stpm trials 2009 physics paper 1 (clhs)

7/31/2019 STPM Trials 2009 Physics Paper 1 (CLHS)

1/9

SMJK CHUNG LING PULAU PINANGSTPM TRIAL EXAM (2009)Physics Paper 1 (1 % hour)

Iostruction: Choose the best answer. Answera n questions.1. The dimension of angular velocity is

A. . 1B. Lrlc, Lr2D. L2r

2. A force of 1000 N is needed to lift thehook of a crane at a steady velocity, Thecrane is then used to lift a load of massIgOOkg at a ve loc ity of 0.50 m S-I Howmuch of the power developed by the motorof th e cran e is used in liftill th e hook andthe load? [Take g as 10 m s' .]

c D

o~-......lIIoo,.....---,. t

A. 5.0kWB. 5.5 kWC.20kWD.22kW

4. Two wooden blocks Q and R . with masses20 kg and 15 kg respectively, are restingon asmooth horizontal surface in contactwith each other as shown in the figurebelow . A horizontal force of 70 N acts onblock Q so that the tw o blocks acceleratetogether.

3 . . The d ia gram shows th e g ra ph ofdisplacem ent s against tim e " for a bodymoving in a straight line.

S Q70N. . . R

I W hat is the horizontal force exerted by QonR?Which graph of velocity v against time tre prese nts th e mo tio n of the body over this

period?A. ONB. lONC.30ND.40N

5. A lift moves downwards with uniformacceleratio n 6 m s2 A s ta tio nary b allrela tiv e to th e lift is' r ele ase d at a h eig ht of1 m from the floor of the lift. What is thetime taken, in seconds, {or the ball to reachtbefloor of the lift? [Take g =10 ms2.]

I


2/9

14f1C 2{2

1{f

n_L4f

9. Which graph best shows how the velocity vof an object performing simple harmonicmotionofmnplirudeavaries~thdisplacement x for one completeoscillation?

10. A plane wave of amplitude A is incident ona surface of area S placed so that it isperpendicular to the direction of travel ofthe wave. The energy per unit timeintercepted by the surface is E -The amplitude of the wave is increased to2A and the area of the surface is reduced to8/2.How much energy per unit time isintercepted by this smaller surface?

A B

A.6. An experimental satellite is found to have aweight W when assembled before

launching from a rocket site. It is placed ina circular orbit at a height h=6R above thesurface of the Earth (of radius R).What is the gravitational force acting onthe satellite whilst in orbit?

B.

A. W/6B. W/7C. W/36D. W149

c.

7. A ball of mass O.lOkg is attached to astring and swung in a vertical circle ofradius O.50m, as shown. Its speed at the topof the circle is 6.0 m s-l. [Takeg as 10 m s'2.] D.0.10 kg

What is the tension in the string at thismoment?A. I.ONB. 6.2N

C. 7.2ND. 8.2N

8. An object of mass m moves in a circle ofradius r with constant angular velocity r oabout a point P. The linear speed of theobject is v and the moment of inertia aboutP is 1. What is the angular momentumaboutP?

A. 10)B. IvC. mooD. 1 0 0 2

-a 0 B x, V I '~._cd

-a 0 B

x

)C

A . 4 EB.2EC.ED. E/2

2


3/9

1 1. W h en so un d w av es p ro pag ate in air, tw op articles w hich are 0 .2 m ap art v ib ratean tip hase. If th e sp eed o f so un d in air is32 0 m s~ \ the frequency ofthe soundwaves is

A.64HzB . 80 Hz._C. 800HzD . 1600Hz

15. The most probable speed for oxygenm olecu les at room tem perature is 4 00 m s",W hich of th e fo llo win g sp eed s is the r.m.s.s pee d o f o xy ge n mo le cu les at thistemperature?

A. 80 m s"B. 360m SlC. 400m SlD.490ms- 1

12 . W hat is th e velo city ofa w av e representedby t he equa ti on y =8 sine 4 t - 5x), with xan d y measured in c en tim e tre s a nd t inseconds? 16. The molar heat capacity at constantp ressu re Cp for a diatom ic gas is

A. 4 .0 cm /sB. 2,Ocm/sC. 1.6cmlsD . O .Som ls

A. 29.1 morl K-1B . 20.8 mol" K-ICO ' 1 4 .1 morl K'}D. 12.5 marl Kj

13. Which o f th e q ua ntitie s b elow cannot bededuced from the graph below ?I

17. The graph below show s the variation ofpressure p w ith v olum e V of an id eal g asundergoing a cyc lic process . The points P,Q and R represent three states ofthe gas.{il,y. N~

11

A. P ro po rtio nal lim it o f th e w ireB. Strain of the wireC o- S tress o f th e w ireD . Energy stored in th e w ire

o 5 ! . o 1 1 o - ' l - m 3W hich states of the gas are the coldest andthe ho tt es t?

14 . Initially , tw o sam ples of id eal gases, X an dY, ar e in th e same p hy sica l sta te. X isco mp ressed ad iab atically an d Y isc omp re ssed iso th erm ally u ntil th epressures of X and Y becom e tw ice theirinitial pressu res respec tively . Which o f th efol low ing s ta temen ts is t rue conce rn ing Xand Y in th eir f in al s ta te ?

ColdestA PB PC aD R

HottestaRRQ

A. Volume of X is less than thevolumeofY.B. Temperature of X is m ore than th etem perature of Y .C . In ternal energy of X is less than the

internal energy of Y .D . W ork done by X is the same as thework done by Y.3


4/9

18. Three rods E. F and G have the sam ed iam ete rs a nd cro ss- se ctio na l a re as . T helengths of rods E, F and G are 1 . 31 and 41r es pe ctiv el y, The thermal c onduc tiv itie s o fE, F and G are Y2K, K an d 6K respectively.T he ro ds are jo in ed in series.1:--/... 3I 4/"------tl,

T he tem peratu res at bo th end s of th e join tro ds are mainta ined at 9. and 92, where 91>92At s te ady s ta te , th e tempe ra tu red ifferen ce acro ss ro d E is H. What are th etem peratu re d ifferen ces acro ss th e ro ds Fa nd G r es pe ctiv ely ?A H H

2 3 :B 3H H

2 2C SH4R "'30 3H HT '3

1 9. T he fig ure b elo w sh ow s th ree p ositiv ec harg es , e ac h o f m ag nitu de +q, w hich areplaced at the vertices P, Q , and R of anequ ilatera l t ri angle in fr ee s pa ce .. Th elen gth o f each of the three sides is 1 00. andS is the middle point of the side QR.

pS l +9,., " . .1m' ..1m, . .I ..I ..I S - ..QO----.----Oll+9 1m +q

W hat is the electric field strength at point S1

Ac

q2 R E O along PS.s.:3trEo along PS

_lL '.2mo along SPJ_3 n : E o along S P

B

D

2 0. T wo id en tical m etal balls w hich have thesam e p ositiv e ch arg e are in staticequilibrium in a ir as sh ow n in th e f ig u rebelow.

T he w hole system is th en im m ersed in anonconduct ing liquid which ha s a higherpermittivity than th e p erm ittiv ity o f air.W h ich of th e fo llow in g describes thechanges, if any, in the s ep ara tio n o f theballs and the ten sio n of the th read?[N eg lect th e u pth ru sts o f th e b alls in airan d liquid.]

Separation of Tension of thethe-balls threadA. Decreases DecreasesB. Increases DecreasesC. Decreases IncreasesD D o es no t ch ang e D o es no t ch ang e

21. A proton is in a uniform electric field. Thespeed of the proton does not increaseA. if it is stationaryB . if it is m ov in g in th e same d ire ctio nas th e e le ctric fie ldC.if it m o ves in a d irectio np erp en dic ula r to 'th e e le ctric fieldD. if itm ov es in th e o pp osite d irectio nto th e electric field


5/9

W h at is th e effectiv e cap acitan ce b etw eenX and Y?

A. IIJ;fB. 2tlFc. 3tlFD. ll).1F

23. The capacitance of a parallel-platecapacitor is 8.9 p F. It con sists of tw op arallel plates separated by a distan ce o f1 .0 m m. The capacitor is charged to 6.0 V .W hat is the area of each plate?

A. 1.5 xl0-12 m2B. 6.7 ~1O-11m2C. 1.0~10-3m2D. 6.0 ~10-3m2

2 4 . T he p ara lle l p la te ca pac ito rs in fig ure (a)a nd f ig u re (b) h av e th e sam e d im en sio ns.

Air+ .

MicatI..1'I- I

< a > (b)W h ich o f the fo llow ing show s correctly th ere la tio n sh ip b etw e en th e po te ntia ld iff ere nc e V I. with p ote ntia l d iffere nc e V z,a nd ch arg e Q., with charge Q2?

A. VI Q2B. VI


6/9

Which of the following correctly relatesthe current I,to current h?

A. I) - 212=1.5 VB. II- 2 1 z = 4.5 VC. 411 -2/z= 1.5VD. 4lt + 212=4 .5 V

28. When a resistor is connected directly to asinusoidal voltage supply of240 V rms,the current has a peak value of 10A. W ha tare the resistance of the resistor and thepower dissipated?Resistance

A 24D8 24DC 340D 34.0:

Power dissipated1700W2400W1700W2400W

29. Which circuit correctly shows theconnection of the diodes in a bridgerectifier?

A

B

c

D

30 . An electron beam enters a region inwhichth ere is an electric field perpendicular tothe beam. A similar electron beam enters amagnetic field, also perpendicular to thebeam direction. Does the magnitude of theforce on the electrons depend on theirspeeds in these two fields?

electric field magnetic fieldA . no noB . no yesC . yes noD. yes yes

31. Three straight parallel wires X. Y and Zare placed on a smooth surface and carrythe same current 1n the directions shown.Which figure correctly shows thedirections of the resultant forces, ifany, onthe wires?A x 1

1

y I1 1Z 1 B t IJ J

Y 1.Iz I1

. .c X I

~.

~y No1Onl8 I

t fZ D t I.

V Noton:e ,Z I1

6


7/9

35 . T he figu re below show s a h orizon talc oppe r p la te with an ele ctric c urre nt Iflowing through it along the direction OSin a v ertic al m ag netic fie ld .

Mapdic fIeIIl

32 . The diagram show s a sm all m agnethanging on a thread near the end of asoleno id carry ing a steady current, I.

~,W hat happens to the m agnet as the ironco re is in serted in to th e so len oid ?~....':'.'1; :'1n:JR c o r e ; : ~ . ' ..~ . . . . . . ' j ,

A . It m oves tow ards the solenoidB . Itm ov es tow ards the solen oid androtates through 1800

C. Itm oves aw ay fro m the solenoid .D . Itm oves aw ay fro m the solenoidan d ro tates through 1800

p Q

R

s

T he H all vo ltag e w hich exists in th e c opperp late w ill p ro du ce an e le ctric fie ld a ctin ga long th e d ire ctio n

33. An electron is projected at right angles to au nif orm e le ctr ic fie ld E. A.OPB, OQC, ORD. OS

E36. T he d iag ram below sh ow s an operationalam plifier w hich is co nnected to a voltage

supply of +15 V and -15 V.,I1III e le ctro nIn the absence of o ther fields, inwhichdirection is t he e le ct ron de fl ec te d?

A . into the plane of the paperB . ou t of the plane of the paperC. to th e le ftD. to th e rig ht

34 . A n ideal transfo rm er has Np turns in it sprim ary coil an d N , turns in i ts s econda ryc oil. T he alte rn atin g v oltag e a nd c urre nt inthe prim ary co il are Vp and Ip respectively;th e co rresp on din g v oltag e an d cu rren t inth e seco nd ary are v,and Is.W h ich o f th e fo llo win g relatio ns is co rrect?

100kO

Ifth e input v olta ge is +0.5 V . w hat is th epotential at point X?A. -15 VB. -5VC. +5VD. +15V

A. N. V. I C. He V p I.s-=-=-. -=~=-N p V p l p N p 'VII IpB . N . V. Ip D. Vp Ip-=-=- --:::.-:._N p Vp , I. N p Vs Is

7


8/9

37. In the op-am p circu it show n in figu re (1),th e in pu t v olta ge Vin varies s inusoidal lywith tim e, an d the ou tp ut v oltag e Vo is asshown in figure (2).

freq uen cy of th e m ag netic fieldchan ge w hen electrom ag netic w avepropagates from one m edium toa no th er medi um .

FlgU"e (1) Flg16t (2)VoM 4 0. A concave m irror m agnifies an objectplaced at a distance of30 cm from the

m irro r. T he im ag e is th ree tim es larg er andu prig ht. T he, f ocal len gth o f them irror isV o.filL A. 45.0cmB. 40.0cmC. 35.0 emD. 22.5 em

The o p- amp in the circu it fu nctio ns asA . a voltage com paratorB. a d ig it al -ana logue conve rt erC. a summ in g amplifie rD . a bu ff er amp li fi er

41. W hich of the follow ing graphs show s thev aria tio n o f u/v with u, where u is th eobject distance and v the im age distance ofa co nvex len s?

- 38. W hich of the follow ing groups ofelectromagnetic waves a re a rr angedacco rding to in creasin g ord er o fwavelength?

A C uV

A . M icro wave, v isible light; X-tay.B. Gamma r ay , u lt rav io le t r ad ia ti on ,microwave.C. I nf ra red r ad ia ti on , v is ib le light,ul travio le t radia tion .

D. X..ray. infrared. radiation, visiblelight.

0 0 uuB Du uv V

0'-- ....u u3 9. T he p ro pa ga tio n o f a n e le ctromag ne ticwave is accompanied by electric fieldo sc ill atio ns a nd magn etic f ie ld o sc illa tio ns .W hich of the follow ing statem ents is nottru e c on ce rn in g th e e le ctromag ne tic w av e?

4 2. The figure show s tw o lenses of focallengths It and fi placed in c on ta ct w i the ac h o th er .

A. T he electrom ag netic w ave canp ro pagate th rou gh a vacu wn .B. The electric field oscillations andthe magnetic field o sc illa tio ns a rein phase.C. The directions ofthe electric fieldo sc illa tio n, th e magn etic fi eldo sc illa ti on s, a nd th e e le ctr o-m ag netic field are p erpen dicu lar toone ano the r.D . The oscillating frequency of thee le ct ri c : fi eld and the o sc il la ti ng

Object Image. - - - - - - - - - - - ~ ~ + - - - - - - - - - - .

~--U---.V~IV __~If th e o bje ct d is ta nc e is u and the im agedistance is v, then I1u + I1v equals

8


9/9

A _1 +_1 C 1I i I i t,+h.B 1 1 D 1--- ~-.hh

43. A d if fr ac ti on g ra ti ng with 2400 lines percen tim etre is u sed to p ro du ce a d iffractio np atte rn th at is recorded by a detector. Thefirst-order fringe is 8.94 em from thecentral fringe. Ifthe distance betw een thegrating an d the detector is 0.625 m, what isthe wavelength of the electromagneticw av e u sed ?

A. 295 nmB. 590nmC. 1180 ru nD. 1190 nm

44. A para lle l b eam of monochromatic light ofw av ele ng th 6 00 nm illuminates ad iffractio n g ratin g n orm ally . T here are3000 lines per em on the grating. What isth e an gu lar sep aratio n b etw een th e first-o rd er im ag e an d seco nd -o rd er im ag e?A. lOAD

B. 10.70C. 11.80D. 21.10

45. A plane-polarised light is passed through ap ola riser. T he p olarisa tio n ax is is ad ju stedu ntil th e in ten sity o f light produced is at itsm ax im um v alu e I m l J J { ' Through what angles hould th e pola ris er be fu rther ro ta ted sothat the in ten sity o f lig ht b ec om es 25% oflm(f}{(A. 30.00B. 41.40

C. 60.0D. 75504 6. The maxim um kinetic energy ofp ho to electro n ex tracted fro m a m etals urfa ce doe s Dot depend on

A. the energy of radiation,B. the i nte nsi ty o f r ad ia ti on .C. the f re quency o f r ad ia ti on .D. the wave le ng th o f ra dia tio n.

4 7. W hen the surface ofa m etal is radiated bya radiat ion with photons of energy 2.00 eV,e le ctro ns a re emitted from the metalsurface with m ax im um k in etic en erg y 0 .1 0

eV. W hat is the m axim um w avelength ofthe radiation that will release electronsfro m th e m etal su rface?A. 562 nmB. 592nmC. 622 r u n

D. 654nm4 8. An e lec trom ag ne tic w av e o f w av ele ng thl.4x 10-3 m is transmitted at 210 kW. The

n um ber o f p ho to ns tran sm itted p er seco ndis A. 1.48 x 1027B. 1.52 x 1027C. 1.61 x 1028D. 1.12 x 1028

49. W hich of the following g ra ph s b es tre prese nts th e sp ectrum p ro du ce d by an x-ray tu be at tw o d ifferen t p oten tialdifference VIand V 2 (V t >V 2)?

A B

~' 5s.soL......L-----'It

50. In in vestig atin g th e arran gem en t o f ato msincrystal, X -ray s are u sed rath er than anelectro n b eam o f th e sam e w av elen gthbecause

A . the penetrating power of X-rays ish ig he r th an that o f a n e lec tro nbeam.B. ~rays are scattered th ro ug h alarger angle by atom s in the crystal.

C. X-rays have higher velocity thant he e le ctr on in t he c ry st al .D. an electron has charges and itsv elo city ch an ges d urin g its m o tio nin the crystal,

'\i.v. Prepared by C . S. K HO RPORCHAl-SEElmJAP'ANITIA F li\~ ......l\N~ Checked S. E. HONGSE!IOlJ .HMJNENGAHU.qe loNl '~ ~ .. 9. P'Ul",U P I N A " N G

stpm trials 2009 physics paper 1 (clhs)

Documents