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Ahupūngao, Kaupae 1, 202090937M Te whakaatu māramatanga ki ētahi āhuatanga

o te hiko me te autō

9.30 i te ata Rāpare 3 Hakihea 2020 Whiwhinga: Whā

Paetae Kaiaka KairangiTe whakaatu māramatanga ki ētahi āhuatanga o te hiko me te autō.

Te whakaatu māramatanga hōhonu ki ētahi āhuatanga o te hiko me te autō.

Te whakaatu māramatanga matawhānui ki ētahi āhuatanga o te hiko me te autō.

Tirohia mēnā e rite ana te Tau Ākonga ā-Motu (NSN) kei runga i tō puka whakauru ki te tau kei runga i tēnei whārangi.

Me whakamātau koe i ngā tūmahi KATOA kei roto i tēnei pukapuka.

Tirohia mēnā kei a koe te Puka Rauemi L1–PHYSMR.

Ki roto i ō tuhinga, whakamahia ngā whiriwhiringa tohutau mārama, ngā kupu, ngā hoahoa hoki, tētahi, ētahi rānei o ēnei, ki hea hiahiatia ai.

Me hoatu te wae tika o te Pūnaha o te Ao (SI) ki ngā whakautu tohutau.

Kei te Puka Rauemi ngā mōhiohio whaitake mō ngā pātai tātaitanga.

Mēnā ka hiahia whārangi atu anō koe mō ō tuhinga, whakamahia ngā whārangi wātea kei muri o tēnei pukapuka, ka āta tohu ai i te tau tūmahi.

Tirohia mēnā e tika ana te raupapatanga o ngā whārangi 2–23 kei roto i tēnei pukapuka, ka mutu, kāore tētahi o aua whārangi i te takoto kau.

ME HOATU RAWA KOE I TĒNEI PUKAPUKA KI TE KAIWHAKAHAERE Ā TE MUTUNGA O TE WHAKAMĀTAUTAU.

Tohua tēnei pouaka mēnā kāore he tuhituhi i roto i tēnei pukapuka

© Mana Tohu Mātauranga o Aotearoa, 2020. Pūmau te mana.Kia kaua rawa he wāhi o tēnei tuhinga e tāruatia ki te kore te whakaaetanga a te Mana Tohu Mātauranga o Aotearoa.

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TŪMAHI TUATAHI: INE-HIKOTŪ

(a) Inamukumukuahematirakarāhekitehiraka,kawhanatōrungatekarāhe.

Heahateingoaotēneitukanga?

(b) Kataeahekoratewhakaputaiwaengaingāmataeruamēnākarawakatetōpūotetahiwhangakitētahimata.

Tātaihiatekahaotekoramēnākotepūngaoiwhakawhitiahe12.5waepūngoimano (12.5×10–3J),ā,he1.5hēkonamano1(1.5×10–3s)teroaotekora.

karāhe

hiraka

1mirihēkona

2

QUESTION ONE: ELECTROSCOPES

(a) Whenaglassrodisrubbedwithsilk,theglasswillbecomepositivelycharged.

Whatisthenameofthisprocess?

(b) Asparkcanbegeneratedbetweentwosurfacesifthereisasufficientbuildupofchargeononesurface.

Calculatethepowerofthesparkiftheenergytransferredwas12.5millijoules(12.5×10–3 J) andthesparklastedfor1.5milliseconds(1.5×10–3s).

glass

silk

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(c) Koteine-hikotūhetaputapupūtaiaokawhakamahiaheikimiitētahiwhanatōrunga. Ewhakaatuanateine-hikotūitētahiwhanamāteweheiteraukōurakeirarootepūrere.

Itewhakatatatangaatuotematirakarāhewhanakitekōpaemētara,kawhakatawhitiatuteraumaiitepapamētara.

kōpae mētara

matapihi kōata

hononga ki Papatūānuku

matū ārai

rau kōura

papa mētara

tātā mētara

Whakamāramatiatenekehangaotewhanaewhakatawhitiatuaiteraumaiitepapamētara.

Metīmatamātetātuhi,kingāhoahoairaro,ingāwhanakeitētahiine-hikotūngū(tahamauīiraro),ā,inapātatatētahimatirakarāhewhanatōrunga(tahamatauiraro),mewhakaatutetūnga*oteraukōuramengāwhanakeiteine-hikotū.

matira karāhe

ngū

*Ngākōwhiringamōtetūngarau:

Ki te hiahia koe ki te tuhi anō i tēnei

hoahoa, whakamahia te hoahoa ki te whārangi 18.

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(c) Anelectroscopeisascientificinstrumentusedtodetectthepresenceofanelectriccharge. Theelectroscopeshowsachargebytheseparationofthegoldleafatthebottomofthedevice.

Whenachargedglassrodisbroughtclosetothemetaldisc,theleafmovesawayfromthemetalplate.

metal disc

glass window

earth connection

insulation

gold leaf

metal plate

metal stem

Explainthemovementofchargethatmakestheleafmoveawayfromthemetalplate.

Startbydrawing,onthediagramsbelow,thechargesonaneutralelectroscope(belowleft)andthen,whenapositiveglassrodisnear(belowright),showtheposition*ofthegoldleafandthechargesontheelectroscope.

glass rod

neutral

*Optionsforleafposition:

If you need to redraw this, use the diagram on page 19.

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(d) Kataeatētahiine-hikotūwhanatōrarotehonokiPapatūānuku.Kataeatēneiinapātetangatakitekōpaemētara,etakaaiteraukitetātā.

Whakamahiangāhoahoairaro,kawhakamāramaheahaetakaaiteraukitetātā.

Itōtuhinga,me:

• tātuhitetuaritangawhanakeiiahoahoaine-hikotūiraro

• tātuhitetūngaoterauitēnāhoahoa,itēnāhoahoaheiwhakaatuitenekehangaotewhana*

• whakamāramatenekehangaoteraunātetuaritangawhana.

Negatively charged electroscope grounding / earthingIne-hikotūmete whanatōraro honongakiPapatūānuku

*Ngākōwhiringamōtetūngarau:

Ki te hiahia koe ki te tuhi anō i tēnei hoahoa, whakamahia

te hoahoa ki te whārangi 20.

6

If you need to redraw this, use the diagram on page 21.

(d) Anegativelychargedelectroscopecanbegrounded.Thiscanoccurwhenapersontouchesthemetaldisk,causingtheleaftofallagainstthestem.

Usingthediagramsbelow,explainwhytheleaffallsagainstthestem.

Inyouranswer:

• drawthechargedistributiononeachelectroscopediagrambelow

• drawtherelativepositionoftheleafineachdiagramtoshowthemovementofcharge*

• explainthemovementoftheleafduetochargedistribution.

Negatively charged electroscope grounding / earthing

*Optionsforleafposition:

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TŪMAHI TUARUA: ARA IAHIKO PLAY-DOH

IakoaHarrisonitekurahepūkawehikotepoikere(Play-Doh).

(a) Whakaahuatiatererekētangaiwaengaitētahipūkawehikometētahiāraihiko,eaikitenekehangaotewhana.

(b) KahiahiaaHarrisonkitehangaitearahātepe.

Kitewāhiiraro,tātuhiahearahātepemengāwaeewhaiake:

• pūhiko9V

• panahuaki

• 2ngāpūramaōrite

• ine-ngaohikowhaiahoheiineitengaohikopūhiko

• ine-iahiko.

Ki te hiahia koe ki te tuhi anō

i tō ara iahiko, whakamahia te pouaka kei te whārangi 20.

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QUESTION TWO: PLAY-DOH CIRCUITS

HarrisonlearnedinschoolthatPlay-Dohisaconductor.

(a) Describethedifferencebetweenaconductorandaninsulator,intermsofmovementofcharge.

(b) Harrisonwantstocreateaseriescircuit.

Inthespacebelow,drawaseriescircuitwiththefollowingcomponents:

• 9Vbattery

• openswitch

• 2identicallightbulbs

• voltmeterwiredtomeasurethebatteryvoltage

• ammeter.

If you need to redraw your circuit,

use the box on page 21.

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(c) (i) KeitehiahiaaHarrisonkiterapuehiatepūngaoewhakamahiaanaetētahipūramairotoitearahātepemaii(b).

TātaitiatepūngaoewhakamahiaanaetētahipūramaKOTAHIitehaoraKOTAHI,mēnākotetapekeparengaotearaiahikohe150Ω.

Metīmataatumātetātaiitetapekeiahikoirotoitearaiahiko.

(ii) Kataeaetētahipūhiko9Vnoatetukute500mA(500×10–3A)mōtekotahihaoraimuaite“paunga”.

EhiangāhaoraekāaiiaHarrisonngāpūramaimuaite“paunga”otanapūhiko9V?

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(c) (i) Harrisonisinterestedinhowmuchenergyalightbulbusesintheseriescircuitfrom(b).

CalculatetheenergyusedbyONElightbulbinONEhour,iftheoverallresistanceofthecircuitis150Ω.

Startbycalculatingthetotalcurrentinthecircuit.

(ii) Anaverage9Vbatterycansupply500mA(500×10–3A)foronehourbeforebecoming“flat”.

HowmanyhourscouldHarrisonleavethelightbulbsonbeforehis9Vbatterybecomes“flat”?

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(d) KahangaiaeHarrisonheara iahiko whakarara.Etorungāpūrama,A,B,meC,ewhakaaturiaanakitehoahoairaro.

A B C

HeōriteteparengaongāpūramaAmeB,ā,hehauruateparengaotepūramaC.

HeahatemeakakiteaHarrisonmōtetīahoahootepūramaCeaikiAmeB?

Homaitewhakamārama.

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(d) Harrisoncreatesaparallel circuit.Ithasthreelightbulbs,A,B,andC,asshowninthediagrambelow.

A B C

BulbsAandBhavethesameresistance,whilebulbChashalftheresistance.

WhatwouldHarrisonnoticeaboutthebrightnessofthelightbulbCcomparedtoAandB?

Explainwhy.

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TŪMAHI TUATORU: AUTŌHIKOTANGA

(a) Mēnākatatatētahikāpehukitētahiautōkaneketengiraotekāpehukiteahungaotewhaituaautō.

Tātuhiateahungaongākāpehutaungamengāpereheitohuitengiraotekāpehuingātūngaewhakaaturiaanairaro.

A

V

RAKI TONGA

(b) EwhakamahiawhānuitiaanangātaiepahikoputanoaiAotearoaheipupuriingākararehekingāpātiki.Katukunaetetaiepahikongākowherapotooteiahikomātewaea.Ehereaanatewaeakitepōhimātētahirawhikirihou,ewhakaaturiaanaitewhakaahua.

Inarereanateiahikomātewaea,kaputahewhaituaautō.Inarauahepūokokia5cmmaiitewaea,ikiteakotekahaotewhaituaautōhe80nanotesla(8.0× 10–8 T ).

pōhi taiepa hiko

pūoko

5 cm

(i) Tātaihiateiahikoirotoitewaea.

Ki te hiahia koe ki te tuhi anō i tēnei hoahoa, whakamahia

te hoahoa ki te whārangi 20.

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QUESTION THREE: ELECTROMAGNETISM

(a) Bringingacompassclosetoamagnetwillmovetheneedleofthecompassinthedirectionofthemagneticfield.

Drawthedirectionoftheplottingcompasseswitharrowstorepresenttheneedleofthecompasswhileinthepositionsshownbelow.

A

V

N S

(b) ElectricfencesareusedextensivelyaroundNewZealandtokeeplivestockintheirpaddocks.Anelectricfencesendspulsesofcurrentthroughthewire.Thewireisattachedtothepostusingaplasticclip,asshown.

Whenthecurrentflowsthroughawire,itcreatesamagneticfield.Whenasensorwasplaced5cmfromthewire,itwasfoundtohaveamagneticfieldstrengthof80nanotesla(8.0× 10–8 T ).

post electric fence

sensor

5 cm

(i) Calculatethecurrentinthewire.

If you need to redraw this, use the diagram on

page 21.

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(ii) Keitētahitaiepahikonoakoteiahikoote30mA(30×10–3A).

Whakamāramahiamaimēnāmewhakapiki,mewhakaheke,mewaihokiaōriterāneitengaohikokiariteaiteiahikokitētahitaiepahikonoa.

(c) Whakamāramahiatetakeheahaihangaiaaiterawhiemauanaitewaeakitepōhimaiitekirihou,ā,kaahamēnāiwhakamauatonutiaatutewaeakitepōhirākau.

E haere tonu ana te Pātai Tuatoru i te whārangi 18.

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(ii) Atypicalelectricfencehasacurrentof30mA(30×10–3A).

Explainwhetheryouwouldneedtoincrease,decrease,orkeepthesamevoltagesothecurrentisthatofatypicalelectricfence.

(c) Explainwhytheclipthatattachesthewiretothepostismadefromplastic,andwhatmighthappenifthewirewasattacheddirectlyontothewoodenfencepost.

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Question three continues on page 19.

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(d) Ewhakaatuanatehoahoamāmāitearaiahikootētahiperehiko.Hetāruaruatetangiateperehikomātepaopaohaereatehamaitepahū.

Whakamāramatiamaitetukangaepaopaohaereaitehamaitepahūinakatiatepana.

iho rino

wiri ka taea te whakatika

hamapahū

autōhiko

S

ĒTAHI HOAHOA TĀPIRI

KitehiahiakoekiatuhiaanōtōhoahoamaiiteTūmahiTuatahi(c),tuhiakiraronei.Kiamāramatetohukotēheatetuhingakahiahiakoekiamākahia.

matira karāhe

ngū

18

(d) Theschematicdiagrambelowshowsthecircuitofanelectricbell.Theelectricbellmakesarepetitivesoundbythehammercontinuallyhittingthegong.

Explaintheprocessthatcausesthehammertocontinuallyhitthegongwhentheswitchisclosed.

iron armature

adjustable contact screw

hammergong

electromagnet

S

SPARE DIAGRAMS

IfyouneedtoredrawyourdiagramfromQuestionOne(c),drawitbelow.Makesureitisclearwhichansweryouwantmarked.

glass rod

neutral

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KitehiahiakoekiatuhiaanōtōhoahoamaiiteTūmahiTuatahi(d),tuhiakiraronei.Kiamāramatetohukotēheatetuhingakahiahiakoekiamākahia.

Negatively charged electroscope grounding / earthingIne-hikotūmete whanatōraro honongakiPapatūānuku

KitehiahiakoekiatuhiaanōtōhoahoamaiiteTūmahiTuarua(b),tuhiakiraronei.Kiamāramatetohukotēheatetuhingakahiahiakoekiamākahia.

KitehiahiakoekiatuhiaanōtōhoahoamaiiteTūmahiTuatoru(a),tuhiakiraronei.Kiamāramatetohukotēheatetuhingakahiahiakoekiamākahia.

A

V

RAKI TONGA

20

IfyouneedtoredrawyourdiagramfromQuestionOne(d),drawitbelow.Makesureitisclearwhichansweryouwantmarked.

Negatively charged electroscope grounding / earthing

IfyouneedtoredrawyourdiagramfromQuestionTwo(b),drawitbelow.Makesureitisclearwhichansweryouwantmarked.

IfyouneedtoredrawyourdiagramfromQuestionThree(a),drawitbelow.Makesureitisclearwhichansweryouwantmarked.

A

V

N S

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ANAKETAU TŪMAHI

He whārangi anō ki te hiahiatia.Tuhia te (ngā) tau tūmahi mēnā e tika ana.

Ahupūngao, 90937M, 2020

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QUESTION NUMBER

Extra paper if required.Write the question number(s) if applicable.

Level 1 Physics 202090937 Demonstrate understanding of aspects

of electricity and magnetism

9.30 a.m. Thursday 3 December 2020 Credits: Four

Achievement Achievement with Merit Achievement with ExcellenceDemonstrate understanding of aspects of electricity and magnetism.

Demonstrate in-depth understanding of aspects of electricity and magnetism.

Demonstrate comprehensive understanding of aspects of electricity and magnetism.

Check that the National Student Number (NSN) on your admission slip is the same as the number at the top of this page.

You should attempt ALL the questions in this booklet.

Make sure that you have Resource Sheet L1–PHYSMR.

In your answers use clear numerical working, words and / or diagrams as required.

Numerical answers should be given with an appropriate SI unit.

Useful information for calculation questions is available on the Resource Sheet.

If you need more room for any answer, use the extra space provided at the back of this booklet and clearly number the question.

Check that this booklet has pages 2 –23 in the correct order and that none of these pages is blank.

YOU MUST HAND THIS BOOKLET TO THE SUPERVISOR AT THE END OF THE EXAMINATION.

90

93

7M

English translation of the wording on the front cover