CircuitsTest
a O
1 fo 3 - Chosefhe ferm thaf besf fifs what fhe questiondescribes
1)
2)
3)
4)
ohrnsof Resistonce
difference)
Voftoge (or potentiol
Wotts of Power
Amps of Current
D Whichterm best Describesthe movingelectronsthrougho circuit?
z)'
to f low
Whichterm best describeshowhqrdit is for the alactrons
througho circuit?
Whichterm best describesthe drivingene?gyprovidadby the moving
4 electrons
to movethroughthe circuitwith ?
(Ordrivingenergy
lostostheymove
through
thecircuit?)
,
of flowingelectrons
movethroughthe
fn the circuitshown.02coulombs
of currentflowsthrough
circuitin onminute(60sec.).HowmonyAmperes
the circuit ?
1)
2)
3)
4)
(RemenberI nilliAnp = lXl73Anps OR0.001Anps)
0 . 3 3m i l l i A m p s
0.00033milliAmps
1 2m i l l i A m p s
0.012milliAmps
E ) l
of the circuitwentup the
n 4,lf the temperoture
Referringto guestio
f lowingout of the bottary would
Amountoi coulombs/second
f) f,^.. e(|re
,
o , - - .t :t t- +
c .
I b lL
fi€nct
5.,^€
n De<"east
to a currentof
charges
elementary
Persec11!'lsequivalent
Chargeflowingat therateof 2.50x 1016
(3) 4'00x 1{ A
trl z.Sox 10rsA
A
(4)2'50
x 10.3
i;i e;.;;.io'e
Recoll1 elementorychargeis 1 electron
?)
The current aaveling from the cathode to tbe
scree! in a telefuion picture tube -is
5.0 x 10-5 anpere. Holv many electrpns stike
the screenin 5.b seconds?
(1) 3.1x IOs
(2) 6.3x 10rB
E)
(3) 1.6x 10rt
(4) 1.0x ld
minutes'
, A completecircuitis left on for senteral
become
to
wire
cEPPer
l;,,sio[ il; connecung
iff;:
il;;;;P;;d*
dftl" "'i" increases'
iU"'J".ttr"A te.isttnc" of tbe wire
r(1) dscreases
(2) increases.
(3) remainsthe ssme
1)
gold'andnichrome
ffi
Alumbum,ccryPer,
x 10-1meterandffi
i5
"""4 f""etbt'if
;f [:ll"**nry
ffiT
;"":E:"iEs
resistanccP
(1) alumiuum
(9) corpper
(s)so4
(4)
nichrome
,|")
yh"t T tire resistanceat 20oC of a l.E0-meterlong aluminum conductor that has " oorrsectionalareaof 1.lB x 1016uetet'?
(i) 1.87x 10.3Q
(3) e.Zax tO-l e
(2) 2.28x 10-ue
(4) r.SSx tose
ru)
'fhe table belou' lists various characteristicsof two metallic wires,
d and E.
CroesSecllonal
Area
(m1
Ifwte A hasresistance
R, thenwire B hasresistance
(3)
*
(4) 4n
tn
44 Wbich graph best representsthe relationship between resistanceand length of a copper wire of uniforcr
cross-sectiondareaat constant temperafure?
fi[ frLfrV
$$$L
Lan$h
(1)
Length.
(2)
Length
(s)
Length
(4)
"I ?/J
, A circuit consists of a resistor and a battery.
Increasing the voltage of the battery *hil"
keeprgg the temperature of the circuit constant
would result in an increase in
(l) current, only
(2) resistance,otly
(3) both cument and resistance
(4) neither current nor resistance
r{)
poiotsA andB b
Whet mustbeins€rtedbetu/een
establisha steadyelectic "rrr*itt i:o the incompleto clrorit representedin the diagrambelov?
n;_l
l
LJ^-J
l
(I) sudtch
(2) voltmeter
(3) magpeticfteld source
(4) sourceofpotentialdifference
tf
Ia- a flashlighl a batteryprwides a total of 8.0
rolts to e bulb.If tbeA"ibliChtbulbhasen oDerajiagresistancc
of 8.0ohmslthearreut thrdugh
ihe bulb is
(1) 0.30A
(3) r.5A
(s)o.60
e
(4)r.7A
)
'What
is the curent in a 100.-ohmresistor
connected to a 0.40-volt source of potential
differenceP
( 1) 250 mA
(2) 40. mA
(3) 2.5mA
(4) 4.0mA
n)
Tfre graph below represents--the relationship
betweln-the current ii a metallic conductor and
the potential differenee acrossthe conductor at
eonstanttemPerature.
Currentvs. PotentialDifference
2.0
1.5
3
h
1.0
E
5
o
0.5
1 .0 2 .0 3 .0 4 .0
PotentialDifference(V)
The resistanceof the conductor is
o.roo
@
'@
1.0a
0 2,0
(g f,
rE)
4.0a
. fui electric circuit contains a variable resistor
connectedto a sourceof constantvoltage. As the
resistanceof the variable resistor is increased,
the power dissipated in the circuit
(1) decreases
(2) increases
(3) remainstle same
t1)
The resistanceof a 60.-watt liehtbulb operated
at l20 rclb is approximately
(1)7s0o
(2) 240n
zo)
(3) r20o
(4) 60.n
fn a seria. circuit containing
two lamps, the bat-
apotgnual
difi";;;;;fiJ;il.
ll?:upptio
u.
ure curcnt in
the circuit is 0.10 ;pd-;;-- -,
rr
what rate doesthe cfucuit
use eae1ry?
(1)o.ors
w
(2)o.rsw
(3)1.5W
(4iit#
L t /.
An electric drill operatingat 120. volts drawsa current of 3.00 amperes. What is the total amount of
^
electricaleneiry uied by [tre drill during
v 1.00minute of operationp
(r) s.16
. lq I
(ii r.uo. te I
(z) 2.40x td ]
,-Z)
(4) 4.00x tor i
potentialdiff-ereaceapplied to a fixed
l{ g"
the
a""n"t(Y
fitrLT$#double4poilier
(l) remains the same
(2) doubtes
(B) halrres
t*j dd*pl*
T
l 1 3
LJ"
|. L7
circuitForthe following
R,=.lc*
K, = /6st-
?
_.r fs the circuitseriesor porollel
arl
," {)r/
Whqt is the totol combineor eguivolentresistsnceof tha circuit ?
')
s) av 6hn,
o , l t , 7, a h ^ t
9 6an^:
9
l26 ot,^3
L5) Whqt is the current lowingin the L2 ohmresistor?
) o , z sA ^ y s
,
t o " T sl n p t
o,f'/A^F,
.
.
V o-07A^p:
the 12 ohm
differanceocross)
to the voltogelost (orpotentiol
Compored
L6) resistor,the voltogelost in the 36 ohmresistoris -
,
,
6,rol".
rut
,
Tt,n
io^e
Compored
to the current f lowthroughthe 12 ohmresistor,the currentf low
Z7)
'
throughthe 36 ohmresistor is -
)
6reolr-
,
Less
,
ft,
So'ne
zs) fo r
t
l)
I
Forthe circuitshown-
lJo*
Ru=
l!-,r0,).,r|'f
,,
'^ o.8^^t
;:
?
7A) Is the circuitseriesor parollal
71)
Whot must be the voltoge(or potentialdifference)
of the boftery ?
z)/zov"lts
) 6 vqtts
) 6o Volts
3,
Whatis the currentflowingin the 30dohmnesistor
?
'r/\
t) l,(
O.f A^f
t
3)
n ?lo v"lts
A^,os
a,EAnft
1) 2 , 0 A n y s
Whqtis the totol or equivolant
resistonce
of this"circuit
?
r)
t
HO
,
ehnJ
,
J00
ehnl
Tj
oh^t
,
GO ohns
Which circuit has the smallest equivalent
resistanceP
rltl-r
t
HAA-J
2fl
|
HAAI
t
I
2Q
O
6)
In the electric circuit diagram below, possible
locations of an ammeter and a voltmeter are
indicatedby circlesL,2, g, and 4.
Wherd should an ammeter be located to
correctlv measure the total current and where
should a voltmeter be located to correctly
measurethe total voltageP
(1) ammeter at I and voltmeter at 4
(2) ammeter at2 and voltmeter at 3
(3) arnmeter at 3 and voltmeter at 4
(4) ammeter at I and voltmeter at 2
Gq
v
ohms,6ohmsrandI ohms,are
Threeresistors,4
connectedin parallel in an electric circuit' The
equivdent resistance of the circuit is
(1) lessthan 4 Q
(2) between4Qand8Q
(3) between 10. Q and 18 Q
(4) r8 a
In which circuitwould currentflow throughresistorRr, but not throughresistorR, while switchS is open?
Rl
f---{
A-l
l_
.l
I
+AAr-J
)
R2
(1)
(2)
t A 9.0-rolt tattery is connected
to a 4.Gohm
aad a 5.0-ohm resistor as shoum in the
aiagram belor.
4.0fl
9,0v
s.05l
lVhat is the ctrreut in.the8.0-ohuresistorp
(3) 2.3A
(4) 4.0A
(r)r.oe
(z)r.8a
, In the.circuitdiagranshonnbelon',amrreterhb
t€rcdsIU, emperes.
:"if
10.A
Whatis the readingof ammeterAo?
(1) 6.0A
(3) 20.A
(2) 10.A
(4) 4.0A
(3)
(4)
Alternafe 23 to 31
' L.7L o
For the circuit shown- The totol currentf lowingout of the bottery is
'P}},JAmpt.
A-f
-{r",rfi,.:s
R,'-5o:t-
/ Zt/u/f =
R" lo&'*
z3) wnatis the
d
voltage drop (or potentioldifferenceoryoss)
Rr=50ohms
),5 V"I fs
,
lvotts
t v"l[5
,
!)
tz u.//:
Z'{) Wfrotis the currentf lowingthroughresistorRa?
)) on 6 A^ys
) o,ls A^fs
,
a,3A^,a,
1) ). 2 A^F,
7 g) Whot is the voluefor resistorRa?
r) ZJ -n
;) l$o-n
)
9 Yoo&
ia'.
7L) Tt o forth resistorwereoddedto this circuithowwouldthat eff ect
he voltoge dnop (or pofentioldiff erenceocross)
in the 100 ohm resistor Rs?
,
,/
11.
/dc J\
Tn^n"..ru ;1,
,
Dr..€qse ;l
,
N" eff'^l^
-.|"?l
L l /
For the circuitshown-
l"sv
.2.7 Whotis the totol or eguivolent
of the circuit?
resistonce
, t25sz
D 25n^
"t) ZzS -ru
z) 7s 4
comporedto the voltogedrop in Rr=75ohms,the voltogedrop in
78)
'
Rs : 150 OhmS iS -
)
Ztl^er
(Remember
voltagedrop in o resistoris someos potentioldifferenceacross)
t
\
3) fh*
J-olle.
ia'h
€
zx G-e'^[u'n
to the currentf lowin Ra=50ohmsthe currentf lowin
21) Compored
'
R, ?=150ohmsis D 3
fi^rs
3) Th'
s...,l/u,
5e'te
z) 3X 6.ootu^.
3q
Tf a 4rhresistor were oddedin porollelto the ihree olreodytherethe
currentin R3=l$9 ohmswould
Be
s)H'"Lrf:t
) 3^^lle.
, Bt
\) Lo.3c.
Tf o4thresistor wereoddedin porollelto the three olreodytherethepower
"?l)
/ Usedup or dissipoted
by the circuitwould) g e
p) Bu
Aqre
l^t-"
3.t ,^, C
z) bu
L ess
!
Lo^3
l.roble" s
to questions59 and 60 on the informationand diagra"rrbelor'
Baseyour ansurers
A 10.0-meterlengthof copperwire is at 20oC.The radiusof the wire is 1.0x 104 meter'
CrossSectionof CoPPerWire
@
r = 1 . 0x 1 0 a m
4
i
'
-tdr.r
L)
ot'
Sc c t^1
Jre't
breaof the wire. tll
59 Determinethe cross-sectional
with units']
60 Calculatethe resistanceof the wire. [Showall worh includingthe eqpationandsubstihrtion
s1
6o
m
A
L
P..,bleBaseyour answersto questions48 through51 on the information,circuit &agram,and datatablebelow'
and
In a physicslab, a student usedthe circuit shown to measurethe current th19-ugh
of unknownresistance,fi. The instructor told the stuth" p".";ffi ;;;;;;;;;.;tistor
J;;il.;;;A;#t"h
;; "perate the circuit only long enoughto takeeachrea&ng' The student'srneasurements
are ibcorded in the datatable'
DataTable
Current
(A)
Potential
DroP
0.80
21.4
1.20
35.8
1.90
56.0
2.30
72.4
3.20
98.4
(v)
table, construct a graph on the grid in gour an'saoer
- _- irgctiorw (4&50): Using the inforsratioa in the data
booklet, following the directiois below
"PotentialDrop (V)'" [ti
48 Mark an appropriatescaleon the axislabeled
49 Plot the data points for poteatial drop versus current' tr]
50 Draw the line or curve of best ftt. It]
51 Calsulate the slope of the line or cuwe of best fit' [Show all work, including the equation and substitution
'
with units,l tgl
PotentialDroPvs. Current
g
o
'
o
r!
.E
E
o
o
A
1.0 2.0 3.0 4'0
Current (A)
51
*rO
A 6-ohm resistor and a 4-ohm iesistor are
connectedin serieswith a 6-volt battery in an
operating electric circuit. A voltmeter is
connectedto measurethe potential difference
acrossthe 6-ohmresistor.
In the space
-of in qour affilI)er booHet, draw a
tnir lircuit including the batterry
diagram
resistors,and voltmeter using symbolsfrom the
fuference Tablesfor Physical Saning/Physics,
Label each resistorwith its vdue. lAssumethe
availabilityof any number of wires of negligible
resistance.l [s]
Fi'sl
Non
D"",- j.rrf
Jrov
,J;[\
1i-"ril
nelcr
,^zil1,o,.^l ncler
ull
J ,
Baseyour answersto questions67 through 69 on the information below
A 5.0-ohm resistor, a 10.0-ohm resistor, and a 15.0-ohm resistor are connected in
parallel with a battery. The current through the 5.0-ohm resistoris 2.4 amperes'
67 In the spacein your a,nsu)erbookla, using the circuit symbolsfound in the ReferenceTablesfor Phgsical
SettingtPhysics,draw a diagram of this electric circuit. [t]
68 Calculatethe amount of electrical energy expendedin the 5.0-ohmresistorin 2.0 minutes. lShow all work,
inclu&ng the equation and substitution with units.] lz]
69 A 20.0-ohm resistor is added to the circuit in parallel with the other resistors.Describe the efFectthe
addition of this resistor has on the amount oi electrical enerry e4pendedin the 5.0-ohm resistor in
2.0 minutes. [t]
67-
( a-
67*
To: I
Aasxtees
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1 - f
4-3
7-3
6 ^7
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to-J
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ta -l
t c t- z
Zct-Z
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2\- 4
27^r,
27^Jer
21^3
/t
2t- J
-pq"c
21 -j
Jo ^l
tt -y
tL-\
tr -t
3r -t
3t -t
t{{telao^ L
_/4-t
J7 _t
7r-l
2'l-Z
2t ^)
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17-l
28-J
Z.r-t
3a -l
1t - I
p.5l I ea1
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