:3BB63@303:756B0C:0A
}
Ember is lit by electric lights powered by a central generator. A simple
electrical device—a light bulb—delivers light. To keep the city lit (between
the authorized hours of 6am and 9pm), the city’s electricians need to
understand how these bulbs work.
}
ES¸`SOZZTO[WZWO`eWbVZWUVbPcZPaPcbVOdSg]cSdS`
ab]^^SRb]Q]\aWRS`V]ebVSaScPW_cWb]caZWbbZSPcZPa
ZWUVb]c`V][SaaQV]]ZaO\R]bVS`PcWZRW\Ua-:Sb¸a
bOYSWbT`][bVSP]bb][
BVSPOaS]TO\W\QO\RSaQS\bZWUVbPcZPWaQ][^`WaSR
]Tbe][SbOZQ]\bOQbaBVS3:31B@71/:4==B
1=<B/1BT]`[abVSdS`gP]bb][]TbVSPcZP)bVS
A1@3EB6@3/21=<B/1BWabVSU`]]dSR[SbOZ
PO\RObbVSPOaS]TbVS5:/AA0C:0BVSPcZPWa
TWZZSReWbVO\W\S`bUOaZWYS/@5=<7\aWRSbVSPcZPO
5:/AA;=C<BaS`dSaOabVSaYSZSb]\]TbVSPcZP
V]ZRW\UbVS]bVS`SZS[S\ba]TbVSPcZPW\^ZOQS3OQV
Q]\bOQbWaQ]\\SQbSRb]O[SbOZ1=<B/1BE7@3BVSaS
be]eW`Sa`c\c^bV`]cUVbVSUZOaa[]c\bQ]\\SQbW\Ub]bVS
47:/;3<BObSOQVS\RBVSTWZO[S\bWaOdS`gZ]\UbVW\^WSQS
]TBC<5AB3<[SbOZBVSTWZO[S\b]TO`SUcZO`$eObbZWUVb
PcZPWaOP]cb$TSSbZ]\UPcb]\Zg]TO\W\QVbVWQYBVS
TWZO[S\bWae]c\RbWUVbZgW\b]OQ]WZO\RbVObQ]WZWaWbaSZTe]c\R
W\b]OaSQ]\RQ]WZ^`]RcQW\UO2=C0:31=7:7\ORRWbW]\b]
bVSQ]\bOQbeW`SaOQ]c^ZS]TAC>>=@BE7@3A`c\PSbeSS\
bVSR]cPZSQ]WZTWZO[S\bO\RbVSUZOaa[]c\bYSS^W\UbVS
TWZO[S\baSQc`SZgW\^ZOQS
EVS\g]caQ`SeOPcZPW\b]OZO[^g]c¸`SOQbcOZZgQ]\\SQbW\UbVS
Q]\bOQbab]bVS3:31B@71/:17@1C7BbVObeWZZRSZWdS`^]eS`T`][bVS>=E3@AC>>:G
b]bVSPcZPBVS^]eS`ac^^Zg^`]dWRSaOac`US]TSZSQb`]\aO\3:31B@71/:
1C@@3<BEVS\g]cTZW^bVSaeWbQVbVSSZSQb`]\aO`SOZZ]eSRb]`c\b]bVSQ]\bOQba
BVSQc``S\bWaQ]\RcQbSR]`[]dSROZ]\UPgbVS[SbOZQ]\bOQbaO\ReW`SaPSQOcaS
[SbOZWaO1=<2C1B=@]TSZSQb`WQWbgBVSW\S`bUOaW\aWRSbVSPcZPWa\]bOQ]\RcQb]`
a]bVSSZSQb`]\aQO\¸bSaQO^SbVSW`QW`QcWbBVSSZSQb`]\a`OQSc^]\S]TbVSQ]\bOQb
eW`Sab]bVSbc\UabS\TWZO[S\ba3OQVbW[SO\SZSQb`]\VWbabVSTWZO[S\bbVSW[^OQb
QOcaSa4@71B7=<eVWQVUS\S`ObSaVSOb4]`O\SfO[^ZS]TV]eT`WQbW]\US\S`ObSa
VSOb`cPg]c`VO\Rab]USbVS``SOZZgTOab³bVSg¸ZZVSObc^/abVSgb`OdSZbV`]cUVbVS
TWZO[S\bbVSSZSQb`]\aOPa]`PbVSVSObO\R`SZSOaSaa][S]TWb¸aS\S`UgOaZWUVb=\QS
bVSQc``S\b`SOQVSabVS]bVS`S\R]TbVSTWZO[S\bWbb`OdSZaPOQYR]e\bV`]cUVbVS
aSQ]\RQ]\bOQbeW`Sb]bVSQ]\bOQbO\RSdS\bcOZZgbVSSZSQb`WQOZQW`QcWbb][OYSbVS
Z]]^OUOW\
5]b]eeeeOZRS\Q][T]`[]`SabO\RO`RaPOaSROQbWdWbWSa
– &EOZRS\;SRWO::1
:3BB63@303:756B0C:0A
}
Test your knowledge of the light bulb. Would you be able to repair
Ember’s bulbs if called to do so?
NAME
}
DATE
E]`R0O\Y
/@5=<
1=<B/1BA
3:31B@=<A
4@71B7=<
2=C0:31=7:
3:31B@71/:17@1C7B
47:/;3<B
5:/AA;=C<B
BC<5AB3<
2W`SQbW]\a(4WZZW\SOQVPZO\YeWbVOe]`RT`][bVSe]`RPO\YbVObPSabQ][^ZSbSabVSab]`gG]ceWZZVOdS
b]TW`abc\aQ`O[PZSbVSe]`RaCaSbVS^`SdW]ca^OUSb]VSZ^g]c
BVS/B4<7;3:W\OZWUVbPcZPWa[ORS]TOZ]\UW\Q`SRWPZgbVW\ZS\UbV]TO
[SbOZQOZZSR B35CAB<<
:WUVbPcZPaVOdSOdS`gaW[^ZSab`cQbc`S/bbVSPOaSbVSgVOdSbe][SbOZ!1A=<B1/B
eVWQVQ]\\SQbb]bVSS\Ra]TO\"11733@B/::B7C@171
!BVWabVW\ZS\UbV]T[SbOZaWbaW\bVS[WRRZS]TbVSZWUVbPcZPO\RWaVSZRc^PgO
UZOaa#A5A/:<=BC;
"=\Sbg^S]TW\S`bUOacaSRb]TWZZZWUVbPcZPaWa$<=5/@
#EVS\%3<13@:=BA[]dSbV`]cUVbVSTWZO[S\bbVSgO`SQ]\abO\bZg
Pc[^W\UW\b]bVSOb][abVOb[OYSc^bVSbc\UabS\BVSW[^OQbQOcaSa&<B=7417@
$BVST`WQbW]\^`]RcQSRPgbVSQc``S\bVSObabVSSZSQb`]\aeVWQV`SZSOaSbVSVSObS\S`UgOa
65B:7
%BVSTWZO[S\bWaO``O\USRW\O0C=3:217=:W\]`RS`T]`Wbb]TWbW\O
a[OZZa^OQS
%BVSTWZO[S\bWaO``O\USRW\OR]cPZSQ]WZW\]`RS`T]`Wbb]TWbW\Oa[OZZa^OQS
$BVST`WQbW]\^`]RcQSRPgbVSQc``S\bVSObabVSSZSQb`]\aeVWQV`SZSOaSbVSVSObS\S`UgOaZWUVb
BVSW[^OQbQOcaSa&T`WQbW]\
#EVS\%SZSQb`]\a[]dSbV`]cUVbVSTWZO[S\bbVSgO`SQ]\abO\bZgPc[^W\UW\b]bVSOb][abVOb[OYSc^bVSbc\UabS\
"=\Sbg^S]TW\S`bUOacaSRb]TWZZZWUVbPcZPaWa$O`U]\
!BVWabVW\ZS\UbV]T[SbOZaWbaW\bVS[WRRZS]TbVSZWUVbPcZPO\RWaVSZRc^PgOUZOaa#UZOaa[]c\b
"SZSQb`WQOZQW`QcWb
:WUVbPcZPaVOdSOdS`gaW[^ZSab`cQbc`S/bbVSPOaSbVSgVOdSbe][SbOZ!Q]\bOQbaeVWQVQ]\\SQbb]bVSS\Ra]TO\
BVSTWZO[S\bW\OZWUVbPcZPWa[ORS]TOZ]\UW\Q`SRWPZgbVW\ZS\UbV]TO[SbOZQOZZSR bc\UabS\
5]b]eeeeOZRS\Q][T]`[]`SabO\RO`RaPOaSROQbWdWbWSa
– &EOZRS\;SRWO::1
:3BB63@303:756B0C:0A
of Ember by building a light bulb of your own.
} Help rekindle theTheCity
}
next two pages will show you how.
;/93G=C@=E<
G]c¸ZZ\SSR(
=<3A;/::8/@E7B6/1=@9AB=>>3@:72
/7<16</7:
7;>=@B/<BA/43BGB7>A
BVWaSf^S`W[S\b\SSRab]PSR]\SeWbVO\ORcZb
^`SaS\bO\Rac^S`dWaW\U
/ZeOgaeSO`aOTSbgUZOaaSaO\RUZ]dSaeVS\R]W\USf^S`W[S\ba
0SQO`STcZVO\RZW\UbVSTWZO[S\baeVS\bVSgPc`\]cb´
bVSgeWZZPS6=B
<SdS`^ZOgeWbVeOZZa]QYSba]`V]caSV]ZRSZSQb`WQQc``S\ba
B6@33433B=4A673:2321=>>3@E7@3
1=>>3@E7@3E7B6/1=/B7<5=4>:/AB71
=<3$D=:B0/BB3@G´<=B/1/@0/BB3@G
B67<7@=<E7@3´B6303ABA=C@134=@B67A7A
C<@/D3:32>71BC@36/<57<5E7@3
HE WOULD KNOW
A17AA=@A
5SbAbO`bSR
1cbbVSQ]^^S`eW`SW\b]be]S_cOZZS\UbVaOP]cb TSSbZ]\U1cb]TT
O\W\QV]TbVSaVWSZRW\U^ZOabWQQ]ObW\UObSOQVS\R]TbVSab`O\Ra
“To invent, you need a
good imagination—
and a pile of junk.”
-Thomas Edison,
inventor of the light bulb (1879)
>c\QVbe]V]ZSaW\b]bVSQ]`YcaW\UbVS\OWZ
!>caVbVSeW`SbV`]cUVbVSV]ZSaW\bVSQ]`Ya]bVOb
OP]cbbe]W\QVSa]TbVSeW`SVO\U]cbbVS]bVS`aWRS
1=>>3@E7@3
1=@9AB=>>3@
"AVO^SV]]YaObbVSaV]`bS\R]TbVSQ]^^S`eW`Saa]
bVObg]cQO\beWaba[OZZab`O\Ra]TW`]\eW`SO`]c\R
bVS[b][OYSOTWZO[S\b
#BeWabaSdS`OZab`O\Ra]TW`]\eW`Sb]USbVS`O\R
ab`SbQVbVS[OQ`]aabVSUO^PSbeSS\bVSbe]Q]^^S`
V]]Yab]T]`[bVSTWZO[S\b
7@=<
E7@3
$D=:B
2@G13::
0/BB3@G
$4WbbVSQ]`Yab]^^S`eWbVTWZO[S\ba\cUZg]\b]bVSXO`
%1O`STcZZgV]]Yc^P]bVQ]^^S`eW`SS\Rab]bVS
PObbS`gO\ReObQVg]c`PcZPZWUVbc^
031/@34C:´B6347:/;3<B031=;3AD3@G6=B2=<=BB=C16
/RO^bSRT`][3RWa]\7\dS\ba–A[WbVa]\WO\7\abWbcbW]\
CaSRPg^S`[WaaW]\4]`[]`SU]b]
Vbb^(W\dS\bW]\a[WbVa]\WO\]`UQS\bS`^WSQSaSRWa]\
5]b]eeeeOZRS\Q][
T]`[]`SabO\RO`RaPOaSROQbWdWbWSa
– &EOZRS\;SRWO::1
:3BB63@303:756B0C:0A
@3AC:BA4=@;
<O[S(
2ObS(
<]ebVObg]cQO\PcWZROPcZP
V]eZ]\UQO\g]c[OYSWbUZ]e-
BV][Oa3RWa]\bVSW\dS\b]`]TbVSZWUVbPcZPb`WSR
Vc\R`SRa]TbW[SacaW\U[O\gRWTTS`S\b[ObS`WOZab][OYS
TWZO[S\babVObe]cZRUZ]eO\R\]bPc`\]cb3RWa]\eOa
^S`aWabS\b´VS\SdS`UOdSc^b`gW\Uc\bWZVWa^`]XSQbe]`YSR
6]eZ]\UQO\g]c[OYSg]c`Q]^^S`TWZO[S\bUZ]e-6]e
[O\gab`O\Ra]TW`]\eW`S[OYSbVSZ]\USabZOabW\UTWZO[S\b-
BVSP`WUVbSabTWZO[S\b-0S^S`aWabS\b
5£
)&-*()
5
&
&
4
¢
JU
06
BDJSDV
)&-1:
0
O
J
5
T
4
O
%
P
3
S
80
FDU
OU
XPGFM PGUIFDVSFSOFFSHZ
P
M
G
F
I
BUI
¡U
BO
DVSSFOU DJSDVJU¡UIFBQXJSFGSPNDLUPUIF
P
HI
CB
BM
FMFDUUSJGD MPXTUISCPBVUUFSZ
BSOPENQPTJUJWFU
J
BT DFMJLFB VTVBMMZG
TPVS HZTPVSDF
PGUIIFFDJSDVJU
O
P
J
U
FOFSBUJWF
Q
V
U
FSS
OFH
UIFJFODUUSJDJUZXOIFHOCBSFXJSFT
¡
U
J
V
D
J
M
JS
TIPSUMBDSGMPXPPGGUFFOCZDSPTT
V
H
SF PSUFOFE
JTTI
;/B3@7/:A
RESULTS FORM
BSab
<c[PS`
STOPWATCH
<c[PS`]Tab`O\Ra
]TQ]^^S`eW`S
PENCIL
<c[PS`]TaSQ]\Ra
TWZO[S\bZWb
0c`\]`UZ]e-
!
"
#
B67<9/0=CB7B
BVSSZSQb`WQZWUVbPcZPe]`YaPSQOcaSg]cVOdS[ORSOQ][^ZSbSQW`QcWbeWbVSZSQb`WQOZQc``S\bTZ]eW\U
]cbT`][bVSPObbS`gbV`]cUVbVSTWZO[S\bO\RPOQYb]bVSPObbS`gBVSSZSQb`WQWbgTZ]eW\UbV`]cUVbVS
eW`S^`]RcQSaVSObO\R[OYSabVSTWZO[S\bUZ]e/aV]`bQW`QcWbW\O\SZSQb`WQOZagabS[QO\QOcaSOTW`S
WTbVSeW`Sa]dS`VSOb
5]b]eeeeOZRS\Q][T]`[]`SabO\RO`RaPOaSROQbWdWbWSa
– &EOZRS\;SRWO::1