthegatevoltagebecomesmorenegativeinann-channelJFET,thechannelbetweenthedepletionlayers a. Shrinks b. Expand

c. Conduct d. Stopconducting

179.Acascodeamplifierhastheadvantageof a. Largevoltagegain b. Lowinputcapacitance

c. Lowinputimpedance d. Highergm

180.TheinputsignalusedwithaJFETanalogswitchshouldbe a. Small b. Large 181.Thegate-sourcediodeofaJFETshouldbe a. Forward-biased b. Reverse-biased

c. Asquarewave d. Chopped c. Eitherforward-orreverse-biased d. Noneoftheabove

182.Comparedtoabipolartransistor,theJFEThasamuchhigher a. Voltagegain b. Inputresistance

c. Supplyvoltage d. Current

183.Thepinchoffvoltagehasthesamemagnitudeasthe a. Gatevoltage b. Drain-sourcevoltage

c. Gate-sourcevoltage d. Gate-sourcecutoffvoltage

184.WhenthedrainsaturationcurrentislessthanIDSS,aJFETactslikea a. Bipolartransistor b. Currentsource

c. Resistor d. Battery

185.RDSequalspinchoffvoltagedividedbythe a. Draincurrent b. Gatecurrent

c. Idealdraincurrent d. Draincurrentforzerogatevoltage

186.Thetransconductancecurveis a. Linear b. Similartothe ra hofaresistor

c. Nonlinear d. Likeasin ledraincurve

187.Thetransconductanceincreaseswhenthedraincurrentapproaches a. 0 b. ID(sat)

c. IDSS d. IS

188.TheinputimpedanceofaJFET a. Approacheszero b. Approachesone

c.  Approachesinfinity d. Isimpossibletopredict

a. Isavoltage-controlleddevice b. Isacurrent-controlleddevice

c. Hasalowinputresistance d. Hasaverylargevoltagegain

189.AJFET

190.Theacemitterresistanceofanemitterfollower a. Equalsthedcemitterresistance b. Islargerthantheloadresistance

c. HasnoeffectonMPP d. Isusuallylessthantheloadresistance

191.ForaclassBpush-pullemitterfollowertoworkproperly,theemitterdiodesmust a. Beabletocontrolthequiescentcurrent b. Haveapowerratinggreaterthanthe outputpower

c. HaveavoltagegainofI d. Matchthecompensatingdiodes

192.AsmallquiescentcurrentisnecessarywithaclassBpush-pullamplifiertoavoid a. b. c. d.

Thermalrunaway Destroyingthecompensatingdiodes Crossoverdistortion Excessivecurrentdrain

193.Thezenercurrentinazenerfolloweris a. Equaltotheoutputcurrent b. Smallerthantheoutputcurrent

c. Largerthantheoutputcurrent d. Pronetothermalrunaway

194.ThetransistorsofaclassBpush-pullemitterfollowerarebiasedatornear a. b.

Cutoff Thecenterofthedcloadline

c. Saturation d. Thecenteroftheacloadline

195.Thermalrunawayis a. Goodfortransistors b. Alwaysdesirable

c. Usefulattimes d. Usuallydestructive

196.Usually,thedistortioninanemitterfolloweris a. Verylow b. Veryhigh

c. Large d. Notacceptable

197.Asquarewaveoutofanemitterfollowerimplies a. Noclipping b. Clippingatsaturation

c. Clippingatcutoff d. Clippingonbothpeaks

198.Iftheloadresistanceofanemitterfollowerisverylarge,theexternalacemitterresistanceequals a. Generatorresistance b. Impedanceofthebase

c. DCemitterresistance d. DCcollectorresistance

199.Thecurrentdrainofanamplifieristhe a. Totalaccurrentfromthegenerator b. Totaldccurrentfromthesupply

c. Currentgainfrombasetocollector d. Currentgainfromcollectortobase

200.Theinstantaneousoperatingpointswings-alongthe a.  ACloadline b. DCloadline

c. Bothloadlines d. Neitherloadline

201.Comparedtotheacresistanceoftheemitterdiode,thefeedbackresistanceofaswampedamplifiershouldbe a. Small b. Equal

c. Large d. Zero

202.Theemitterisatacgroundina a. CBstage b. CCstage

c. CEstage d. Noneofthese

203.Theaccollectorcurrentisapproximatelyequaltothe a. ACbasecurrent b.  ACemittercurrent

c. ACsourcecurrent d. ACbypasscurrent

204.Thecapacitorthatproducesanacgroundiscalleda a. Bypasscapacitor b. Couplingcapacitor

c. Dcopen d. Acopen

205.Thecurrentinacouplingcircuitforhighfrequenciesis a. Zero b. Maximum

c. Minimum d. Average

206.Acouplingcapacitoris a. Adcshort b. Anacopen

c.  Adcopenandanacshort d. Adcshortandanacopen

207.Fordc,thecurrentinacouplingcircuitis a.  Zero b. Maximum

c. Minimum d. Average

208.Thecurrentsofapnptransistorare a. Usuallysmallerthannpncurrents b. Oppositenpncurrents

c. Usuallylargerthannpncurrents d. Negative

209.Themajoritycarriersintheemitterofapnptransistorare a. Holes b. Freeelectrons

c. Trivalentatoms d. Pentavalentatoms

210.Whichisthelargestcurrentinapnptransistor? a. Basecurrent b. Emittercurrent

c. Collectorcurrent d. Noneofthese

211.TheeasiestwaytobiasaJFETintheohmicregioniswith a. Voltage-dividerbias b. Self-bias

c. Gatebias d. Sourcebias

212.AnEnglishmathematicianwhoinventedthesliderulein1622. A. Blaise Pascal

C. Charles Babage

B. Clifford Berry

D.WilliamOughtred

213.Builtacomputerin1946attheInstituteofAdvanceStudy(IAS),Princeton,USA,thatusesbinarynumbersand storesinformation. A. Vannever Bush

C. John Atannasoff

B.JohnVanNeumann

D. Clifford Berry

214.Anelectronicdevicedesigntoacceptdataperformsprescribecomputationalandlogicaloperationsathighspeed andoutputtheresultsofthisoperation. A. Compiler

C.Computer 

B. Simulator

D. Digital Machine

215.Thecode1011inBCDis A. 24

C. 11

B. letter A

D.invalid

216.Firstcommercialcomputerintroducedin1953thatusesvalves. A. IBM-1400

C. IBM-701

B.UNIVAC 

D. ENIAC

217.Thefirstelectroniccomputerandwascompletedin1946.  A.ENIAC 

C. EDVAC

B. UNIVAC

D. Whirlwind I

218.ENIACwasdevelopedat  A.UniversityofPennsylvania

C. Cambridge University

B. Massachusetts Institute of Technology

D. Bell Laboratories

219.ENIACconsistofhowmanyvacuumtubes? A. 1,500 tubes 

C. 13,575 tubes

B. 3,575 tubes

D.18,000tubes

220.Referstotheincreaseduseofdataconversioncircuitsasaresultofincreasedapplication. A. Op Amps

C.Computers

B. Linear Circuit

D. Digital Equipment

221.WhichoneofthefollowingstatementisFALSE? a.Theresistanceofintrinsicsemiconductordecreaseswithincreaseoftemperature b.PureSidopedwithtrivalentimpuritiesgivesap-typesemiconductor c.Majoritycarriersinan-typesemiconductorareholes d.Minoritycarriesinap-typesemiconductorareelectrons 222.Whatisagroupofcircuitsthatprovidestimingandsignalstoalloperationinthecomputer? A. Output unit

C.Controlunit

B. Memory unit

D. Input unit

223.WhatdoesALUwhichcarriesarithmeticandlogicoperationsprocess? A. Binary Coded Decimal

C. Octal numbers

B. Hexadecimal numbers

D.Binarynumbers

224.Whatisthesmallestpartofacomputerlanguage? A. binary

C.bit

B. byte

D. word

225.Adigitalwordconsistingofonlyfourbitsiscalleda A. dibit

C. pixel

B. quad

D.nibble

226.Howmanysymbolsdoeshexadecimaldigitalnumbersystemused?  A.16

C. 8

B. 4

D. 32

227.Howmanysymbolsareusedoctaldigitalnumbersystem? A. 16

C.8 

B. 4

D. 2

228.Whatistherelationshipbetweencurrent(I)andvoltage(E)inacircuitconsistingofacapacitorinserieswitha resistor? a.IandEareinphaseacrossthecapacitor.

c.EleadsIacrossthecapacitor.

b. I leads E across the resistor.

d.IandEareinphaseacrosstheresistor

229.Whichofthefollowingisnotusedinhexadecimaldigitalsymbols? A. A

C.H

B. C

D. F

230.Mathematicsusedinexpressing,analyzing,anddesigningofdigitalelectroniccircuits.  A.Booleanalgebra

C. statistical approach

B. numerical methods

D. logical mathematics

231.Whatlevelisusedtorepresentlogic1inanegativelogiccircuit? A. negative transition level

C. positive transition level

B.lowlevel 

D. high level

232.Whatlevelisusedtorepresentlogic0inanegativelogiccircuit? a.highlevel 

c. negative transition level

b. low level

D. Positive transition level

233.Whyisitimportanttomaintainanimpedancematchfromthesourcetotheloadwhensendingsignals? a. to reduce external noise

c.toreducereflectedenergy

b. to keep the line balanced

d. to reduce attenuation

234.Becausesolidstatediodeshavenofilament,they a. don't work.

c.requirelessoperatingpower.

b. are less efficient than tubes.

d. require more operating power.

235.Holdingresistanceconstant,howdoesincreasingcurrentinacircuitaffectvoltage? a. current increases

c.voltageincreases

b. current decreases

d. voltage decreases

236.Asolidstatdevicewhichonlygivesa“1”outputifallinputsarealso“1”iscalled a.anANDgate

c. a NOR gate

b. a NAND gate

d. an OR gate

237.Inaclosedelectricalcircuit, a.oneterminalisalwayspositive, andoneterminalisalwaysnegative. b. bothterminals can be positive.

c. both terminals can be negative. d.terminalsare neitherpositive nor negative.

238._______referstotheclassoflogiccircuitcontainingflip-flops. A. Combinational

C. Linear

B.Sequential

D. Feedback

239.ToconvertDCtoAC,whichdeviceisused? a.converter  b. transformer

c. diode d. regulator

240.________iscalledthetimesharingofonelinewithmultiplexsignals. A. Simultaneous transmission

C. Relay

B. Bi-directional

D.Multiplexing

241.Dataselectorisalsocalled A. encoder

C.multiplexer 

B. decoder

D. demultiplexer

242.Ahightrafficconnectivityportionofanycommunicationsnetwork.Inpacket-switchednetworks,aprimaryforward directionpathtracedsequentiallythroughtwoormoremajorrelayorswitchingstations.Inpacket-switchednetworks,a backboneconsistsprimarilyofswitchesandinter-switchtrunks. a.backone

b. background noise

c.back resistance

d.back shell.

243.Thetotalsystemnoiseintheabsenceofasignal[informationtransmission]. a. backone

c. back shell

b. back resistance

d.backgroundnoise

244.Therearportionofaconnector. a .backone

b.backshell 

c. back resistance

d. background noise

245.Thelargerresistancevalueobservedwhenyouarecheckingtheresistanceofasemiconductor. a. backone

b. back shell

c.backresistance

d. background noise

246.APush-PullAmplifier. a. balanced code

c. balanced bridge

b.balancedamplifier 

d. balanced line

247.Abridgecircuitadjustedtoproduceazerooutput. a. balanced code

c.balancedbridge

b. balanced amplifier

d. balanced line

248.Acableorcircuithavingtwoidenticalconductorswiththesameelectromagneticcharacteristicsinrelationtoother conductorsandtoground,asinapairofconductors.Atwistedpairline a. balanced code

c. balanced bridge

b. balanced amplifier

d.balancedline

249.InPCMsystems,acodeconstructedsothatthefrequencyspectrumresultingfromthetransmissionofanycode wordhasnoDCcomponent.Acodethathasafinitedigitalsumvariation[PCM].Anumberofadditionaltermsare related,usethesearchbar,belowright,tofindthecorrectdefinition. a.balancedcode

c. balanced bridge

b. balanced amplifier

d. balanced line

250.Atestusedtosubjectacomponent,deviceorsystemtoextremeconditionstodeterminetheusefullifeofthe deviceundertest. a.acceleratedlifetesting

c. accelerometer

b. accelerating anode

d. acceleration servo system

251.Anelectrodechargedseveralthousandvoltspositiveandusedtoaccelerateelectronstowardthefrontofa Cathode-RayTube. a . accelerated life testing

c. accelerometer

b.acceleratinganode

d. acceleration servo system

252.Aservo-systemthatcontrolstheacceleration(rateofchangeinvelocity)ofaload. a. accelerated life testing

c. accelerometer

b. accelerating anode

d.accelerationservosystem

253.Adevicethatmeasurestheaccelerationtowhichitissubjectedanddevelopsasignalproportionaltoit. a. accelerated life testing

c.accelerometer 

b. accelerating anode

d. acceleration servo system

254.Animpuritywhich,whenaddedtoasemiconductor,acceptsoneelectronfromaneighboringatomandcreatesa holeinthelatticestructureofthecrystal.AlsocalledTrivalentImpurity. a. accelerated life testing

c.acceptorimpurity 

b. acces time

d. acceleration servo system

255.Thedifferenceintimebetweenwhendataisrequestedandwhendataisdelivered.Thetimelapsedbetweena givencommandandwhenthefunctionisperformed. a. accelerated life testing

c. acceptor impurity

b.accestime

d. acceleration servo system

256.Aregisterthatbothstoresanumberandaddstoothernumbersloadedintotheregister. a. ac generator

c. acorn tube

b.accumulator 

d. acoustics

257.Averysmalltubewithcloselyspacedelectrodesandnobase.Thetubeisconnectedtoitscircuitsbyshortwire pinsthataresealedinaglassorceramicenvelope.Theacorntubeisusedinlowpoweruhfcircuits. a. ac generator 

c.acorntube

b.accumulator

d. acoustics

258.Thescienceofsound. a. ac generator

c. acorn tube

b.accumulator

d.acoustics

259.Arotatingmachinethatconvertsmechanicalenergyintoalternatingcurrent. a.acgenerator 

c. acorn tube

b.accumulator

d. acoustics

260.Theunintendedsoundacomponentproduceswhileoperating.Somefieldsapplythistomeananaudiblesound, whileotherfieldstakeittomeananysound. a.acousticnoise

c. acorn tube

b.accumulator

d. acoustics

261.Acomponentthatdrawscurrentorsometypeofgain. a.activecomponent 

c. active low

b.activefilter

d. active pullup

262.Referstoaninvertedoutput,theoutputistruewhenlowandfalsewhenhigh.WhentheSum-of-Products expressionistruetheoutputislow. a. active component

c.activelow 

b.activefilter

d. active pullup

263.AtransistororFETusedtopullalinehighinsteadofaresistor.ActivePullupsarecommonwithinICs,buttheyare notdesignedtosinkmuchcurrent[weakpull-up]. a. active component

c. active low

b.activefilter

d.activepullup

264.Afilterthatusesanamplifierinadditiontopassivecomponents. a . active component

c. active low

b.activefilter 

d. active pullup

265.Referstoanon-invertedoutput,theoutputistruewhenhighandfalsewhenlow.WhentheSum-of-Products expressionistruetheoutputishigh. a. active component

b. active low

b.activehigh

d. active pullup

266.Acablethatisreadyforinstallationinspecificapplicationsandusuallyterminatedwithconnectors. a.cableassembly 

c. cable clamp

b.cablecarrier

d. cable, coaxial

267.Amechanicalclampattachedtothewireentranceofaconnectortosupportthecableorwirebundle,provide stressrelief,andabsorbvibrationandshock. a.cableassembly

c.cableclamp

b.cablecarrier

d. cable, coaxial

268.Acableinwhichaninsulatedconductoriscenteredinsideanother.Theouterconductorisusuallyametalbraidor metalsheath.Braidedcablesusuallyhaveanouterinsulatingjacketoverthebraid.Coaxialcablesareusedprimarilyfor transmissionofRFsignals. a.cableassembly

c. cable clamp

b.cablecarrier

d.cable,coaxial

269.Adevicethatholdsacable.AlsorefertoadetaileddefinitionofCableCarrier.Insomecaseitmaybecalledacable retracter. a.cableassembly

c. cable clamp

b.cablecarrier

d. cable, coaxial

270.Agroupofwiresorribbonsofwiringusedtointerconnectelectronicsystemsandsubsystems. a.cablejacket

c. cable clamp

b.cableharness

d. cable sheat

271.Aconductiveprotectivecoveringappliedtocables.SeethediagramforaCoaxCablewitharmorabove. a.cablejacket

c. cable clamp

b.cableharness

d.cablesheat

272.Thepropertyofanelectricalcircuitthatopposeschangesinvoltage. a.capacitance

c. capacitor

b.capacitivecoupling

d. capacitive reactance

273.Thetransferofenergyfromonecircuittoanotherbymeansofthemutualcapacitancebetweenthecircuits. a. capacitance

c. capacitor

b.capacitivecoupling

d. capacitive reactance

274.Theopposition,expressedinohms,offeredtotheflowofanalternatingcurrentbycapacitance. a.capacitance

c. capacitor

b.capacitivecoupling

d.capacitivereactance

275.Anelectricaldevicecapableofstoringelectricalenergyinanelectrostaticfield. a. capacitance

c.capacitor

b.capacitivecoupling

d. capacitive reactance

276.Asinusoidalwaveinwhichtheamplitudesteadilydecreaseswithtime.Oftenassociatedwithenergyloss. a. capacitance

c.dampedwave

b.damping

d. capacitive reactance

277.Theprocessofsmoothingoutoscillations.Theprogressivedecaywithtimeintheamplitudeofthefreeoscillations inacircuit. a.capacitance

c. damped wave

b.damping

d. capacitive reactance

278.Theextenttowhichafunctionalunitfocusedatinfinity,thefar-fieldregionissometimeswillcontinuetooperate atadefinedperformanceleveleventhoughoneormoreofitscomponentsaremalfunctioning. a.FEP

c. FDDI

b.faulttolerance

d. feedback

279.FiberDistributedDataInterfaceisaLocalAreaNetwork[LAN]usingFiber-OpticcableinaDualTokenRingtopology. a.FEP







b.faulttolerance



c.FDDI d. feedback

280.Thereturnofaportionoftheoutput,orprocessedportionoftheoutput,ofa(usuallyactive)devicetotheinput. a.FEP

c. FDDI

b.faulttolerance

d.feedback

281.FluorinatedEthylenePropylene,Asynthetictypeofinsulation. a.FEP 

b. FDDI

b.faulttolerance

d. feedback

282.Afiberopticcomponentnormallyassembledontoacableandattachedtoapieceofapparatusforthepurposeof providinginterconnecting/disconnectingoffiberopticcables. a.Fiberopticconnector

c. fiber optic link

b.fidelity

d. fibrous braid

283.Acommunicationslinkthattransmitssignalsbymeansofmodulatedlightpropagatedinanopticalfiber. a.Fiberopticconnector

c.fiberopticlink

b.fidelity

d. fibrous braid

284.Anoutercoveringusedtoprotectaconductor’sinsulatingmaterial.Commonlymadefromcotton,linen,silk,rayon, orfiberglass. a.Fiberopticconnector

c. fiber optic link

b.fidelity

d.fibrousbraid

285.Thefaithfulreproductionofasignal.Theaccuracywithwhichasystemreproducesasignalatitsoutputthat faithfullymaintainstheessentialcharacteristicsoftheinputsignal. a.Fiberopticconnector

c. fiber optic link

b.fidelity 

d.fibrousbraid

286.Dataflowineitherdirection,butnotinbothdirectionsatthesametime.Thereareanumberofinterfacebuses thatonlyallowHalf-Duplexoperation,whilesomebusnetworksjustaddaredundantpathintheoppositedirectionto allowcommunicationineitherdirectionatthesametime. a.half-waverectifier

c. half-wave voltage boubler

b.half-duplex 

d.NOTA

289.Arectifierusingonlyone-halfofeachcycletochangeactopulsatingdc. a.half-waverectifier 

c. half-wave voltage boubler

b.half-duplex

d.NOTA

290.Twohalf-wavevoltagerectifiersconnectedtodoubletheinputvoltage. a.half-waverectifier

c.half-wavevoltageboubler

b.half-duplex

d.NOTA

291.Apointonawaveformorradarbeamthatcorrespondstohalfthepowerofthemaximumpowerpoint. a.half-waverectifier

c. half-wave voltage boubler

b.half-duplex

d.NOTA

292.Afrequencythatisawhole-numbermultipleofasmallerbasefrequency.Ofasinusoidalwave,anintegralmultiple ofthefrequencyofthewave.Harmonicpercentagesofahalfsinewave;2nd,21.2%,3rd,0%,4th4.2%,5th,0%and6th harmonicis1.8%. a.harmonic  b.acoustic

c. harmonic distortion 

d.NOTA

293.Aratioof100timesthesumofalltheharmonicstothefundamental.Intheoutputsignalofadevice,distortion causedbythepresenceoffrequenciesthatarenotpresentintheinputsignal,causedbynonlinearitieswithinthedevice. c.harmonicdistortion

a. harmonic b.acoustic



d.NOTA

294.Theworkdonebyaforceofonenewtonactingthroughadistanceofonemeter. a. JTAG

c.joule

b.jitter

d.NOTA

295.A“U”shapedoppositepolaritymaterialbuiltanearJFET-channelcenteriscalled a.Gate

c. Block

b. Drain

d. Heat Sink

296.D-MOSFETsaresometimesusedinseriestoconstructacascodehigh-frequencyamplifiertoovercomethelossof  ______________. a. Low output impedance c. Capacitive reactance b.Highinputimpedance d. Inductive reactance

297.AMOSFEThashowmanyterminals? a. 2 or 3 b. 3 

c. 4 d.3or4

298.WhencheckingagoodSCRorTRIACwithanohmmeteritwill: a.Showhighresistanceinbothdirection c.Showhighresistancewithpositive on anode and negative on cathode b.Showlowresistancewithpositive d.Showlowresistanceinbothdirection on anode and negative on cathode 299.Whatdoesahalleffectsensorsense? a. Temperature b. Moisture

c.Magneticfields d. Pressure

300.Whattypeofapplicationwoulduseaphotovoltaiccell? a. An automobile horn c. A magnetic field detector d.Aremotepowersource b. A T1-92 calculator