Test Bank for Principles of Physics Extended, International Adaptation, 12th Edition by Halliday.pdf

TestBankfor PhysicsPrinciples wit
j j j j j




h Applications ((10))
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Physics:j Principlesj withj Applications, j Sixthj Edition



25) Ifjthejcurrentjflowingjthroughj ajcircuitjofjconstantjresistancejis jdoubled, jthejpowerjdissipatedjby jt
hatjcircuitjwill
A) quadruple.
B) double.
C) decreasejtojonejhalf.
D) decreasejtojonejfourth.
Answer:j A
Diff:j 1 Page jRef:jSec.j18.5-18.6


26) Duringjajpowerjdemand, j thejvoltagejoutputjis jreducedjby j5. 0%. j By jwhatjpercentagejis jthejpow
erjonjajresistorjaffected?
A) 2.5% jless
B) 5.0% jless
C) 10% jless
D) 90% jless
Answer:j C
Diff:j 2 Page jRef:jSec.j18.5-18.6


27) Ajcurrentjthatjis jsinusoidal jwithj res pectj toj timejis jreferredjtoj as
A) ajdirectjcurrent.
B) anjalternatingjcurrent.
Answer:j B
Diff:j 1 Page jRef:jSec.j18.7


28) Considerjtwojcopperjwires jeachjcarryingj ajcurrentjofj3.0j A.j Onejwirej has jtwicejthejdiameterjofj th
ejother. j Thejratiojofjthejdriftjv elocity jinjthejsmallerjdiameterjwirejtoj thatjinjthejlargerj diameterjw
irejis
A) 4:1.
B) 2:1.
C) 1:2.
D) 1:4.
Answer:j A
Diff:j 2 Page jRef:jSec.j18.8


29) Materials jinjwhichjthejresistivity jbecomes jessentially jzerojatjvery jlowjtemperatures jarejre
ferredjtojas
A) conductors.
B) insulators.
C) semiconductors.
D) superconductors.
Answer:j D
Diff:j 1 Page jRef:jSec.j18.9



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Chapterj18:j Electric jCurrents



Quantitativej Problems

1) Whatj currentj is j flowingj ifj 0.67j Cj ofj chargej pass j aj pointj inj 0.30j s?
A) 2.2jA
B) 0.67jA
C) 0.30jA
D) 0.20jA
Answer:j A
Diff:j 1 Page jRef:jSec.j18.1


2) Ajchargejofj12jCjpasses jthroughj anjel ectroplati ngj apparatus jinj2.0jmin. j Whatjis jthejav eragejcurr
ent?
A) 0.10jA
B) 0.60jA
C) 1.0jA
D) 6.0jA
Answer:j A
Diff:j 1 Page jRef:jSec.j18.2


3) Howjmuchjchargejmustjpass jby jaj pointjinj 10js jforj the jcurrentj tojbej0.50jA?
A) 20jC
B) 2.0jC
C) 5.0jC
D) 0.050jC
Answer:j C
Diff:j 1 Page jRef:jSec.j18.2


4) Ajtotal jofj2.0j˛j1013jprotons jpass jaj givenjpointjinj15js.j Whatjis jthejcurrent?
A) 1.3jmA
B) 1.3jA
C) 0.21jmA
D) 3.2jmA
Answer:j C
Diff:j 2 Page jRef:jSec.j18.2


5) Whatj currentj is j flowingj ifj 4.0j ˛j 1016j electrons j pass j aj pointj inj 0.50j s?
A) 0.013jA
B) 0.31jA
C) 6.3jA
D) 78jA
Answer:j A
Diff:j 2 Page jRef:jSec.j18.2


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Physics:j Principlesj withj Applications, j Sixthj Edition



6) Ifj3.0j˛j1015jelectrons jflowjthroughj ajsectionjofj ajwirejofj diameterj2.0jmmjinj4.0js,jwhatjis jthejcurr
entjinjthejwire?
A) 0.12jmA
B) 0.24jmA
C) 7.5j˛j107jA
D) 7.5j˛j1014jA
Answer:j A
Diff:j 2 Page jRef:jSec.j18.2


7) Ajcoffeejmaker, jwhichjdraws j13.5jAjofjcurrent, jhas jbeenjleftjonjforj10jmin. j Whatjis jthej netjnum
berjofjelectrons jthatjhavej passedj throughjthejcoffeejmaker?
A) 1.5j ˛j1022
B) 5.1j ˛j1022
C) 1.8j ˛j103
D) 8.1j ˛j103
Answer:j B
Diff:j 2 Page jRef:jSec.j18.2


8) Injanjelectroplatingjprocess, jitjis jdesiredjtoj depositj 40jmgjofjsilverjonj ajmetal jpartjby jusingjajcurr
entjofj2.0jA.j Howjlongjmustjthejcurrentj bejallowedjtoj runj tojdepositjthis jmuchjsilver? j(Thejsilverj
ions jarejsingly jcharged,jandjthej atomicjweightjofjsilverjis j108.)
A) 16js
B) 18js
C) 20js
D) 22js
Answer:j B
Diff:j 2 Page jRef:jSec.j18.2


9) Whatjpotential jdifferencejis jrequiredj tojcausej 4.00j Ajtojflowj throughjaj resistancejofj 330 jW?
A) 12.1jV
B) 82.5jV
C) 334jV
D) 1320jV
Answer:j D
Diff:j 1 Page jRef:jSec.j18.3




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