AC THEORY FINAL QUESTIONS WITH
CORRECT ANSWERS
100 zzVrms zz= zz_______________ zzVolts zzpeak.
1. zz100
zz2. zz141.4
3. zz70.7
zz4. zz0 zz- zzAnswer zz141.4
Apparent zzpower zzis:
1. zzthe zzquantity zzat zzits zzmaximum zzpositive zzor zznegative zzpoint zzin zzrelation zzto
zzzero
zz2. zzthe zzvalue zzof zza zzquantity zzat zza zzgiven zzmoment zzin zztime
3. zzthe zzuseful zzpower zzof zzan zzalternating zzcurrent zzcircuit
4. zzthe zzproduct zzof zzthe zztotal zzvoltage zztimes zzthe zztotal zzcurrent zz- zzAnswer zzthe
zzproduct zzof zzthe zztotal zzvoltage zztimes zzthe zztotal zzcurrent
277 zzV zzpeak zz= zz_______________ zzVrms.
1. zz277
zz2. zz195.839
zz3. zz391.678
zz4. zz480 zz- zzAnswer zz195.839
At zz60 zzHz, zzthe zzcapacitive zzreactance zzof zza zz45 zzmicrofarad zzcapacitor zzis
zz__________ zzohms.
5.8946
58.946
589.46
.58946 zz- zzAnswer zz58.946
An zzinductor zzis
the zztotal zzopposition zzto zzcurrent zzflow zzin zzan zzalternating zzcurrent zzcircuit
zzthe zzopposition zzto zzcurrent zzflow zzin zzan zzalternating zzcurrent zzcircuit zzdue zzto
zzinductance
, zzan zzelectrical zzdevice zzthat zzstores zzenergy zzin zzelectro-static
zzan zzelectrical zzdevice zzthat zzstores zzenergy zzin zzelectro-magnetic zzform zz- zzAnswer
zzan zzelectrical zzdevice zzthat zzstores zzenergy zzin zzelectro-magnetic zzform
At zz60 zzHz, zzthe zzinductive zzreactance zzof zza zz156.359 zzmillihenry zzinductor zzis
zz____________ zzohms.
5.8946
zz58.946
zz589.46
zz.58946 zz- zzAnswer zz58.946
An zzA/C zzcircuit zzhas zza zz37 zzohm zzresistor zzin zzit. zzThe zzsource zzis zz347 zzvolts.
zzWhat zzis zzthe zzinstantaneous zzpower zzacross zzthe zzresistor zzwhen zzvoltage zzis zzat
zz347 zzdegrees?
3254 zzwatts
zz732.028 zzwatts
zz490.658 zzwatts
zz329.246 zzwatts zz- zzAnswer zz
One zzcomplete zzwaveform zzis
the zzunit zzof zzmeasure zzof zzfrequency
zzone zzhalf zzof zzone zzcycle
zzthe zzpattern zzof zzvariations zzshowing zzhow zzthe zzquantity zzchanges zzover zztime
zzone zzcycle zz- zzAnswer zzone zzcycle
True zzpower zzis
the zzquantity zzat zzits zzmaximum zzpositive zzor zznegative zzpoint zzin zzrelation zzto zzzero
zzthe zzvalue zzof zza zzquantity zzat zza zzgiven zzmoment zzin zztime
zzthe zzuseful zzpower zzof zzan zzalternating zzcurrent zzcircuit
zzthe zzproduct zzof zzthe zztotal zzvoltage zztimes zzthe zztotal zzcurrent zz- zzAnswer zzthe
zzuseful zzpower zzof zzan zzalternating zzcurrent zzcircuit
A zz75 zzmillihenry zzinductor zzis zzin zza zz100 zzHz zzA/C zzcircuit. zzWhat zzis zzthe zzcurrent
zzflow zzthrough zzthis zzcircuit zzwhen zzthe zzsource zzis zz50 zzvolts?
CORRECT ANSWERS
100 zzVrms zz= zz_______________ zzVolts zzpeak.
1. zz100
zz2. zz141.4
3. zz70.7
zz4. zz0 zz- zzAnswer zz141.4
Apparent zzpower zzis:
1. zzthe zzquantity zzat zzits zzmaximum zzpositive zzor zznegative zzpoint zzin zzrelation zzto
zzzero
zz2. zzthe zzvalue zzof zza zzquantity zzat zza zzgiven zzmoment zzin zztime
3. zzthe zzuseful zzpower zzof zzan zzalternating zzcurrent zzcircuit
4. zzthe zzproduct zzof zzthe zztotal zzvoltage zztimes zzthe zztotal zzcurrent zz- zzAnswer zzthe
zzproduct zzof zzthe zztotal zzvoltage zztimes zzthe zztotal zzcurrent
277 zzV zzpeak zz= zz_______________ zzVrms.
1. zz277
zz2. zz195.839
zz3. zz391.678
zz4. zz480 zz- zzAnswer zz195.839
At zz60 zzHz, zzthe zzcapacitive zzreactance zzof zza zz45 zzmicrofarad zzcapacitor zzis
zz__________ zzohms.
5.8946
58.946
589.46
.58946 zz- zzAnswer zz58.946
An zzinductor zzis
the zztotal zzopposition zzto zzcurrent zzflow zzin zzan zzalternating zzcurrent zzcircuit
zzthe zzopposition zzto zzcurrent zzflow zzin zzan zzalternating zzcurrent zzcircuit zzdue zzto
zzinductance
, zzan zzelectrical zzdevice zzthat zzstores zzenergy zzin zzelectro-static
zzan zzelectrical zzdevice zzthat zzstores zzenergy zzin zzelectro-magnetic zzform zz- zzAnswer
zzan zzelectrical zzdevice zzthat zzstores zzenergy zzin zzelectro-magnetic zzform
At zz60 zzHz, zzthe zzinductive zzreactance zzof zza zz156.359 zzmillihenry zzinductor zzis
zz____________ zzohms.
5.8946
zz58.946
zz589.46
zz.58946 zz- zzAnswer zz58.946
An zzA/C zzcircuit zzhas zza zz37 zzohm zzresistor zzin zzit. zzThe zzsource zzis zz347 zzvolts.
zzWhat zzis zzthe zzinstantaneous zzpower zzacross zzthe zzresistor zzwhen zzvoltage zzis zzat
zz347 zzdegrees?
3254 zzwatts
zz732.028 zzwatts
zz490.658 zzwatts
zz329.246 zzwatts zz- zzAnswer zz
One zzcomplete zzwaveform zzis
the zzunit zzof zzmeasure zzof zzfrequency
zzone zzhalf zzof zzone zzcycle
zzthe zzpattern zzof zzvariations zzshowing zzhow zzthe zzquantity zzchanges zzover zztime
zzone zzcycle zz- zzAnswer zzone zzcycle
True zzpower zzis
the zzquantity zzat zzits zzmaximum zzpositive zzor zznegative zzpoint zzin zzrelation zzto zzzero
zzthe zzvalue zzof zza zzquantity zzat zza zzgiven zzmoment zzin zztime
zzthe zzuseful zzpower zzof zzan zzalternating zzcurrent zzcircuit
zzthe zzproduct zzof zzthe zztotal zzvoltage zztimes zzthe zztotal zzcurrent zz- zzAnswer zzthe
zzuseful zzpower zzof zzan zzalternating zzcurrent zzcircuit
A zz75 zzmillihenry zzinductor zzis zzin zza zz100 zzHz zzA/C zzcircuit. zzWhat zzis zzthe zzcurrent
zzflow zzthrough zzthis zzcircuit zzwhen zzthe zzsource zzis zz50 zzvolts?
