2212-6510 13 pages

M12/4/PHYSI/SPM/ENG/TZ1/XX

Thursday 10 May 2012 (afternoon)

PHYSICSSTANDARD LEVELPAPER 1

INSTRUCTIONS TO CANDIDATES

• Do not open this examination paper until instructed to do so.• Answer all the questions.• For each question, choose the answer you consider to be the best and indicate your choice

on the answer sheet provided.• A clean copy of the Physics Data Booklet is required for this paper.• The maximum mark for this examination paper is [30 marks].

45 minutes

© International Baccalaureate Organization 2012

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1. Whatistheorderofmagnitudeofthemass,inkg,ofanapple?

A. 10–3

B. 10–1

C. 10+1

D. 10+3

2. The diagram below shows the forces acting on a block ofweight W as it slides down a slope.Theanglebetweentheslopeandthehorizontalisθ,thenormalreactionforceontheblockfromtheslopeisNandfrictionisnegligible.

N

W

θ

θ

θ

Whichofthefollowinggivestheresultantforceontheblock?

A. W sinθ

B. W cosθ

C. N sinθ

D. N cosθ

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3. Thevelocity–timegraphforanacceleratingobjectthatistravellinginastraightlineisshownbelow.

velocity/ms–1

5.0

4.0

3.0

2.0

1.0

00 1.0 2.0 3.0 4.0 5.0

time/s

Whichofthefollowingisthechangeindisplacementoftheobjectinthefirst5.0seconds?

A. 25.0m

B. 12.5m

C. 5.0m

D. 1.0m

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4. Anobjectfallsverticallyfromrest.Airresistanceactsontheobjectanditreachesaterminalspeed.Whichofthefollowingisthedistance–timegraphforitsmotion?

A.

distance

00 time

B.

distance

00 time

C.

distance

00 time

D.

distance

00 time

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5. ApendulumswingsbackandforthinacirculararcbetweenXandY.

X Y

Thependulumbobis

A. alwaysinequilibrium.

B. onlyinequilibriumatXandY.

C. inequilibriumasitpassesthroughthecentralposition.

D. neverinequilibrium.

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6. Ablockofmass m ismovingatconstantvelocity v alonga frictionless surface that isheighth abovetheground.

v

h

Whichexpressiongivestheworknecessarytomaintaintheconstantvelocity?

A. mgh

B. 212

mv

C. 212

mgh mv+

D. zero

7. Whichofthefollowingisanelasticcollision?

A. Tworailwaytruckscollideandtheylinktogether.

B. Tworailwaytruckscollideandtheydonotlinktogether.

C. Twogasmoleculescollideandeachchangesdirection.

D. Twogasmoleculescollideandabondisformedbetweenthem.

8. Acarmovesatconstantspeedaroundahorizontalcirculartrack.Theresultantforceonthecarisalwaysequalto

A. theforwardforcefromtheengine.

B. thesidewaysfrictionbetweenthetyresandthetrack.

C. theweightofthecar.

D. zero.

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9. Thetotalpotentialenergyandrandomkineticenergyofthemoleculesofanobjectisequaltothe

A. heatenergyintheobject.

B. internalenergyoftheobject.

C. thermalenergyintheobject.

D. workstoredintheobject.

10. Whichofthefollowingcorrectlydistinguishesbetweentheevaporationandtheboilingofaliquidunderatmosphericpressure?

Evaporation Boiling

A. takesplaceatonefixedtemperature occursatthesurfaceoftheliquid

B. takesplaceatalltemperatures occursatthesurfaceoftheliquid

C. takesplaceatonefixedtemperature occursthroughoutthebodyoftheliquid

D. takesplaceatalltemperatures occursthroughoutthebodyoftheliquid

11. AnidealgashasanabsolutetemperatureT. Theaveragerandomkineticenergyofthemoleculesofthegasis

A. independentofT.

B. equaltoT. C. proportionaltoT.

D. inverselyproportionaltoT.

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12. Anobjectisundergoingsimpleharmonicmotion(SHM)aboutafixedpointP.ThemagnitudeofitsdisplacementfromP isx.Whichofthefollowingiscorrect?

Magnitude of resultant force Direction of resultant force

A. proportionaltox towardsP

B. inverselyproportionaltox towardsP

C. proportionaltox awayfromP

D. inverselyproportionaltox awayfromP

13. Anobjectundergoessimpleharmonicmotion(SHM).Thetotalenergyoftheobjectisproportionalto

A. theamplitudeoftheoscillations.

B. thetimeperiodoftheoscillations.

C. thefrequencyoftheoscillations.

D. themassoftheobject.

14. Whatregionoftheelectromagneticspectrumincludeswavesofwavelength5×10–8m?

A. X-ray

B. Ultraviolet

C. Infrared

D. Microwave

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15. Arayoflighttravelsfromavacuumintoglassasshownbelow.

vacuum

glass

Inglass,lighthasspeedv .Inavacuum,lighthasspeedc.Whichofthefollowinggivestherefractiveindexofglass?

A.cv

B.vc

C. sinsin

cv

D. sinsin

vc

16. Theampereisdefinedintermsof

A. powerdissipatedinawireofknownlength,cross-sectionalareaandresistivity.

B. potentialdifferenceacrossaresistanceofknownvalue.

C. numberofelectronsflowingpastapointinacircuitinagiventime.

D. forceperunitlengthbetweenparallelcurrent-carryingconductors.

17. Abatteryofemf6.0Visconnectedtoa2.0Ωresistor.Thecurrentinthecircuitis2.0A.Theinternalresistanceofthebatteryis

A. zero.

B. 1.0Ω.

C. 3.0Ω.

D. 4.0Ω.

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18. Whichofthefollowinggivestheresistancesofanidealammeterandanidealvoltmeter?

Resistance of ideal ammeter Resistance of ideal voltmeter

A. infinite infinite

B. zero infinite

C. infinite zero

D. zero zero

19. AmassatpointX givesrisetoagravitationalfieldstrengthg atpointPasshownbelow.

X P

AnidenticalmassisplacedatpointYasshownbelow.

X P Y

TheresultantgravitationalfieldstrengthatPisnow

A. greaterthan2g.

B. between2gandg.

C. betweengandzero.

D. zero.

20. Theelectricfieldstrengthbetweentwooppositelychargedparallelplates

A. hasthesamevalueeverywherebetweenthetwoplates.

B. decreasesfromthepositiveplatetothenegativeplate.

C. islargerattheedgesthaninthecentre.

D. issmallerattheedgesthaninthecentre.

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21. Threeparallelwires,X,YandZ,carryequalcurrentsintothepage.

WhicharrowrepresentsthedirectionofthemagneticforceonwireZ?

A.

B.

C.

D.

22. Whencomparedwithbetaparticlesandgamma-rayphotons,alphaparticleshavethegreatest

A. mass.

B. penetratingpower.

C. rangeinair.

D. speed.

23. Whichstatementcorrectlydescribestheprocessofnuclearfusion?

A. Thejoiningtogetheroftwosmallatomstocreatealargeratom.

B. Thesplittingupofalargeatomtocreatetwosmalleratoms.

C. Thejoiningtogetheroftwosmallnucleitocreatealargernucleus.

D. Thesplittingupofalargenucleustocreatetwosmallernuclei.

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24. Thefractionoftheworld’senergyconsumptionprovidedbynuclearenergyis

A. lessthan0.2%.

B. between0.2%and2%.

C. between2%and20%.

D. greaterthan20%.

25. The burning of fossil fuels in power stations produces greenhouse gases. Another potentialenvironmentalproblemisthat

A. theemissionscandestroytheozonelayer.

B. theemissionscancauseacidrain.

C. themaximumefficiencyisverylow.

D. theenergydensityofthefuelsislowcomparedtorenewableresources.

26. Inanuclearpowerstation,inordertoincreasethechancesofachainreaction

A. kineticenergyisremovedfromtheneutrons.

B. kineticenergyisgiventotheneutrons.

C. someneutronsareabsorbed.

D. extraneutronsareadded.

27. Theoriginalsourceoftheelectricalpowerproducedbyawindgeneratoris

A. theSun’sradiatedenergy.

B. thegravitationalenergyoftheSunandtheMoon.

C. nuclearenergystoredwithinatomsintheEarth’satmosphere.

D. theEarth’sinternalenergy.

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28. Increasingthetemperatureofablack-bodywillhavethefollowingeffectonitsemissionspectrum.

Total power radiated Peak wavelength of radiation

A. increases decreases

B. staysthesame decreases

C. increases staysthesame

D. staysthesame staysthesame

29. Anaturalprocessthatcouldcauseanincreaseinglobalwarmingis

A. anincreaseintheradiusoftheEarth’sorbitaroundtheSun.

B. anincreaseintheabsorptionofcarbondioxidebyseawater.

C. adropinmeansea-level.

D. deforestationasaresultofnaturalecosystemchanges.

30. Whatistheunitforthecoefficientofvolumeexpansion?

A. m3K–1

B. m3

C. K

D. K–1