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.; UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS International General Certificate of Secondary Education CANDIDATE NAME ~_Odc_rL_( ~_Wi_V 1__ DIIJJ CENTRE NUMBER 1 nIII CANDIDATE NUMBER ~ PHYSICS 0625/32 Paper 3 Extended October/November 2012 answer on the Question Paper. No Additional Materials are required. ez aw Candidates y 1 hour 15 minutes A- READ THESE INSTRUCTIONS FIRST G Write your Centre number, candidate number and name on all the work you hand in. Write in dark blue or black pen. You may use a pencil for any diagrams or graphs. Do not use staples, paper clips, highlighters, glue or correction fluid. DO NOT WRITE IN ANY BARCODES. For Examiner's Use l- Answer all questions. You may lose marks if you do not show your working or if you do not use appropriate units. Take the weight of 1 kg to be 10 N (i.e. acceleration of free fall = 10m / s2). E At the end of the examination, fasten all your work securely together. The number of marks is given in brackets [ 1 at the end of each question or part question. 1 2 3 4 y 5 an 6 7 8 9 H , 10 11 Total This document DC (RW/SW) 49514/4 © UCLES 2012 consists of 19 printed pages and 1 blank page . . , UNIVERSITYu/CAMBRIDGE International Examinations [Turn over ----- ---- 2 1 Fig. 1.1 shows a car on a roller-coaster ride. For Examiner's Use B water A L ez aw y C Fig.1.1 mass of car = 600 kg kinetic energy of car at point A (a) J = 160 kJ Calculate the speed of the car at A. lz m\f ~ 2x lG 2K.~= r('\ 16()OOO bOO - 5'33.1 v = ~ 533.s E speed = 2.3. m/s [3] "" (b) As the car travels from A to B, it loses 40kJ of energy due to friction. y The car just manages to roll over the crest of the hill at B. an Calculate the height h. (bO 000 - 1..,0 000 - be~j rn9 h H P.£ \2.0 000 = 600 X \0 )(. J h 12.0 000 '00 J(lh~i9ht h = © UCLES 2012 120000 0625/32/0/N/12 .20 ", [2] 3 (c) At C, the car is slowed down by a shallow tank of water and the kinetic energy of the car is reduced to zero. For Examiner's Use Make three suggestions for what happens to this kinetic energy. ~+ w.~ 1 ~.,; 2 P·.8 3 )Ourd ~I: . IN.~ . . ~J ( -M·~rJ. [3] H an y E lG ez aw y [Total: 8] © UCLES 2012 0625/32/0/N/12 [Turn over 4 2 Fig. 2.1 is a head-on view of an airliner flying at constant speed in a circular horizontal path. The centre of the circle is to the left of the diagram. c~ * Fig. 2.1 On Fig. 2.1, draw the resultant force acting on the airliner. Explain your answer . .............. ~~(.~·VJ.ec. ez aw y (a) ().Cr.efe.rdJ.f",t:j (~an;,.~n.'1 cG~~c:h;)V)). ht····fOdD in..C...~ {~..f+ ......................... dtlc.o.H.~). ~ ..C;nkipek.Q &~.~._ ............. ~d. CdM.~ (b) The weight of the airliner is 1.20 x 106 N and there is an aerodynamic 1.39 x 106 N acting at 30° to the left of the vertical. . [3] lift force of lG By drawing a scale vector diagram, or otherwise, show that the resultant of these two forces is in the same direction as the resultant force you drew in (a). Sear£. j.. CvY\ = I. 0 x :06 N C,2~ X lOG N \.2 ~IO E o~ 4-·Cftl:' e 1,?qx.\O t1~2 :::::556 an y I I 1 e ~ I K'""' I I I H (f -== l.ft (',sqXlo' N) 'l<esu.~~~ 2,~~ em F;'N -::.O.f I X ~ \0 G N We.-,,,t nOri~(?A.( ~ Lelt ( ,.2 X\06 N) [3] 0625/32/0/N/12 © UCLES 2012 "4 For Examiner's Use 5 (c) The speed is constant as the airliner flies in this circular path. For Examiner's Use State and explain what is happening to the velocity. IldCJei/'/CM'9!J..................................................................................................................................... [2] H an y E lG ez aw y [Total: 8] © UCLES 2012 0625/32/0/N/12 [Turn over 6 3 A thermometer (a) uses the value of a physical property to indicate the temperature. A particular thermometer is sensitive, linear and has a wide range. Draw a straight line from each characteristic feature. characteristic For Examiner's Use of this thermometer of thermometer to the appropriate feature of thermometer reacts quickly to change of temperature sensitive ez aw y large difference between highest and lowest measurable temperatures __-~...Jsame change I linear of physical property for same change of temperature I fixed points at O·C and 100·C wide range (i) [3] In the space below, draw a diagram to show the structure thermometer. E (b) lG large change of physical property for small change of temperature n1eter H an y M"Hi af" of a thermocouple [2] © UCLES 2012 0625/32/0/N/12 7 (ii) Explain why a thermocouple thermometer is particularly well suited to measure For Examiner's Use 1. high temperatures, ........................... hJ.efau /Will n.o7. ~.lf ........................... .gi~s p...d. ~.~j.h · . 1eb.r.. ! . 2. very rapidly changing temperatures . . sma.lI. httJ······¥C;+-t·························· . .................................................................................................................................. [2] H an y E lG ez aw y [Total: 7] © UCLES 2012 0625/32/0/N/12 [Turn over 8 4 (a) Fig. 4.1 shows some gas contained in a cylinder by a heavy piston. The piston can move up and down in the cylinder with negligible friction. atmosphere heavy piston cylinder gas of the atmosphere above the piston. ez aw There is a small increase in the p.~e y Fig.4.1 (i) On Fig. 4.1, draw a possible new position for the lower face of the piston. (ii) Explain, in terms of the molecules of the gas and the molecules of the atmosphere, your answer to (a)(i) . .............. /1Ir:. c:p.(((c! 0.1F e4c.h. ..o1f\A.t': waJ{s (pi.$..Th rJ. m.p./(C~I wi.1i G ......................... ~ p.ls.ron ......................... ;t. n1D.veS £ p.rr.f.:oA tJ/rh1.. ..... .p.r.e!J:u.~ I fO.~.~.·.·~cr·U~ E l- ..................;[Or:-uz. 8I<.ev:fr!d a.n H an y ............................................................................................................................. © UCLES 2012 0625/32/0/N/12 [1] . . . . . [3] For Examiner's Use 9 (b) The pressure of the atmosphere above the piston returns to its original value, and the piston returns to its original position, as shown in Fig. 4.2. atmosphere heavy piston For Examiner's Use cylinder gas ez aw y Fig. 4.2 The gas, piston and cylinder are now heated to a much higher temperature. (i) (ii) On Fig. 4.2, draw a possible new position for the lower face of the piston. [1] Explain, in terms of the molecules of the gas and the molecules of the atmosphere, your answer to (b)(i). ~ lG Air(tYsJmolrC»1.trm..S!er ..................... m.o~....GoIl/J/~."".t bd~I4 .... #a.J.....ro.~ .......................~A ..:fA.Ch..o..~ .... c...~..W·;ft. ....v.I.<V!~·..~ ..Pt!~ g~t4iJrfi«(£/pl'Ulu.lh.on~botkogJ mOy..~J I:.t E ..................... pj;S~n . [2] [Total: 7] H an y P rtJ.tf),ie (fof'~~) e1 ~ UP.. ()rthlt. © UCLES 2012 0625/32/0/N/12 [Turn over 10 5 Fig. 5.1 shows a thin plastic cup containing hot coffee, which an IGCSE Physics student gets from a machine. Fig. 5.2 shows how another student, who finds an empty second cup, has placed his identical cup of coffee inside this second cup. \\------------tl--thick rim coffee coffee thin cup ~-----; single cup double cup Fig. 5.1 (a) I ez aw y /----- Fig. 5.2 Suggest and explain a difference that the students will feel when' holding the cups . _I . ............................ CM.\.l lG ......................... ,!)Ou..blo UJp tl~t.s.Q n.ot ............................. te«. ev..J. 4rA»~I&. ~ .&> .L~ ....~ ... ~o.lc( . r_.It. p~~tI. ..u .. rn.~...~'ur""".""" ~ H an y E ....................... ~a..~r.. ir ..q:>~.c...... C4~~.~ © UCLES 2012 t: 0625/32/0/N/12 .L1....- <(.~cat.~ .. . .. s :': [2] For Examiner's Use 11 (b) The students discuss this experience subject of an experiment. with their teacher, who makes hot drinks the For Examiner's Use The same volume of hot water at the same temperature is placed in the single cup and in the double cup. The temperature of the water in each cup is recorded for 10 minutes. Fig. 5.3 shows the cooling curve for the water in the single cup. single cup 70 e, u temperature 60 y IOC 40 o 2 aw 50 4 6 8 10 ez time I minutes Fig. 5.3 On Fig. 5.3, sketch and label a possible cooling curve for the water in the double cup. G Explain why a cup of coffee cools more slowly when a lid is placed over the cup. E l- (c) [2] il:-~us~e,..t!lo~.l:bt·~n.~n .......................i.t. rek.lt ..~ ,~ y ······ ..····<~·········rQ~···C4."' ~'~ .C9.X1.~d)~ ct ~ an ...................... 'j ................................................ ~J~CAl'\)O ~ ev.~n.diOt\. ~~f. . IM-(l.~~~~Jm.. Co~U~. ··rf'!P.·ct:P··~7········ ..~..~ . [2] H [Total: 6] © UCLES 2012 0625/32/0/N/12 [Turn over 12 6 Solar panels are positioned on the roof of the house shown in Fig. 6.1. They use thermal energy from the Sun to provide hot water in an environmentally friend.ly way. For Examiner's Use solar panels ~=T-::::::::~~-J.~-.L JDDl DO JDDl DO JDDl DO ez aw y JDDl DO Fig. 6.1 Cold water flows to the panels at 15°C. During the day, the panels supply 3.8 kg of hot water AT==- 6S _\ s~ S at 65°C every hour. (a) Calculate the average energy that the solar panels deliver to the water in one hour. Specific heat capacity of water = 4200 J / (kg "C). lG o ~c ~T - 3.SX 4200 E = 1.qg OOO...J [3] The solar power incident on the roof during this heating period is ..:.17:..;;0::...0:-_ The2. solar panels have a total area of 8.0 m2 an y (b) energy 1-.50 - Calculate the solar energy incident on the panels in one hour. H E= "P )(-t (c) =0=10 X 8 solar energy = Mt.) X (I ~ kx '0')( ~q.6 0.00 bO) J [2] Calculate the efficiency of the solar panels, stating the equation you use. e!C = 9.$~1 O\J~t.J. = -=rqg oooJ (Y\PvJ- '-1 ~Cf6 efficiency © UCLES 2012 0625/32/0/N/12 = 000 .\.6 % XIOO [2] C. 13 (d) Explain why solar energy is called renewable energy. ................................... ~.i.~~ ~\\ &:t f(r~:~.+.~ .('(ul\ ..1)~.). . ..................................................... 'O.e\Je.~ eu.&.)................................................... (e) State one disadvantage .. For Examiner's Use [1] of using solar energy . .. l)o~,.n~+ Luc.~.~ crl V\A~\+: ·····································'A'·df.\·····\·t'\·\.b:~.\Co.c;.t of. ~V\ek . [1] H an y E lG ez aw y [Total: 9] © UCLES 2012 0625/32/0/N/12 [Turn over 14 A small object is placed 3.0cm from the centre of a convex lens of focal length 6.0cm. An enlarged image is observed from the other side of the lens. (a) For Examiner's Use On Fig. 7.1, draw a ray diagram to show the formation of this image. lG ez aw y 7 Fig. 7.1 (b) (i) State why this type of image is called virtual . ......... ~~Ca~.~ot ..be..fn('"et:L.on s.~(.tt.~I bLc. t~~ o.'4.~..i~.1ir ..~ ..ib. E .d.iv&'~i'j.. (ii) a~ . [1] State the common name given to a convex lens used in this manner. an y ..................... H~I);55' ..EFSS ....................•.............................. [1[ [Total: 5] H © UCLES 2012 [3] 0625/32/0/N/12 15 8 (a) A student rubs one side of an inflated balloon on her hair. This side of the balloon becomes positively charged. Explain this. ........... Rubb.i~ ~~."e.. ........... '-We'" hq.u.O~ ~~.J cMa('~ ~~.~.~ t-O···· ·hrttr····.~COY.lL.S . . ~ ......................... ~ For Examiner's Use [2] (b) The charged side of the balloon is now brought close to a stream of water flowing from a pipe. The original position of the stream of water is shown in Fig. 8.1. On Fig. 8.1, write in the boxes to indicate how each side of the stream of water is electrically charged. y Choose your answer in each case from: positive, negative or neutral. ez aw PiPe~111 ~ ~stream of water E l- G balloon Fig.8.1 y On Fig. 8.1, draw the new position of the stream of water. Explain this new position . an (c) [2] ......................... Stre.arn H ....ba.c , <Ml~.ct"' ~ (d) . :~... . .....··neaan~~'~cac-"""" .........................~ r.;a.ht.. . i.~ wA"«: C.ha.("7f".( O() S.~r:n \oa'.lQ.Q.~ <rltYaeJr:tJ [2] Explain why rubbing one side of a metal sphere does not cause it to become charged . ................... He.t.Cl(J ~.r.t gao.d ~Y\~d"or. ................................... ~ {t.t~ ~t! elr.~.~ . ...•................................... [1] [Total: 7] © UCLES 2012 0625/32/0/N/12 [Turn over 16 Fig. 9.1 shows an experiment carried out in a vacuum to investigate a-particles and y-rays in a rnaqnetic.field. radioactive source emitting a-particles and y-rays lead cylinder with small hole Fig. 9.1 For Examiner's Use y thin beam of a-particles and y-rays Complete the table to describe the deflection, if any, of the a-particles the magnetic field shown. Place one tick in each column. a-particles possible deflection and the y-rays in y-rays V G no deflection of ez (a) the deflection aw 9 towards N pole of magnet E l- towards S pole of magnet out of paper V an y into paper [3] (b) The experiment of Fig. 9.1 was carried out in a vacuum. State the effect of carrying out the experiment in air . W.il' J.:e sf.o~ (w.'\. Co.n+i.t\.V~ b, ~ . .(ctA'r: ..\.~.C\.l.u.·~1··qjpM) H ......................cX .......................~ ..................................................................................................................................... (c) [2] State and explain the purpose of the lead cylinder . .................... l.ead C(.~$O.(..bS y-~olJ~\;:)n : . 0ll1~&t....L!('¥i.HliMIN~{(!~ ........................................................ .\{l4S5. [2] [Total: 7] © UCLES 2012 0625/32/0/N/12 17 (a) Determine which one of the following resistors, connected in. parallel with a 24.0 Q resistor, would give a total resistance of 8.0 Q. Show your working. Available resistors: I 'RT -.L g \ I~ :: - l.+L 'R, ~2. ..L~L 2.4 RL .14 + R2 'lR 2. =- - s -2:tr Rl (i) 24 2. Q:z. ~ + R'L 2.'-\ .l2 value of resistor = (b) For Examiner's Use 2.0Q, 4.0Q, 6.0Q, 8.0Q, 12.0Q, 16.0Q, 18.0Q, 32.0Q ez aw y 10 ~ [3] In the space below, draw the parallel combination of resistors from (a) connected in a circuit with a 6.0V battery. The circuit should also include an ammeter to measure the current in the 24.0 Q resistor. ,v~ ,.... / r--t --~ lG r------f E 24..n y Calculate the current in each of the resistors when connected your working. . H an (ii) [2] as in (b)(i). Show };:.v/R T .= ~ I~~ 12.. _ O. '2S A _ 0.5 A- current in 24.0Q resistor = current in the other resistor = O.~.QS A: O 5 .f.\ . . [3] [Total: 8] © UCLES 2012 0625/32/0/N/12 [Turn over 18 11 A student carries out an experiment with the circuit shown in Fig. 11.1. The component in the dashed box labelled X is a diode. X 3.0Q A 3.0Q , , , , 1 _ , Fig.11.1 On Fig. 11.1, draw the correct symbol for a diode, connected either way round, in the dashed box labelled X. [1] (b) (i) ez aw y (a) + 6.0V is applied to point A, OV to point B. State what the student observes on the ammeter . ............. .~..~H~c*l~"-f\ (ii) -6.0V is applied to point A, OV to point B. . "'<E-- State what the student observes on the ammeter . ............... N.. (c) d.c.t.f t..c:bb~ lG f) . [2] The voltage shown in Fig. 11.2 is applied to the point A of the circuit in Fig. 11.1. Point B is kept at 0 V. E On Fig. 11.2, draw a graph of the readings indicated by the voltmeter. y 10 an 5 -- H V/V tis 5 10 Fig.11.2 [2] © UCLES 2012 0625f32fOfNf12 For Examiner's Use 19 (d) The circuit shown in Fig. 11.3 contains two switches 81 and 82 and two indicator lamps L1 and L2· 81 ~ L1 -rI I --'-- 82 ez aw y L2 Fig.11.3 (ii) ~.VlS..;J.f9.c Name component Z switch 81 open switch 82 lamp L1 lamp L2 closed otf ofF open OVl 00 E closed [2] an y [Total: 8] H © UCLES 2012 [1] Complete the table to state whether the lamps are on or off with the switches in the positions stated. . lG (i) 0625/32/0/N/12 For Examiner's Use