wednesday 11 may 2011 (afternoon) instructions to

2211-6510 14 pages

M11/4/PHYSI/SPM/ENG/TZ1/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. Whichofthefollowingcontainsonefundamentalandonederivedunit?

A. ampere kilogram

B. ampere coulomb

C. joule newton

D. joule coulomb

2. ThecurrentIthrougharesistorismeasuredwithadigitalammetertobe0.10A.TheuncertaintyinthecalculatedvalueofI 2willbe

A. 1%.

B. 2%.

C. 5%.

D. 20%.

3. Askydiverofmass80kgfallsverticallywithaconstantspeedof50 1ms− .Theupwardforceactingontheskydiverisapproximately

A. 0N.

B. 80N.

C. 800N.

D. 4000N.

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4. Josephrunsalongalongstraighttrack.Thevariationofhisspeedvwithtimetisshownbelow.

12

10

8

6

4

2

00

5 10 15 20 25 30t /s

v / ms–1

After25secondsJosephhasrun200m.Whichofthefollowingiscorrectat25seconds?

Instantaneous speed / m s–1 Average speed / m s–1

A. 8ms–1 8ms–1

B. 8ms–1 10ms–1

C. 10ms–1 8ms–1

D. 10ms–1 10ms–1

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5. Acarofmass1000kgacceleratesonastraight,flat,horizontalroadwithanaccelerationa = 0 3 2. .ms− ThedrivingforceFonthecarisopposedbyaresistiveforceof500N.

F 500N

a = 0 3 2. .ms−

Thenet(resultant)forceonthecaris

A. 200N.

B. 300N.

C. 500N.

D. 800N.

6. Atennisballofmassmmovinghorizontallywithspeedustrikesaverticaltennisracket.Theballbouncesbackwithahorizontalspeedv.

um

v

Themagnitudeofthechangeinmomentumoftheballis

A. m (u + v).

B. m (u – v).

C. m (v – u).

D. zero.

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7. A brother and sister take the same time to run up a set of steps. The sister has a greatermassthanherbrother. Whichof thefollowing iscorrect?

Has done the most work Has developed the greatest power

A. brother brother

B. brother sister

C. sister brother

D. sister sister

8. Anuclearpowerstationproduces10GWofelectricalpower.Thepowergeneratedbythenuclearreactionsinthecoreofthereactoris25GW.Theefficiencyofthepowerstationis

A. 15%.

B. 35%.

C. 40%.

D. 60%.

9. Acyclistridesaroundacirculartrackatauniformspeed.Whichofthefollowingcorrectlygivesthenethorizontal forceon thecyclistatanygiveninstantoftime?

Net horizontalforce along direction of motion

Net horizontalforce normal to direction of motion

A. zero zero

B. zero nonzero

C. nonzero zero

D. nonzero nonzero

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10. Asolidpieceoftungstenmeltsintoliquidwithoutachangeintemperature.Whichofthefollowingiscorrectforthemoleculesintheliquidphasecomparedwiththemoleculesinthesolidphase?

Kinetic energy Potential energy

A. same greater

B. same same

C. greater greater

D. greater same

11. Whatisthemassofcarbon-12thatcontainsthesamenumberofatomsas14gofsilicon-28?

A. 6g

B. 12g

C. 14g

D. 24g

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12. Aheaterofconstantpowerheatsaliquidofmassmandspecificheatcapacityc.Thegraphbelowshowshowthetemperatureoftheliquidvarieswithtime.

time

temperature

00

Thegradientofthegraphiskandnoenergyislosttothesurroundings.Whatisthepoweroftheheater?

A. kmc

B. kmc

C. mck

.

D. 1kmc

.

13. Atransversewavetravelsfromlefttoright.Thediagrambelowshowshow,ataparticularinstantoftime,thedisplacementofparticlesinthemediumvarieswithposition.Whicharrowrepresentsthedirectionof thevelocityof theparticlemarkedP?

position0 0

ABD

C

P

displacement

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14. Thegraphshowshowthedisplacementvarieswithtimeforanobjectundergoingsimpleharmonicmotion.

time

displacement

Whichgraphshowshowtheobject’saccelerationavarieswithtimet?

B.

t

a

D.

t

a

A.

t

a

C.

t

a

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15. Lighttravelsfromairintoglassasshownbelow.

PQ

S

R

air

glass

normal

Whatistherefractiveindexofglass?

A. sinsin

PS

B. sinsin

QR

C. sinsin

PR

D. sinsin

QS

16. Whichofthefollowingelectromagneticwaveshasafrequencygreaterthanthatofvisiblelight?

A. Ultraviolet

B. Radio

C. Microwaves

D. Infrared

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17. Oneelectronvoltisequalto

A. 1 6 10 19. × − C.

B. 1 6 10 19. × − J.

C. 1 6 10 19. × − V.

D. 1 6 10 19. × − W.

18. A battery of internal resistance 2Ω is connected to an external resistance of 10Ω. The currentis0.5A.

0.5 A

10 Ω

2 Ω

Whatistheemfofthebattery?

A. 1.0V

B. 5.0V

C. 6.0V

D. 24.0V

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19. In thecircuitbelow,whichof the followingwillcause thegreatest increase in the readingof thevoltmeter?

12 V

0 V

A. Anincreaseintemperature

B. Anincreaseinlightintensity

C. Adecreaseintemperature

D. Adecreaseinlightintensity

20. A spherical planet of uniform density has three times the mass of the Earth and twice theaverage radius. Themagnitudeof thegravitationalfield strength atthesurfaceof theEarth isg.What is thegravitationalfieldstrengthat thesurfaceof theplanet?

A. 6g

B. 23

g

C. 34

g

D. 32

g

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21. Anelectronpassesthenorthpoleofabarmagnetasshownbelow.

S N electron

Whatisthedirectionofthemagneticforceontheelectron?

A. Intothepage

B. Outofthepage

C. Totheleft

D. Totheright

22. Which of the following gives the correct number of protons and neutrons in a nucleus ofcarbon-14 6

14C( ).

Protons Neutrons

A. 8 6

B. 6 8

C. 14 6

D. 6 14

23. Afreshlypreparedsamplecontains4 0. µgofiodine-131.After24days,0 5. µgofiodine-131remain.Thebestestimateofthehalf-lifeofiodine-131is

A. 8days.

B. 12days.

C. 24days.

D. 72days.

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24. Whichofthefollowingcausesthegreatestnumberofionizationsasitpassesthrough1cmofair?(Thetotalenergyoftheionizingradiationisthesame.)

A. Analphaparticle

B. Abetaparticle

C. Agamma-ray

D. AnX-ray

25. Whatisthephenomenonthatbestexplainswhygreenhousegasesabsorbinfraredradiation?

A. Resonance

B. Interference

C. Refraction

D. Diffraction

26. Inwhichofthefollowingplaceswillthealbedobegreatest?

A. Aforest

B. Agrassland

C. Anocean

D. Apolaricecap

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27. AwindturbineproducesapowerPwhenthewindspeedisv.Assumingthattheefficiencyoftheturbineisconstant,thebestestimateforthepowerproducedwhenthewindspeedbecomes2vis

A. 2P.

B. 4P.

C. 6P.

D. 8P.

28. AsphericalblackbodyhasabsolutetemperatureT1.ThesurroundingsarekeptatalowerabsolutetemperatureT2.Whatisthenetpowerperunitarealostbythebody?

A. σT14

B. σT24

C. σ T T14

24−( )

D. σ T T14

24+( )

29. Thedesignofanuclearpowerstationincludesanelectricalgenerator.Thefunctionofthegeneratoristoconvert

A. nuclearenergytokineticenergy.

B. kineticenergytothermalenergy.

C. thermalenergytoelectricalenergy.

D. kineticenergytoelectricalenergy.

30. Whatistheunitofsurfaceheatcapacity?

A. J kg K− −1 1.

B. JK−1.

C. Jm K− −2 1.

D. Jm K− −3 1.

wednesday 11 may 2011 (afternoon) instructions to

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