Test Bank For Principles & Practice of Physics 21st Edition All Chapters - 9780321961235.pdf

Test Bank for Physics Principles w
g g g g g




ith Applications ((10))
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Physics:g Principlesg withg Applications,g Sixthg Edition



25) Ifgthegcurrentgflowinggthroughgagcircuitgofgconstantgresistancegisgdoubled,gthegpowergdissipa
tedgbygthatgcircuitgwill
A) quadruple.
B) double.
C) decreasegtogoneghalf.
D) decreasegtogonegfourth.
Answer:g A
Diff:g 1 PagegRef:gSec.g18.5-18.6


26) Duringgagpowergdemand,gthegvoltagegoutputgisgreducedgbyg5.0%.g Bygwhatgpercentagegisg
thegpowergongagresistorgaffected?
A) 2.5%gless
B) 5.0%gless
C) 10%gless
D) 90%gless
Answer:g C
Diff:g 2 PagegRef:gSec.g18.5-18.6


27) Agcurrentgthatgisgsinusoidalgwithgrespectgtogtimegisgreferredg tog as
A) agdirectgcurrent.
B) angalternatinggcurrent.
Answer:g B
Diff:g 1 PagegRef:gSec.g18.7


28) Considergtwogcoppergwiresgeachgcarryinggagcurrentgofg3.0gA.g Onegwireghasgtwicegthegdiam
etergofgthegother.g Thegratiogofgthegdriftgvelocitygingthegsmallergdiametergwiregtogthatgingth
eglargergdiametergwiregis
A) 4:1.
B) 2:1.
C) 1:2.
D) 1:4.
Answer:g A
Diff:g 2 PagegRef:gSec.g18.8


29) Materialsgingwhichgthegresistivitygbecomesgessentiallygzerogatgveryglowgtemperaturesg
aregreferredgtogas
A) conductors.
B) insulators.
C) semiconductors.
D) superconductors.
Answer:g D
Diff:g 1 PagegRef:gSec.g18.9



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Chapterg18:g ElectricgCurrents



QuantitativegProblems

1) Whatg currentg isg flowingg ifg 0.67g Cg ofg chargeg passg ag pointg ing 0.30g s?
A) 2.2gA
B) 0.67gA
C) 0.30gA
D) 0.20gA
Answer:g A
Diff:g 1 PagegRef:gSec.g18.1


2) Agchargegofg12gCgpassesgthroughgangelectroplatinggapparatusging2.0gmin.g Whatgisgthegaver
agegcurrent?
A) 0.10gA
B) 0.60gA
C) 1.0gA
D) 6.0gA
Answer:g A
Diff:g 1 PagegRef:gSec.g18.2


3) Howgmuchgchargeg mustgpassgbygagpointging 10gsg forgthegcurrentgtog beg 0.50g A?
A) 20gC
B) 2.0gC
C) 5.0gC
D) 0.050gC
Answer:g C
Diff:g 1 PagegRef:gSec.g18.2


4) Agtotalgofg2.0g ˛g1013gprotonsgpassgaggivengpointging15gs.g Whatgisgthegcurrent?
A) 1.3gmA
B) 1.3gA
C) 0.21gmA
D) 3.2g mA
Answer:g C
Diff:g 2 PagegRef:gSec.g18.2


5) Whatg currentg isg flowingg ifg 4.0g ˛g1016g electronsg passg ag pointg ing 0.50g s?
A) 0.013gA
B) 0.31gA
C) 6.3gA
D) 78gA
Answer:g A
Diff:g 2 PagegRef:gSec.g18.2


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Physics:g Principlesg withg Applications,g Sixthg Edition



6) Ifg3.0g˛g1015gelectronsgflowgthroughgagsectiongofgagwiregofgdiameterg2.0gmmging4.0gs,gwhat
gisgthegcurrentgingthegwire?

A) 0.12gmA
B) 0.24gmA
C) 7.5g˛g107gA
D) 7.5g˛g1014gA
Answer:g A
Diff:g 2 PagegRef:gSec.g18.2


7) Agcoffeegmaker,gwhichgdrawsg13.5gAgofgcurrent,ghasgbeengleftgongforg10gmin.g Whatgisgth
egnetgnumbergofgelectronsgthatghavegpassedgthroughgthegcoffeegmaker?
A) 1.5g ˛g1022
B) 5.1g ˛g1022
C) 1.8g ˛g103
D) 8.1g ˛g103
Answer:g B
Diff:g 2 PagegRef:gSec.g18.2


8) Ingangelectroplatinggprocess,gitgisgdesiredgtogdepositg40gmggofgsilvergongagmetalgpartgbygus
inggagcurrentgofg2.0gA.g Howglonggmustgthegcurrentgbegallowedgtogrungtogdepositgthisgmuc
hgsilver?g(Thegsilvergionsgaregsinglygcharged,gandgthegatomicgweightgofgsilvergisg108.)
A) 16gs
B) 18gs
C) 20gs
D) 22gs
Answer:g B
Diff:g 2 PagegRef:gSec.g18.2


9) Whatgpotentialgdifferencegisgrequiredgtogcauseg4.00g Agtogflowgthroughgagresistancegofg 330gW?
A) 12.1gV
B) 82.5gV
C) 334gV
D) 1320gV
Answer:g D
Diff:g 1 PagegRef:gSec.g18.3




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