2211-6516 16 pages

M11/4/PHYSI/SPM/ENG/TZ2/XX

Wednesday 11 May 2011 (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.

45 minutes

© International Baccalaureate Organization 2011

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1. Whichofthefollowingwillreducerandomerrorsinanexperiment?

A. Usinganinstrumenthavingagreaterprecision

B. Checkingthecalibrationoftheinstrumentused

C. Checkingforzeroerrorontheinstrumentused

D. Repeatingreadings

2. A body accelerates from rest with a uniform acceleration a for a time t. The uncertainty ina is 8% and the uncertainty in t is 4%. The uncertainty in the speed is

A. 32%.

B. 12%.

C. 8%.

D. 2%.

3. Whichofthefollowingliststwoscalarquantities?

A. emf,momentum

B. emf,weight

C. impulse,kineticenergy

D. temperature,kineticenergy

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4. Thegraphshowsthevariationwithtimetoftheaccelerationaofanobject.

a/ms–2

5

4

3

2

1

00 2 4 6 t/s

Whichofthefollowingisthechangeinvelocityoftheobjectinthetimeinterval0to4s?

A. –8ms–1

B. –4ms–1

C. +4ms–1

D. +8ms–1

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5. Acaracceleratesfromrest.Theaccelerationincreaseswithtime.Whichgraphshowsthevariationwithtimetofthespeedvofthecar?

A. v

0

B. v

00 t 0 t

C. v

0

D. v

00 t 0 t

6. Whichofthefollowingistheconditionforabodytobeintranslationalequilibrium?

A. Theresultantforceonthebodyinanydirectioniszero.

B. Thevelocityofthebodyinanydirectioniszero.

C. Noexternalforceisactingonthebody.

D. Noworkisdoneonthebody.

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7. Astoneattachedtoastringismovinginahorizontalcircle.Theconstantspeedofthestoneisv.Thediagrambelowshowsthestoneintwodifferentpositions,XandY.

Xv

Y v

Whichof the following shows thedirectionof the changeofvelocityof the stonewhenmovingfrompositionXtopositionY?

A.

B.

C.

D.

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8. ThegraphshowsthevariationwithforceFoftheextensionsofaspring.

F/N

20

15

10

5

00 2 4 6 8 s/cm

Theworkdoneinchangingtheextensionofthespringfrom3.0cmto6.0cmis

A. 15Ncm.

B. 30Ncm.

C. 45Ncm.

D. 60Ncm.

9. Theenergyofthemoleculesofanidealgasis

A. thermalonly.

B. thermalandpotential.

C. potentialandkinetic.

D. kineticonly.

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10. Oil with volume V has specific heat capacity c at temperature T. The density of oil is ρ .Which of the following is the thermal capacity of the oil?

A. ρcV

B.cVρ

C. ρcVT

D.cVTρ

11. Thevolumeofanidealgasinacontainerisincreasedatconstanttemperature.Whichofthefollowingstatementsis/arecorrectaboutthemoleculesofthegas?

I. Theiraveragespeedremainsconstant.

II. Thefrequencyofcollisionsofmoleculeswithunitareaofthecontainerwalldecreases.

III. Theforcebetweenthemdecreases.

A. Ionly

B. IandIIonly

C. IandIIIonly

D. IIandIIIonly

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12. AparticleoscillateswithsimpleharmonicmotionwithperiodT.

At time t=0, theparticlehas itsmaximumdisplacement. Whichgraph shows thevariationwithtime tof thekineticenergyEkof theparticle?

A. Ek

0 T t

B. Ek

0 T t

C. Ek

0

D. Ek

00 T t 0 T t

13. An object is undergoing simple harmonicmotionwith light damping. The natural frequency ofoscillationof theobject is f0. Aperiodic forceof frequency f isapplied to theobject. Whichofthefollowinggraphsbestshowshowtheamplitudeaofoscillationof theobjectvarieswith f ?

A. a

0

B. a

0 f0 f f0 f

C. a

0

D. a

0 f0 f f0 f

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14. ThegraphshowsmeasurementsoftheheighthofsealevelatdifferenttimestintheBayofFundy.

h/m

14

12

10

8

6

4

2

00 4 8 12 16 20 24 28 32 36 40 44 48 52 t/hours

Whichofthefollowinggivestheapproximateamplitudeandperiodofthetides?

Amplitude Period

A. 6.5m 6hours

B. 13m 12hours

C. 6.5m 12hours

D. 13m 6hours

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15. Twowavesmeetatapoint.Thewaveshaveapathdifferenceofλ4.Thephasedifferencebetween

thewavesis

A. π8

rad.

B. π4

rad.

C. π2

rad.

D. π rad.

16. Two electrodes, separated by a distance d, in a vacuum are maintained at a constant potentialdifference. An electron, accelerated from one electrode to the other, gains kinetic energy Ek.

Thedistancebetweentheelectrodesisnowchangedto13

d .

Whatisthegaininkineticenergyofanelectronthatisacceleratedfromoneelectrodetotheother?

A.Ek

3

B. Ek

C. 3Ek

D. 9Ek

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17. ThegraphshowstheI–Vcharacteristicsoftworesistors.

I/A

5

4

3

2

1

0

X

Y

0 2 4 6 8 10 12 14 V/V

WhenresistorsXandYareconnected inseries, thecurrent in theresistors is2.0A. What is theresistanceoftheseriescombinationofXandY?

A. 7.0Ω

B. 1.3Ω

C. 1.1Ω

D. 0.14Ω

18. Thedefinitionoftheamperereferstothe

A. numberofelectronspassingagivenpointpersecond.

B. forcebetweenparallelcurrent-carryingconductors.

C. powerdissipatedperunitresistance.

D. amountofchargetransferredpersecond.

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19. AspacecrafttravelsawayfromEarthinastraightlinewithitsmotorsshutdown.Atoneinstantthespeedofthespacecraftis5.4kms–1.Afteratimeof600s,thespeedis5.1kms–1.Theaveragegravitationalfieldstrengthactingonthespacecraftduringthistimeintervalis

A. 5.0×10–4Nkg–1

B. 3.0×10–2Nkg–1

C. 5.0×10–1Nkg–1

D. 30Nkg–1

20. Two isolated point charges, –7μC and+2μC, are at a fixed distance apart. Atwhich point is itpossiblefortheelectricfieldstrengthtobezero?

A B C D

–7μC +2μC (nottoscale)

21. A long straightwire carries an electric current perpendicularly out of the paper. Whichof thefollowingrepresentsthemagneticfieldpatternduetothecurrent?

A. B. C. D.

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22. Whichnucleons in a nucleus are involved in theCoulomb interaction and the strong short-rangenuclearinteraction?

Coulomb interaction Strong short-range interaction

A. protons protons,neutrons

B. protons neutrons

C. protons protons

D. protons,neutrons neutrons

23. TwosamplesofradioactivesubstancesXandYhavethesameinitialactivity.Thehalf-lifeofXisTandthehalf-lifeofYis3T.Afteratimeof3T theratio

activity of substance X activity of substance Y

is

A. 8.

B. 4.

C. 14.

D. 18.

24. Thenuclearequationbelowisanexampleofthetransmutationofmercuryintogold.

12

80199

79197H Hg Au+ → + X

TheparticleXisa

A. gamma-rayphoton.

B. heliumnucleus.

C. proton.

D. neutron.

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25. TheSankeydiagramofafossil-fuelledpowerstationisshownbelow.

1

3 2

Which of the following best identifies the thermal energy removed by water and the usefulelectricalenergyoutputof thestation?

Thermal energy removed

Useful electrical energy output

A. 2 1

B. 2 3

C. 3 1

D. 1 2

26. Worldenergyresourcesincludecoal,nuclearfuelandgeothermalenergy.Whichofthefollowinglists theseresources inorderofenergyuseintheworld?

A. nuclear,geothermal,coal

B. nuclear,coal,geothermal

C. coal,geothermal,nuclear

D. coal,nuclear,geothermal

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27. Which of the following processes leads to the production of a nucleus of plutonium-239 from anucleusofuranium-238?

A. Neutroncapturebyuraniumnucleus

B. Radioactivedecayofuraniumnucleus

C. Electroncapturebyuraniumnucleus

D. Nuclearfissionofuraniumnucleus

28. Water iscontained ina tidalbasinbehindadam. Thewaterhasadepthh athigh tideandzeroat lowtide,asshownin thediagram.

dam

hightide

lowtide

h

Thegravitationalpotentialenergyofthewaterstoredinthebasinbetweenahightideandalowtideisproportionalto

A. h.

B. h.

C. h2.

D. h3.

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29. SurfaceXhasatemperatureTX andemissivityε x.SurfaceYhasatemperatureTYandemissivityε y.Thetwosurfacesemitradiationatthesamerate.

WhatistheratioTT

X

Y

?

A.εε

y

x

14

B. εε

x

y

14

C.εε

y

x

4

D. εε

x

y

4

30. Largeareasofrainforestsarecutdownandburnedeveryyear.Theresultoftheseactionsis

A. reducedalbedo.

B. reducedcarbonfixation.

C. increasedevaporationrate.

D. increasedmassofatmosphericmethane.