Guide Questions and Answers
Updated 2026
WhatAconstitutesAaAcapacitor?A-AAnswer✓ATwoAconductorsAseparatedAbyAanAinsulator.
WhatAisAtheApurposeAofAaAcapacitor?A-
AAnswer✓AItAstoresAelectricalAenergyAinAelectrostaticAfields.
DoesAaAcapacitorAinAanAACAcircuitAcauseAtheAcurrentAtoAleadAorAlagAtheAvoltage?A-
AAnswer✓AItAcausesAtheAcurrentAtoAleadAtheAvoltage.
WhatAisAtheAbasicAunitAofAcapacitance?A-AAnswer✓ATheAferad.
WhyAshouldAelectrolyticAcapacitorsAnotAbeAusedAinAanAACAcircuit?A-
AAnswer✓ATheyAareApolarized.AAnAelectrolyticAcapacitorAwillApassAcurrentAofAoneApolarity,
AbutAwillAblockAcurrentAofAtheAoppositeApolarity.
WhatAisAmeantAbyAinductance?A-
AAnswer✓ATheAabilityAtoAstoreAelectricalAenergyAinAelectromagneticAfields.
WhatAisAtheAbasicAunitAofAinductance?A-AAnswer✓ATheAhenry.
WhatAisAanAexampleAofAanAinductorAusedAinAaAmagneto?A-AAnswer✓ATheAcoil.
DoesAanAinductorAinAanAACAcircuitAcauseAtheAcurrentAtoAleadAorAlagAtheAvoltage?A-
AAnswer✓AItAcausesAtheAcurrentAtoAlagAbehindAtheAvoltage.
HowAcanAyouAfindAtheApolarityAofAanAelectromagnet?A-
AAnswer✓AHoldAtheAelectromagnetAinAyourAleftAhandAwithAyourAfingersAencirclingAtheAcoil
AinAtheAdirectionAelectronsAflowA(fromAnegativeAtoApositive).AYourAthumbAwillApointAtoAtheA
northApoleAofAtheAelectromagnet.
,WhatAisAmeantAbyAimpedance?A-
AAnswer✓ATheAtotalAoppositionAtoAtheAflowAofAalternatingAcurrent.AItAisAtheAvectorAsumAo
fAresistanceAcapacitiveAreactance,AandAinductiveAreactance.
InAwhatAunitsAisAimpedanceAmeasured?A-AAnswer✓AInAohms.
WhatAareAfiveAsourcesAofAelectricalAenergy?A-
AAnswer✓AMagnetism,AchemicalAenergy,Alight,Aheat,AandApressure.
WhatAisAtheAbasicAunitAofApowerAinAaADCAcircuit?A-AAnswer✓ATheAwatt.
WhatAisAmeantAbyAaAkilowatt?A-AAnswer✓A1,000Awatts.
WhatAisAmeantAbyAaAmegawatt?A-AAnswer✓A1,000,000Awatts.
WhatAisAtheAformulaAforApowerAinAaADCAcircuit?A-
AAnswer✓APowerA=AVoltageAtimesAcurrentA(PA=AEAxAI)
WhatAisAtheArelationshipAbetweenAmechanicalAandAelectricalApower?A-
AAnswer✓A1AhorsepowerA=A746Awatts
WhatAisAmeantAbyAtrueApowerAinAanAACAcircuit?A-
AAnswer✓ATheAproductAofAtheAcircuitAvoltageAandAtheAcurrentAthatAisAinAphaseAwithAthisA
voltage.
InAwhatAunitsAisAtrueApowerAexpressed?A-AAnswer✓AInAwatts.
WhatAisAmeantAbyAapparentApowerAinAanAACAcircuit?A-
AAnswer✓ATheAproductAofAtheAcircuitAvoltageAandAtheAcircuitAcurrent.
,InAwhatAunitsAisAapparentApowerAexpressed?A-AAnswer✓AInAvolt-amps.
WhatAisAmeantAbyAtheAreactiveApowerAinAanAACAcircuit?A-
AAnswer✓ATheApowerAconsumedAinAtheAinductiveAandAcapacitiveAreactancesAinAanAACAcircu
it.AReactiveApowerAisAalsoAcalledAwattlessApower.
InAwhatAunitsAisAreactiveApowerAexpressed?A-AAnswer✓AInAvolt-
ampsAreactiveA(VAR),AorAkilovolt-ampsAreactiveA(KVAR).
WhatAisAmeantAbyApowerAfactorAinAanAACAcircuit?A-
AAnswer✓ATheAratioAofAtrueApowerAtoAapparentApower.AItAisAalsoAtheAratioAofAcircuitAresi
stanceAtoAcircuitAimpedance.
WhichAlawAofAelectricityAisAtheAmostAimportantAforAanAaircraftAmechanicAtoAknow?A-
AAnswer✓AOhm'sAlaw.
WhatAareAtheAelementsAofAOhm'sAlaw?A-
AAnswer✓AVoltageAE,AcurrentAI,AandAresistanceARA(volts,Aamps,AandAohms).
WhatAisAvoltage?A-AAnswer✓AElectricalApressure.
WhatAisAtheAbasicAunitAofAvoltage?A-AAnswer✓ATheAvolt.
WhatAinstrumentAisAusedAtoAmeasureAvoltage?A-AAnswer✓AAAvoltmeter.
ToAmeasureAvoltage,AisAaAvoltmeterAplacedAinAseriesAorAinAparallelAwithAtheAsourceAofAvolt
age?A-AAnswer✓AInAparallel.
WhatAisAelectricalAcurrent?A-AAnswer✓ATheAflowAofAelectronsAinAaAcircuit.
, WhatAisAtheAbasicAunitAofAcurrentAflow?A-AAnswer✓ATheAampereA(amp).
WhatApartAofAanAampAisAaAmilliamp?A-AAnswer✓AOneAthousandthA(0.001)AofAanAamp.
WhatAinstrumentAisAusedAtoAmeasureAcurrentAflow?A-AAnswer✓AAnAammeter.
WhatAtwoAthingsAhappenAwhenAcurrentAflowsAthroughAaAconductor?A-
AAnswer✓AHeadAisAgeneratedAandAaAmagneticAfieldAsurroundsAtheAconductor.
ToAmeasureAcurrentAthroughAaAcomponent,AisAanAammeterAplacedAinAparallelAorAinAseriesA
withAtheAcomponent?A-AAnswer✓AInAseries.
WhatAisAmeantAbyAresistanceAinAanAelectricalAcircuit?A-
AAnswer✓ATheAoppositionAtoAtheAflowAofAelectrons.
WhatAisAtheAbasicAunitAofAelectricalAresistance?A-AAnswer✓ATheAohm.
WhatAisAaAmegohm?A-AAnswer✓AOneAmillionA(1,000,000)Aohms.
WhatAfourAthingsAaffectAtheAresistanceAofAanAelectricalAconductor?A-
AAnswer✓ATheAmaterial,AtheAcross-sectionalAarea,AtheAlength,AandAtheAtemperature.
WhatAinstrumentAisAusedAtoAmeasureAelectricalAresistance?A-AAnswer✓AAnAohmmeter.
HowAcanAyouAtellAtheAresistanceAofAaAcompositionAresistor?A-
AAnswer✓AByAaAseriesAofAcoloredAbandsAaroundAoneAendAofAtheAresistor.
WhatAisAmeantAbyAcontinuityAinAanAelectricalAcircuit?A-
AAnswer✓ATheAcircuitAisAcontinuousA(orAcomplete)AwhenAelectronsAcanAflowAfromAoneAtermi
nalAofAtheApowerAsourceAtoAtheAother.