GRADE 11 PHYSICAL SCIENCES _ - Pearson High School

EASTERN CAPE
GRADE 11
PHYSICAL SCIENCES _ FIRST PAPER
NOVEMBER 2OOS
150
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Th s qlestion paperconsisls ofl4pages a
and ai answer

A.sw€rths sect on on th€ atached ANSWER SHEET.
QUESTION 1: ONE-WORD ITEMS
Give ONE word/rem lor EACH of the tot owing d€scr pr ons Wr te only lhe word/rerm nen
ro the queston nuhber (1 I 1.5)on the anached ANSWER SHEET
1.1 The type of semiconductorrhar forms wtren s icon s dop6d wilh
1 2 The mt o of rhe f.rce ot fricuon to th€ norma force
1 3 Th€ ab rty oflh€ tens oflhe eye to change its foca length.
1.4 Th€ raw used to del€rm ne the d reclion ofthe nduced cur.enrwhen a
magnet is moved reialive ro a coi.
1.5 A bu d-up of eteolrc charge on lh€ slrface of an objecr
OUESTION 2; FALSE ITEi,IS
(r)
(1)
(1)
(1)
(1)
tst
'rhe folowing starefientsgven in QUEST|ONS2I to 25 are FALSE. Wrtelhe@red
slatem€nr next to the question number(21 2.5)on rhe aflached ANSWER SltEEt
2 1 An exampt€ of a cass 3 rever is wh€n you push a wheetbarow I ted with
2 2 N€lrton s Second Lawdelnes lhe retarionship behreen forDe, mass and
veloc ly ot an objecr.
23
You hear dogs bart c earer.( n ght due lo lhe resonance ol sound waves
The vonage ncreases and the charce dedease wh e! capacitor
nduc€d durins electromaqnet c nducton
(2)
(2)
t2)
t2)
(2)
I10l

pHYsrcAL sc'ENcES:lllSMlgB
qUESTION 3: MULIIPLE-CHOICE OUESTIONS
- o'dr!cii4d' ro e io'rotr qo 6Jon Ldl
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*-'r:" ;."- .';;:,; ij e, r".""
: :.hed ANSWEF SHEET ".r."
3 1 Ju rus stands on a bathroom scale ii a ln H s we qhl s 637 N The rcadinq
on thescaewil be 637 N
A onlv iflhe lilt is a@e eratng upwards
B only il lhe lift accelerat€ s d ownward s
c fthe ln moves downwads wi|r a conslanl velocitv or rit stands stll
D only if lhe Lift stands st ll
,- lheo" r""o.r'ro "o'd
-
;"i^,1;
"
"","d , oouo ed 'h' 'o1P
od
^p' ts' oo d r rhc !dno'
D '/,F
tni h oNL or lnc roro^rs q do
;'::;;",";;;;;.
di"ran.e d from th€ Po ntcharge
" "; -.'e'd!ou" o"pon h"{" nd'e
(2)

3.4 Which oTlhe lolowhg sr.
A The €sistance ofa pi€ce ofoatium decrcases as
oI n oh.om€ w @ des€s66s as the
ol si icon decreases as the t6mp66lue
D
As lhc "lere-ro'atAhohoatsup,
the re\sEn@ dFcEaB€)
aslronauls ar6 do ng a spacewalk outs de a sp.eh p. oneastrcnaut
that the olher one is rng ng a bett, but €nnot hear it. Thjs means thal
t2)
B
qhl,a\es -c- lEvelr-rough. !
sound {aves can rove Im
'qh
a €cu-n od ^ol, qhtwave)
botli lght and sound waves can move through s vacuum.
neith6r ight norsound waves.an move thbugh a vacuum.
\2)
110l

INSTRI]CTIONS AND INFORMATION
1 Answe.SECTON B ntheANSWER BOOK.
2 The romu ae and subsltulions musl be shown n ALL ca cu atons
3 Round offyouranswers ro TWO decifratpaces
4 Sbnea.hqueslion on a NEW PAGE
A m n busrax lrave s at 30 m sr When the drv€r sees a Aroup ofieahers
crossnglheslrcel he mnedlaleyappleslhebEkesandbrnqsthennibuslax
lo aslop n 7.5s The frassollhe minbus laxiand the passengeEis 3 600 kg
4.1 Ca cu ale llre force lhat srequned lo brlng llre mnbus lax to aslop (7)
42 Trre rarc€ thatyou ftlculated nOUESTON4I sthemaxmumforcelhat
can be app ed by lhe takes. Th€ number or passengec is increased so
thar the tola mass oJ the m n bus lax and lhe passenceG s iow c 000 k9
Us n0lhs lnfomalon slate how lh€ fol owing w I be nfluenced:
(Use on y INCREASES DECREASESoT REMAINS THESAIME as your
,4 21 The tme taken to stop the mm bus tax
4 22 The naoiiludeorlh€ acceeralon.
4 2 3 The sloppinq d slance oflhe min bus laxi
{r)
ta2)
\2)
c3 By ref€dng Io your answers n OUEST ON 4 2. what advce wou d you
livelo mnibus t:x dnvers conc€rnng lh€ nunb€r or passengeG and
safety Gv€ a reason loryouradvce (2)
115t

T
QUESTION5
And lo, his sisterNoniand th6ir baby sister. Zuki, play on u seesaw in the psrk.
And les mass is 60 kg, Nomi's mass is40 kg whit€Zukis ma$ is 9 kg. Consider
lhe fol owing d aqEfr and answer the quest ons that tottow:
Nomisils 2.5 h iiom the fulcrum (pivo!), white And t€ sir6 2 m fiom the
5.1 D€lorminelheweights oleach ofAnd le, Nom and Zuki.
5 2 Use calculalions lo ndlGte in whal dtreclion th6 seesaw wilt tum white
Aidie and Nomisiton ll
5.3 Howrartron lhetu crum and on whose sde (AidjLes o. Nomis)musrzuki
sit to balan.e th. s..i.#
(3)
(4)
(4)
1111
\
..r s
\

During a polce invesli$lion inloa €r acdident. lhe forens c unit rcconslructs the
accdent carA, mass I 300 k! col des head{n with cr B frass 1 600 kg. which
is lEverLng in the opposte direclion as shown in lhe sk€lch. ourng lhe colls on.
the cars connecl and move logether as a combinalon and eventually @me lo a
.rd 0..'. Tc.9.phor.'6 .loi..ol d ^oL
nolhe.o'io' o..'
E
9.- "bo,e
dnd o_ lhF 9rdoL .odo lhF rolo{i 0
f.arA belore the collson.
6 2 D€lerm ne th€ ve ocly olcarA mmed ately aft€r th€ co lision
6 3 calculare rhe vel.c ly of€r a ju5Lbefore Llrc collelon
6.4 NameTHREEsafety measurcslhalca mafufaclureF use nmodem €rclo
make it safs for lh€ passengeG n the €r durno a col s on ike th s
6 5 Which one olyod eiswers n OUESTION 64 s based on NeMon s FiEt
(3)
12)
(6)
(3)
(2)
r5t

i the dialrams berou A B and C reprerenL€l€mentsrhaL.anbe.onducror\,s€m
Ihe conduclor (Wite on yA, B or c). Gveare.son
ways lo ncrease the conductvly ola semi-conductor
dev ce nwhdh s€mi conductors :re !q..1
(2)
t2t
(1)
t5t

Dr Murrer. an ootom€irist l€sls p€op es v slon:nd fnds o!l whetlrer lhev have
0,"0i"., *fi ri'" t
"
g,t sh€ (h€n prcs.rb€s s asses n od€r lo mpovo v slon
.lennv looelh€rwlh rrerdauqlr(er, Helen .nd hermolher, Aunlv Balbara decde
i" ui,.ri.,-** t""t",t wb' Nruler .reinvtels Dr Mu erlhar sh€ enrDvs
"""'""" " "'., oaa op.rb I rooao
",,",1* " ""po'b"
,"nF ad0 ".
tsp cn who is stl al s.hoo 1€ s Dr Muler lhat she can see c earv when h€r
t'.r,erwrtesontneoord butstruggesloreadkomhertextbookvrhenshe
*"r", ir," *p* **. "
.r'tp pa n ii hcr ev-cs which lhen d sappears when
she rro ds the nagaz ne fu.lh€r kon h€r eves
3 1 Name lhe mosi probable eve d-cfecls that EAoH oflhe lhree fam v
3 2 Describe lhe poss bl€.auses of EACH ofthe eve prob ems
33 Make separale sket.hes to nd cate e..h ofthe la lo$ nq:
3 31 The eye deietl knowi as shorl sqhtedness
3 3.2 Howlh€ defecl n ouEsl oN 3 3 1 can be conected bv us ng !
(3)
(21
l14l
udvthelvpe of magesthat 1'anform Shetlr€i
"-.".g..,".m"'e
Draw ar accurale ray di:lra
91 I Thefoca lenqlh.Ilhe
91.2 The he ghl oflhe mage
9 2 C..u at€ the magnir..iion
I 3 Name THREE propenes of lh-"imao€ f theoble'l s p:'e'r 30 nmirom
1r)
(21
(3)
t11l

FHYSTCAL scrENcEs - FrESl tAPl!
,,* ris ." r
After lhe An Frcnc€ Fl€ht447 plene wenl m ssrnc overthe Ar
'nr '
Ocean on l
:-;; i;; ;"ii""" '-.""""."' ' r'-. o d" e eD'o,o ri o I e ird Ldo'
ofIh€ plane andthe so-caled bLack box
Th€submarnedivedloadeplholl Or5mbelowthesurfaceortheocean Apulse
*ji !""ii.. rn" i,t-.i"a. soNAR nstruh€nrs and it €flecr€d ofi rhe wrcckae€
,ir-r,-" o.n* o rt
"
*" The pu s€ relumed 4 30 s aner I
il::;J,l;:i:;;'.li;:;;:;"r rn"ii.r"i r" rr,"
"** " I s-:z ' "'
'10I What s |re d stance from the submanne b lhe wreckaqe olihe plane (4)
lO 2 Whalreihe d€pih ol rre o.ean alrhatspe' l'' ponL)
(r)
t5l
Cons derthe lolow ng q€ph concem nq the speed ol sound n dLfferent hediums:
speed ofsou.d in difier€nt medilms
llj::99
112
ln whch phase does solnd lravellhe fastest
c ve an expLanauon lor your answer n QUESaloN 11 1
Thc varde oflhe sDeed ol sound n seawater is the va ue al0 "c Lf (
;e lound thal tlre t€mperalur€ ofthe seawlter s 17'C how wDuld lh€
spe€d ol sound in lhe seawaler change
I'h..SE I'OM INCREAS€S DECREASES' STAYS THE SAME) (2)
0)
L2)
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1l 4 Breflyerpa'nyour.ho(e nQUESTIONIl J
d. oo. rountai .Jo00aaoor.>ed e\et -ruy,1ea.L,e>
the spe.d ofsolnd. She does not oblain the sam€ va ue as n the
above table Whtch of rhe to lowing vatues is rhe mosl prcbabLe that she
rr 6 Bref y €lparn your.horce nouESToN Ir.5.
12)
110l
QUESTION 12
Asmal,cofducringsphere,X wirhachargeol+2xlq6Candwlhanunk.ownfia
m, is suspended by an inelaslic thread ofn6gtgib e mass wh ch is lied to poinl p
AnorhF .n:r o-oudi a"ohe€.v ond '.quo.Fo.tand,wlhac-arqed6r
tOo
is moved low.rds ) uni ihetrcenlros are l2o mm ap:rl
121 ca cu at6 th€ haqnilud€ and d re6t on ol the e ectrosialic force thal
sph€re Y exerts oi sphere X
12.2 SphereY smovedunt i ouches sphere x and tisth6nmovedbackto
itsorqinalDosilion
Calcurate lhe new ch.rge on each sphere afrerthey touched.
12.3 ln a thundeBrorm, chaQ€s buid up in ctouds due lo different hovemenrs
ola r,Gindbps and .e When tho polent at difference behre€n a
coliecton ol pos live charges and negetive charces becomes big enough,
a ighhing fash occurs
Name TFIREE pr€caul ons thal one can lake in oder to orolect onesetf
I

QUEST|Oi{ t3
ln an attempl tov€iryohm s Law, a gEup of leamers nvest qate ihe
r€lationship belween pot€nt al difforence and eleclnc cunent Th€yare
Drcvid€d with lh€ to lowin€ apparalus lr set up the circuit:
. Rheostal (Efiable €si6tanc€)
t ConnoclinS wires
t Batlery/Power so!rce
Th€ Gble bd@ shss the res! ls obtained du ng lh€ investigalion
016 0,32
3,0
7.A
13.1 DGw a circull dag€m olthe coiiectset-up oflh6 appa.atus forths
13.2 Fom u lal€ a n investig alive q u€stion for lhe above nvestsalion
133 Whl.n vadable musl be kepl @nslantdudng the above nv€stqaton
13.4 O6w a g6ph of polent aldiflerence vetsus cunenl on the anached graPh
paper. odwtheaxesand choosean app@p.iate scale Polandthen
(3)
(2)
(r)
(4)
135
13.6
Fbd ths graph, w o down the malhematmlre allonship between
polential dilferenc€ and cur€nt.
Ma.t on your s€ph the poini x b€yond whch ohm s Law no onger
O@s th; Gsistance INCREASE or DECREASE beyond this poi
12)
(1)
(1)
t14l

olJEsTtoN 14
Acommonuseof transfomersrs ncel phonechargeFwhichopeGtebelween
6V and l2V. Aleamer s given a lransfom€rthathas550tums onthe primary
@ r ,nd 25 turns oi rhe secondary co r rrisDUaaed nroawa sodketof220v.
141 what type oflransfomer s 9 ven to ihe leaher Give a reason ror your
14.2 show bycalculalion ililcoud be possib e to use this lranslomd in acel-
(3)
(4)
14.3 whar chanae must be made 10 lhe secondary durcntlo make lhe cuirent
sulable for lse n cel 'phone chargeE (2)
144 Nameandexplaintheprincipeonwhlch:lmnsformerworks. (3)
112l
IOTAL: SECTION Br 125
. GRANDTOTAI: 150